// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "gmock/gmock.h"

#include "src/tint/lang/core/fluent_types.h"
#include "src/tint/lang/core/type/depth_texture.h"
#include "src/tint/lang/core/type/external_texture.h"
#include "src/tint/lang/core/type/multisampled_texture.h"
#include "src/tint/lang/core/type/sampled_texture.h"
#include "src/tint/lang/core/type/texture_dimension.h"
#include "src/tint/lang/wgsl/ast/call_statement.h"
#include "src/tint/lang/wgsl/ast/disable_validation_attribute.h"
#include "src/tint/lang/wgsl/ast/id_attribute.h"
#include "src/tint/lang/wgsl/ast/stage_attribute.h"
#include "src/tint/lang/wgsl/ast/workgroup_attribute.h"
#include "src/tint/lang/wgsl/inspector/entry_point.h"
#include "src/tint/lang/wgsl/inspector/inspector.h"
#include "src/tint/lang/wgsl/inspector/inspector_builder_test.h"
#include "src/tint/lang/wgsl/inspector/inspector_runner_test.h"
#include "src/tint/lang/wgsl/program/program_builder.h"
#include "src/tint/lang/wgsl/sem/variable.h"

using namespace tint::core::number_suffixes;  // NOLINT
using namespace tint::core::fluent_types;     // NOLINT

namespace tint::inspector {
namespace {

// All the tests that descend from InspectorBuilder are expected to define their test state via
// building up the AST through InspectorBuilder and then generate the program with ::Build. The
// returned Inspector from ::Build can then be used to test expectations.
//
// All the tests that descend from InspectorRunner are expected to define their test state via a
// WGSL shader, which will be parsed to generate a Program and Inspector in ::Initialize. The
// returned Inspector from ::Initialize can then be used to test expectations.

class InspectorGetEntryPointTest : public InspectorBuilder, public testing::Test {};

typedef std::tuple<inspector::ComponentType, inspector::CompositionType>
    InspectorGetEntryPointComponentAndCompositionTestParams;
class InspectorGetEntryPointComponentAndCompositionTest
    : public InspectorBuilder,
      public testing::TestWithParam<InspectorGetEntryPointComponentAndCompositionTestParams> {};
struct InspectorGetEntryPointInterpolateTestParams {
    core::InterpolationType in_type;
    core::InterpolationSampling in_sampling;
    inspector::InterpolationType out_type;
    inspector::InterpolationSampling out_sampling;
};
class InspectorGetEntryPointInterpolateTest
    : public InspectorBuilder,
      public testing::TestWithParam<InspectorGetEntryPointInterpolateTestParams> {};
class InspectorGetOverrideDefaultValuesTest : public InspectorBuilder, public testing::Test {};
class InspectorGetConstantNameToIdMapTest : public InspectorBuilder, public testing::Test {};
class InspectorGetResourceBindingsTest : public InspectorBuilder, public testing::Test {};
class InspectorGetUniformBufferResourceBindingsTest : public InspectorBuilder,
                                                      public testing::Test {};
class InspectorGetStorageBufferResourceBindingsTest : public InspectorBuilder,
                                                      public testing::Test {};
class InspectorGetReadOnlyStorageBufferResourceBindingsTest : public InspectorBuilder,
                                                              public testing::Test {};
class InspectorGetSamplerResourceBindingsTest : public InspectorBuilder, public testing::Test {};
class InspectorGetComparisonSamplerResourceBindingsTest : public InspectorBuilder,
                                                          public testing::Test {};
class InspectorGetSampledTextureResourceBindingsTest : public InspectorBuilder,
                                                       public testing::Test {};
class InspectorGetSampledArrayTextureResourceBindingsTest : public InspectorBuilder,
                                                            public testing::Test {};
struct GetSampledTextureTestParams {
    core::type::TextureDimension type_dim;
    inspector::ResourceBinding::TextureDimension inspector_dim;
    inspector::ResourceBinding::SampledKind sampled_kind;
};
class InspectorGetSampledTextureResourceBindingsTestWithParam
    : public InspectorBuilder,
      public testing::TestWithParam<GetSampledTextureTestParams> {};
class InspectorGetSampledArrayTextureResourceBindingsTestWithParam
    : public InspectorBuilder,
      public testing::TestWithParam<GetSampledTextureTestParams> {};
class InspectorGetMultisampledTextureResourceBindingsTest : public InspectorBuilder,
                                                            public testing::Test {};
class InspectorGetMultisampledArrayTextureResourceBindingsTest : public InspectorBuilder,
                                                                 public testing::Test {};
typedef GetSampledTextureTestParams GetMultisampledTextureTestParams;
class InspectorGetMultisampledArrayTextureResourceBindingsTestWithParam
    : public InspectorBuilder,
      public testing::TestWithParam<GetMultisampledTextureTestParams> {};
class InspectorGetMultisampledTextureResourceBindingsTestWithParam
    : public InspectorBuilder,
      public testing::TestWithParam<GetMultisampledTextureTestParams> {};
class InspectorGetStorageTextureResourceBindingsTest : public InspectorBuilder,
                                                       public testing::Test {};
struct GetDepthTextureTestParams {
    core::type::TextureDimension type_dim;
    inspector::ResourceBinding::TextureDimension inspector_dim;
};
class InspectorGetDepthTextureResourceBindingsTestWithParam
    : public InspectorBuilder,
      public testing::TestWithParam<GetDepthTextureTestParams> {};

class InspectorGetDepthMultisampledTextureResourceBindingsTest : public InspectorBuilder,
                                                                 public testing::Test {};

typedef std::tuple<core::type::TextureDimension, ResourceBinding::TextureDimension> DimensionParams;
typedef std::tuple<core::TexelFormat, ResourceBinding::TexelFormat, ResourceBinding::SampledKind>
    TexelFormatParams;
typedef std::tuple<DimensionParams, TexelFormatParams, core::Access> GetStorageTextureTestParams;
class InspectorGetStorageTextureResourceBindingsTestWithParam
    : public InspectorBuilder,
      public testing::TestWithParam<GetStorageTextureTestParams> {};

class InspectorGetExternalTextureResourceBindingsTest : public InspectorBuilder,
                                                        public testing::Test {};

class InspectorGetSamplerTextureUsesTest : public InspectorRunner, public testing::Test {};

class InspectorGetUsedExtensionNamesTest : public InspectorRunner, public testing::Test {};

class InspectorGetEnableDirectivesTest : public InspectorRunner, public testing::Test {};

// This is a catch all for shaders that have demonstrated regressions/crashes in
// the wild.
class InspectorRegressionTest : public InspectorRunner, public testing::Test {};

TEST_F(InspectorGetEntryPointTest, NoFunctions) {
    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(0u, result.size());
}

TEST_F(InspectorGetEntryPointTest, NoEntryPoints) {
    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(0u, result.size());
}

TEST_F(InspectorGetEntryPointTest, OneEntryPoint) {
    MakeEmptyBodyFunction("foo", Vector{
                                     Stage(ast::PipelineStage::kFragment),
                                 });

    // TODO(dsinclair): Update to run the namer transform when available.

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ("foo", result[0].name);
    EXPECT_EQ("foo", result[0].remapped_name);
    EXPECT_EQ(PipelineStage::kFragment, result[0].stage);
}

TEST_F(InspectorGetEntryPointTest, MultipleEntryPoints) {
    MakeEmptyBodyFunction("foo", Vector{
                                     Stage(ast::PipelineStage::kFragment),
                                 });

    MakeEmptyBodyFunction("bar", Vector{
                                     Stage(ast::PipelineStage::kCompute),
                                     WorkgroupSize(1_i),
                                 });

    // TODO(dsinclair): Update to run the namer transform when available.

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(2u, result.size());
    EXPECT_EQ("foo", result[0].name);
    EXPECT_EQ("foo", result[0].remapped_name);
    EXPECT_EQ(PipelineStage::kFragment, result[0].stage);
    EXPECT_EQ("bar", result[1].name);
    EXPECT_EQ("bar", result[1].remapped_name);
    EXPECT_EQ(PipelineStage::kCompute, result[1].stage);
}

TEST_F(InspectorGetEntryPointTest, MixFunctionsAndEntryPoints) {
    MakeEmptyBodyFunction("func", tint::Empty);

    MakeCallerBodyFunction("foo", Vector{std::string("func")},
                           Vector{
                               Stage(ast::PipelineStage::kCompute),
                               WorkgroupSize(1_i),
                           });

    MakeCallerBodyFunction("bar", Vector{std::string("func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    // TODO(dsinclair): Update to run the namer transform when available.

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    EXPECT_FALSE(inspector.has_error());

    ASSERT_EQ(2u, result.size());
    EXPECT_EQ("foo", result[0].name);
    EXPECT_EQ("foo", result[0].remapped_name);
    EXPECT_EQ(PipelineStage::kCompute, result[0].stage);
    EXPECT_EQ("bar", result[1].name);
    EXPECT_EQ("bar", result[1].remapped_name);
    EXPECT_EQ(PipelineStage::kFragment, result[1].stage);
}

TEST_F(InspectorGetEntryPointTest, DefaultWorkgroupSize) {
    MakeEmptyBodyFunction("foo", Vector{
                                     Stage(ast::PipelineStage::kCompute),
                                     WorkgroupSize(8_i, 2_i, 1_i),
                                 });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    auto workgroup_size = result[0].workgroup_size;
    ASSERT_TRUE(workgroup_size.has_value());
    EXPECT_EQ(8u, workgroup_size->x);
    EXPECT_EQ(2u, workgroup_size->y);
    EXPECT_EQ(1u, workgroup_size->z);
}

TEST_F(InspectorGetEntryPointTest, NonDefaultWorkgroupSize) {
    MakeEmptyBodyFunction("foo", Vector{
                                     Stage(ast::PipelineStage::kCompute),
                                     WorkgroupSize(8_i, 2_i, 1_i),
                                 });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    auto workgroup_size = result[0].workgroup_size;
    ASSERT_TRUE(workgroup_size.has_value());
    EXPECT_EQ(8u, workgroup_size->x);
    EXPECT_EQ(2u, workgroup_size->y);
    EXPECT_EQ(1u, workgroup_size->z);
}

TEST_F(InspectorGetEntryPointTest, WorkgroupStorageSizeEmpty) {
    MakeEmptyBodyFunction("ep_func", Vector{
                                         Stage(ast::PipelineStage::kCompute),
                                         WorkgroupSize(1_i),
                                     });
    Inspector& inspector = Build();
    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].workgroup_storage_size);
}

TEST_F(InspectorGetEntryPointTest, WorkgroupStorageSizeSimple) {
    AddWorkgroupStorage("wg_f32", ty.f32());
    MakePlainGlobalReferenceBodyFunction("f32_func", "wg_f32", ty.f32(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("f32_func")},
                           Vector{
                               Stage(ast::PipelineStage::kCompute),
                               WorkgroupSize(1_i),
                           });

    Inspector& inspector = Build();
    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(4u, result[0].workgroup_storage_size);
}

TEST_F(InspectorGetEntryPointTest, WorkgroupStorageSizeCompoundTypes) {
    // This struct should occupy 68 bytes. 4 from the i32 field, and another 64
    // from the 4-element array with 16-byte stride.
    auto* wg_struct_type = MakeStructType("WgStruct", Vector{
                                                          ty.i32(),
                                                          ty.array<i32, 4>(Vector{
                                                              Stride(16),
                                                          }),
                                                      });
    AddWorkgroupStorage("wg_struct_var", ty.Of(wg_struct_type));
    MakeStructVariableReferenceBodyFunction("wg_struct_func", "wg_struct_var",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    // Plus another 4 bytes from this other workgroup-class f32.
    AddWorkgroupStorage("wg_f32", ty.f32());
    MakePlainGlobalReferenceBodyFunction("f32_func", "wg_f32", ty.f32(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("wg_struct_func"), "f32_func"},
                           Vector{
                               Stage(ast::PipelineStage::kCompute),
                               WorkgroupSize(1_i),
                           });

    Inspector& inspector = Build();
    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(72u, result[0].workgroup_storage_size);
}

TEST_F(InspectorGetEntryPointTest, WorkgroupStorageSizeAlignmentPadding) {
    // vec3<f32> has an alignment of 16 but a size of 12. We leverage this to test
    // that our padded size calculation for workgroup storage is accurate.
    AddWorkgroupStorage("wg_vec3", ty.vec3<f32>());
    MakePlainGlobalReferenceBodyFunction("wg_func", "wg_vec3", ty.vec3<f32>(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("wg_func")},
                           Vector{
                               Stage(ast::PipelineStage::kCompute),
                               WorkgroupSize(1_i),
                           });

    Inspector& inspector = Build();
    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(16u, result[0].workgroup_storage_size);
}

TEST_F(InspectorGetEntryPointTest, WorkgroupStorageSizeStructAlignment) {
    // Per WGSL spec, a struct's size is the offset its last member plus the size
    // of its last member, rounded up to the alignment of its largest member. So
    // here the struct is expected to occupy 1024 bytes of workgroup storage.
    const auto* wg_struct_type = MakeStructTypeFromMembers(
        "WgStruct", Vector{
                        MakeStructMember(0, ty.f32(), Vector{MemberAlign(1024_i)}),
                    });

    AddWorkgroupStorage("wg_struct_var", ty.Of(wg_struct_type));
    MakeStructVariableReferenceBodyFunction("wg_struct_func", "wg_struct_var",
                                            Vector{
                                                MemberInfo{0, ty.f32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("wg_struct_func")},
                           Vector{
                               Stage(ast::PipelineStage::kCompute),
                               WorkgroupSize(1_i),
                           });

    Inspector& inspector = Build();
    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(1024u, result[0].workgroup_storage_size);
}

TEST_F(InspectorGetEntryPointTest, NoInOutVariables) {
    MakeEmptyBodyFunction("func", tint::Empty);

    MakeCallerBodyFunction("foo", Vector{std::string("func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].input_variables.size());
    EXPECT_EQ(0u, result[0].output_variables.size());
}

TEST_P(InspectorGetEntryPointComponentAndCompositionTest, Test) {
    ComponentType component;
    CompositionType composition;
    std::tie(component, composition) = GetParam();
    std::function<ast::Type()> tint_type = GetTypeFunction(component, composition);

    if (component == ComponentType::kF16) {
        Enable(core::Extension::kF16);
    }

    auto* in_var = Param("in_var", tint_type(),
                         Vector{
                             Location(0_u),
                             Flat(),
                         });
    Func("foo", Vector{in_var}, tint_type(),
         Vector{
             Return("in_var"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         },
         Vector{
             Location(0_u),
         });
    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());

    ASSERT_EQ(1u, result[0].input_variables.size());
    EXPECT_EQ("in_var", result[0].input_variables[0].name);
    EXPECT_TRUE(result[0].input_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].input_variables[0].location_attribute);
    EXPECT_EQ(component, result[0].input_variables[0].component_type);

    ASSERT_EQ(1u, result[0].output_variables.size());
    EXPECT_EQ("<retval>", result[0].output_variables[0].name);
    EXPECT_TRUE(result[0].output_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].output_variables[0].location_attribute);
    EXPECT_EQ(component, result[0].output_variables[0].component_type);
}
INSTANTIATE_TEST_SUITE_P(InspectorGetEntryPointTest,
                         InspectorGetEntryPointComponentAndCompositionTest,
                         testing::Combine(testing::Values(ComponentType::kF32,
                                                          ComponentType::kI32,
                                                          ComponentType::kU32,
                                                          ComponentType::kF16),
                                          testing::Values(CompositionType::kScalar,
                                                          CompositionType::kVec2,
                                                          CompositionType::kVec3,
                                                          CompositionType::kVec4)));

TEST_F(InspectorGetEntryPointTest, MultipleInOutVariables) {
    auto* in_var0 = Param("in_var0", ty.u32(),
                          Vector{
                              Location(0_u),
                              Flat(),
                          });
    auto* in_var1 = Param("in_var1", ty.u32(),
                          Vector{
                              Location(1_u),
                              Flat(),
                          });
    auto* in_var4 = Param("in_var4", ty.u32(),
                          Vector{
                              Location(4_u),
                              Flat(),
                          });
    Func("foo", Vector{in_var0, in_var1, in_var4}, ty.u32(),
         Vector{
             Return("in_var0"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         },
         Vector{
             Location(0_u),
         });
    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());

    ASSERT_EQ(3u, result[0].input_variables.size());
    EXPECT_EQ("in_var0", result[0].input_variables[0].name);
    EXPECT_TRUE(result[0].input_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].input_variables[0].location_attribute);
    EXPECT_EQ(InterpolationType::kFlat, result[0].input_variables[0].interpolation_type);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[0].component_type);
    EXPECT_EQ("in_var1", result[0].input_variables[1].name);
    EXPECT_TRUE(result[0].input_variables[1].has_location_attribute);
    EXPECT_EQ(1u, result[0].input_variables[1].location_attribute);
    EXPECT_EQ(InterpolationType::kFlat, result[0].input_variables[1].interpolation_type);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[1].component_type);
    EXPECT_EQ("in_var4", result[0].input_variables[2].name);
    EXPECT_TRUE(result[0].input_variables[2].has_location_attribute);
    EXPECT_EQ(4u, result[0].input_variables[2].location_attribute);
    EXPECT_EQ(InterpolationType::kFlat, result[0].input_variables[2].interpolation_type);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[2].component_type);

    ASSERT_EQ(1u, result[0].output_variables.size());
    EXPECT_EQ("<retval>", result[0].output_variables[0].name);
    EXPECT_TRUE(result[0].output_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].output_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].output_variables[0].component_type);
}

TEST_F(InspectorGetEntryPointTest, MultipleEntryPointsInOutVariables) {
    auto* in_var_foo = Param("in_var_foo", ty.u32(),
                             Vector{
                                 Location(0_u),
                                 Flat(),
                             });
    Func("foo", Vector{in_var_foo}, ty.u32(),
         Vector{
             Return("in_var_foo"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         },
         Vector{
             Location(0_u),
         });

    auto* in_var_bar = Param("in_var_bar", ty.u32(),
                             Vector{
                                 Location(0_u),
                                 Flat(),
                             });
    Func("bar", Vector{in_var_bar}, ty.u32(),
         Vector{
             Return("in_var_bar"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         },
         Vector{
             Location(1_u),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(2u, result.size());

    ASSERT_EQ(1u, result[0].input_variables.size());
    EXPECT_EQ("in_var_foo", result[0].input_variables[0].name);
    EXPECT_TRUE(result[0].input_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].input_variables[0].location_attribute);
    EXPECT_EQ(InterpolationType::kFlat, result[0].input_variables[0].interpolation_type);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[0].component_type);

    ASSERT_EQ(1u, result[0].output_variables.size());
    EXPECT_EQ("<retval>", result[0].output_variables[0].name);
    EXPECT_TRUE(result[0].output_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].output_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].output_variables[0].component_type);

    ASSERT_EQ(1u, result[1].input_variables.size());
    EXPECT_EQ("in_var_bar", result[1].input_variables[0].name);
    EXPECT_TRUE(result[1].input_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[1].input_variables[0].location_attribute);
    EXPECT_EQ(InterpolationType::kFlat, result[1].input_variables[0].interpolation_type);
    EXPECT_EQ(ComponentType::kU32, result[1].input_variables[0].component_type);

    ASSERT_EQ(1u, result[1].output_variables.size());
    EXPECT_EQ("<retval>", result[1].output_variables[0].name);
    EXPECT_TRUE(result[1].output_variables[0].has_location_attribute);
    EXPECT_EQ(1u, result[1].output_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[1].output_variables[0].component_type);
}

TEST_F(InspectorGetEntryPointTest, BuiltInsNotStageVariables) {
    auto* in_var0 = Param("in_var0", ty.u32(),
                          Vector{
                              Builtin(core::BuiltinValue::kSampleIndex),
                          });
    auto* in_var1 = Param("in_var1", ty.f32(),
                          Vector{
                              Location(0_u),
                          });
    Func("foo", Vector{in_var0, in_var1}, ty.f32(),
         Vector{
             Return("in_var1"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         },
         Vector{
             Builtin(core::BuiltinValue::kFragDepth),
         });
    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());

    ASSERT_EQ(1u, result[0].input_variables.size());
    EXPECT_EQ("in_var1", result[0].input_variables[0].name);
    EXPECT_TRUE(result[0].input_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].input_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kF32, result[0].input_variables[0].component_type);

    ASSERT_EQ(0u, result[0].output_variables.size());
}

TEST_F(InspectorGetEntryPointTest, InOutStruct) {
    auto* interface = MakeInOutStruct("interface", Vector{
                                                       InOutInfo{"a", 0u},
                                                       InOutInfo{"b", 1u},
                                                   });
    Func("foo",
         Vector{
             Param("param", ty.Of(interface)),
         },
         ty.Of(interface),
         Vector{
             Return("param"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });
    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());

    ASSERT_EQ(2u, result[0].input_variables.size());
    EXPECT_EQ("param.a", result[0].input_variables[0].name);
    EXPECT_TRUE(result[0].input_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].input_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[0].component_type);
    EXPECT_EQ("param.b", result[0].input_variables[1].name);
    EXPECT_TRUE(result[0].input_variables[1].has_location_attribute);
    EXPECT_EQ(1u, result[0].input_variables[1].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[1].component_type);

    ASSERT_EQ(2u, result[0].output_variables.size());
    EXPECT_EQ("<retval>.a", result[0].output_variables[0].name);
    EXPECT_TRUE(result[0].output_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].output_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].output_variables[0].component_type);
    EXPECT_EQ("<retval>.b", result[0].output_variables[1].name);
    EXPECT_TRUE(result[0].output_variables[1].has_location_attribute);
    EXPECT_EQ(1u, result[0].output_variables[1].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].output_variables[1].component_type);
}

TEST_F(InspectorGetEntryPointTest, MultipleEntryPointsInOutSharedStruct) {
    auto* interface = MakeInOutStruct("interface", Vector{
                                                       InOutInfo{"a", 0u},
                                                       InOutInfo{"b", 1u},
                                                   });
    Func("foo", tint::Empty, ty.Of(interface),
         Vector{
             Return(Call(ty.Of(interface))),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });
    Func("bar", Vector{Param("param", ty.Of(interface))}, ty.void_(), tint::Empty,
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });
    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(2u, result.size());

    ASSERT_EQ(0u, result[0].input_variables.size());

    ASSERT_EQ(2u, result[0].output_variables.size());
    EXPECT_EQ("<retval>.a", result[0].output_variables[0].name);
    EXPECT_TRUE(result[0].output_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].output_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].output_variables[0].component_type);
    EXPECT_EQ("<retval>.b", result[0].output_variables[1].name);
    EXPECT_TRUE(result[0].output_variables[1].has_location_attribute);
    EXPECT_EQ(1u, result[0].output_variables[1].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].output_variables[1].component_type);

    ASSERT_EQ(2u, result[1].input_variables.size());
    EXPECT_EQ("param.a", result[1].input_variables[0].name);
    EXPECT_TRUE(result[1].input_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[1].input_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[1].input_variables[0].component_type);
    EXPECT_EQ("param.b", result[1].input_variables[1].name);
    EXPECT_TRUE(result[1].input_variables[1].has_location_attribute);
    EXPECT_EQ(1u, result[1].input_variables[1].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[1].input_variables[1].component_type);

    ASSERT_EQ(0u, result[1].output_variables.size());
}

TEST_F(InspectorGetEntryPointTest, MixInOutVariablesAndStruct) {
    auto* struct_a = MakeInOutStruct("struct_a", Vector{
                                                     InOutInfo{"a", 0u},
                                                     InOutInfo{"b", 1u},
                                                 });
    auto* struct_b = MakeInOutStruct("struct_b", Vector{
                                                     InOutInfo{"a", 2u},
                                                 });
    Func("foo",
         Vector{
             Param("param_a", ty.Of(struct_a)),
             Param("param_b", ty.Of(struct_b)),
             Param("param_c", ty.f32(), Vector{Location(3_u)}),
             Param("param_d", ty.f32(), Vector{Location(4_u)}),
         },
         ty.Of(struct_a),
         Vector{
             Return("param_a"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });
    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());

    ASSERT_EQ(5u, result[0].input_variables.size());
    EXPECT_EQ("param_a.a", result[0].input_variables[0].name);
    EXPECT_TRUE(result[0].input_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].input_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[0].component_type);
    EXPECT_EQ("param_a.b", result[0].input_variables[1].name);
    EXPECT_TRUE(result[0].input_variables[1].has_location_attribute);
    EXPECT_EQ(1u, result[0].input_variables[1].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[1].component_type);
    EXPECT_EQ("param_b.a", result[0].input_variables[2].name);
    EXPECT_TRUE(result[0].input_variables[2].has_location_attribute);
    EXPECT_EQ(2u, result[0].input_variables[2].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].input_variables[2].component_type);
    EXPECT_EQ("param_c", result[0].input_variables[3].name);
    EXPECT_TRUE(result[0].input_variables[3].has_location_attribute);
    EXPECT_EQ(3u, result[0].input_variables[3].location_attribute);
    EXPECT_EQ(ComponentType::kF32, result[0].input_variables[3].component_type);
    EXPECT_EQ("param_d", result[0].input_variables[4].name);
    EXPECT_TRUE(result[0].input_variables[4].has_location_attribute);
    EXPECT_EQ(4u, result[0].input_variables[4].location_attribute);
    EXPECT_EQ(ComponentType::kF32, result[0].input_variables[4].component_type);

    ASSERT_EQ(2u, result[0].output_variables.size());
    EXPECT_EQ("<retval>.a", result[0].output_variables[0].name);
    EXPECT_TRUE(result[0].output_variables[0].has_location_attribute);
    EXPECT_EQ(0u, result[0].output_variables[0].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].output_variables[0].component_type);
    EXPECT_EQ("<retval>.b", result[0].output_variables[1].name);
    EXPECT_TRUE(result[0].output_variables[1].has_location_attribute);
    EXPECT_EQ(1u, result[0].output_variables[1].location_attribute);
    EXPECT_EQ(ComponentType::kU32, result[0].output_variables[1].component_type);
}

TEST_F(InspectorGetEntryPointTest, OverrideUnreferenced) {
    Override("foo", ty.f32());
    MakeEmptyBodyFunction("ep_func", Vector{
                                         Stage(ast::PipelineStage::kCompute),
                                         WorkgroupSize(1_i),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].overrides.size());
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedByEntryPoint) {
    Override("foo", ty.f32());
    MakePlainGlobalReferenceBodyFunction("ep_func", "foo", ty.f32(),
                                         Vector{
                                             Stage(ast::PipelineStage::kCompute),
                                             WorkgroupSize(1_i),
                                         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].overrides.size());
    EXPECT_EQ("foo", result[0].overrides[0].name);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedByCallee) {
    Override("foo", ty.f32());
    MakePlainGlobalReferenceBodyFunction("callee_func", "foo", ty.f32(), tint::Empty);
    MakeCallerBodyFunction("ep_func", Vector{std::string("callee_func")},
                           Vector{
                               Stage(ast::PipelineStage::kCompute),
                               WorkgroupSize(1_i),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].overrides.size());
    EXPECT_EQ("foo", result[0].overrides[0].name);
}

TEST_F(InspectorGetEntryPointTest, OverrideSomeReferenced) {
    Override("foo", ty.f32(), Id(1_a));
    Override("bar", ty.f32(), Id(2_a));
    MakePlainGlobalReferenceBodyFunction("callee_func", "foo", ty.f32(), tint::Empty);
    MakeCallerBodyFunction("ep_func", Vector{std::string("callee_func")},
                           Vector{
                               Stage(ast::PipelineStage::kCompute),
                               WorkgroupSize(1_i),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].overrides.size());
    EXPECT_EQ("foo", result[0].overrides[0].name);
    EXPECT_EQ(1, result[0].overrides[0].id.value);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedIndirectly) {
    Override("foo", ty.f32());
    Override("bar", ty.f32(), Mul(2_a, "foo"));
    MakePlainGlobalReferenceBodyFunction("ep_func", "bar", ty.f32(),
                                         Vector{
                                             Stage(ast::PipelineStage::kCompute),
                                             WorkgroupSize(1_i),
                                         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(2u, result[0].overrides.size());
    EXPECT_EQ("bar", result[0].overrides[0].name);
    EXPECT_TRUE(result[0].overrides[0].is_initialized);
    EXPECT_EQ("foo", result[0].overrides[1].name);
    EXPECT_FALSE(result[0].overrides[1].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedIndirectly_ViaPrivateInitializer) {
    Override("foo", ty.f32());
    GlobalVar("bar", core::AddressSpace::kPrivate, ty.f32(), Mul(2_a, "foo"));
    MakePlainGlobalReferenceBodyFunction("ep_func", "bar", ty.f32(),
                                         Vector{
                                             Stage(ast::PipelineStage::kCompute),
                                             WorkgroupSize(1_i),
                                         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].overrides.size());
    EXPECT_EQ("foo", result[0].overrides[0].name);
    EXPECT_FALSE(result[0].overrides[0].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedIndirectly_MultipleEntryPoints) {
    Override("foo1", ty.f32());
    Override("bar1", ty.f32(), Mul(2_a, "foo1"));
    MakePlainGlobalReferenceBodyFunction("ep_func1", "bar1", ty.f32(),
                                         Vector{
                                             Stage(ast::PipelineStage::kCompute),
                                             WorkgroupSize(1_i),
                                         });
    Override("foo2", ty.f32());
    Override("bar2", ty.f32(), Mul(2_a, "foo2"));
    MakePlainGlobalReferenceBodyFunction("ep_func2", "bar2", ty.f32(),
                                         Vector{
                                             Stage(ast::PipelineStage::kCompute),
                                             WorkgroupSize(1_i),
                                         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(2u, result.size());

    ASSERT_EQ(2u, result[0].overrides.size());
    EXPECT_EQ("bar1", result[0].overrides[0].name);
    EXPECT_TRUE(result[0].overrides[0].is_initialized);
    EXPECT_EQ("foo1", result[0].overrides[1].name);
    EXPECT_FALSE(result[0].overrides[1].is_initialized);

    ASSERT_EQ(2u, result[1].overrides.size());
    EXPECT_EQ("bar2", result[1].overrides[0].name);
    EXPECT_TRUE(result[1].overrides[0].is_initialized);
    EXPECT_EQ("foo2", result[1].overrides[1].name);
    EXPECT_FALSE(result[1].overrides[1].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedByAttribute) {
    Override("wgsize", ty.u32());
    MakeEmptyBodyFunction("ep_func", Vector{
                                         Stage(ast::PipelineStage::kCompute),
                                         WorkgroupSize("wgsize"),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].overrides.size());
    EXPECT_EQ("wgsize", result[0].overrides[0].name);
    EXPECT_FALSE(result[0].overrides[0].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedByAttributeIndirectly) {
    Override("foo", ty.u32());
    Override("bar", ty.u32(), Mul(2_a, "foo"));
    MakeEmptyBodyFunction("ep_func", Vector{
                                         Stage(ast::PipelineStage::kCompute),
                                         WorkgroupSize(Mul(2_a, Expr("bar"))),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(2u, result[0].overrides.size());
    EXPECT_EQ("bar", result[0].overrides[0].name);
    EXPECT_TRUE(result[0].overrides[0].is_initialized);
    EXPECT_EQ("foo", result[0].overrides[1].name);
    EXPECT_FALSE(result[0].overrides[1].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedByArraySize) {
    Override("size", ty.u32());
    GlobalVar("v", core::AddressSpace::kWorkgroup, ty.array(ty.f32(), "size"));
    Func("ep", tint::Empty, ty.void_(),
         Vector{
             Assign(Phony(), IndexAccessor("v", 0_a)),
         },
         Vector{
             Stage(ast::PipelineStage::kCompute),
             WorkgroupSize(1_i),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].overrides.size());
    EXPECT_EQ("size", result[0].overrides[0].name);
    EXPECT_FALSE(result[0].overrides[0].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedByArraySizeIndirectly) {
    Override("foo", ty.u32());
    Override("bar", ty.u32(), Mul(2_a, "foo"));
    GlobalVar("v", core::AddressSpace::kWorkgroup, ty.array(ty.f32(), Mul(2_a, Expr("bar"))));
    Func("ep", tint::Empty, ty.void_(),
         Vector{
             Assign(Phony(), IndexAccessor("v", 0_a)),
         },
         Vector{
             Stage(ast::PipelineStage::kCompute),
             WorkgroupSize(1_i),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(2u, result[0].overrides.size());
    EXPECT_EQ("bar", result[0].overrides[0].name);
    EXPECT_TRUE(result[0].overrides[0].is_initialized);
    EXPECT_EQ("foo", result[0].overrides[1].name);
    EXPECT_FALSE(result[0].overrides[1].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideReferencedByArraySizeViaAlias) {
    Override("foo", ty.u32());
    Override("bar", ty.u32(), Expr("foo"));
    Alias("MyArray", ty.array(ty.f32(), Mul(2_a, Expr("bar"))));
    Override("zoo", ty.u32());
    Alias("MyArrayUnused", ty.array(ty.f32(), Mul(2_a, Expr("zoo"))));
    GlobalVar("v", core::AddressSpace::kWorkgroup, ty("MyArray"));
    Func("ep", tint::Empty, ty.void_(),
         Vector{
             Assign(Phony(), IndexAccessor("v", 0_a)),
         },
         Vector{
             Stage(ast::PipelineStage::kCompute),
             WorkgroupSize(1_i),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(2u, result[0].overrides.size());
    EXPECT_EQ("bar", result[0].overrides[0].name);
    EXPECT_TRUE(result[0].overrides[0].is_initialized);
    EXPECT_EQ("foo", result[0].overrides[1].name);
    EXPECT_FALSE(result[0].overrides[1].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideTypes) {
    Enable(core::Extension::kF16);

    Override("bool_var", ty.bool_());
    Override("float_var", ty.f32());
    Override("u32_var", ty.u32());
    Override("i32_var", ty.i32());
    Override("f16_var", ty.f16());

    MakePlainGlobalReferenceBodyFunction("bool_func", "bool_var", ty.bool_(), tint::Empty);
    MakePlainGlobalReferenceBodyFunction("float_func", "float_var", ty.f32(), tint::Empty);
    MakePlainGlobalReferenceBodyFunction("u32_func", "u32_var", ty.u32(), tint::Empty);
    MakePlainGlobalReferenceBodyFunction("i32_func", "i32_var", ty.i32(), tint::Empty);
    MakePlainGlobalReferenceBodyFunction("f16_func", "f16_var", ty.f16(), tint::Empty);

    MakeCallerBodyFunction(
        "ep_func",
        Vector{std::string("bool_func"), "float_func", "u32_func", "i32_func", "f16_func"},
        Vector{
            Stage(ast::PipelineStage::kCompute),
            WorkgroupSize(1_i),
        });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(5u, result[0].overrides.size());
    EXPECT_EQ("bool_var", result[0].overrides[0].name);
    EXPECT_EQ(inspector::Override::Type::kBool, result[0].overrides[0].type);
    EXPECT_EQ("float_var", result[0].overrides[1].name);
    EXPECT_EQ(inspector::Override::Type::kFloat32, result[0].overrides[1].type);
    EXPECT_EQ("u32_var", result[0].overrides[2].name);
    EXPECT_EQ(inspector::Override::Type::kUint32, result[0].overrides[2].type);
    EXPECT_EQ("i32_var", result[0].overrides[3].name);
    EXPECT_EQ(inspector::Override::Type::kInt32, result[0].overrides[3].type);
    EXPECT_EQ("f16_var", result[0].overrides[4].name);
    EXPECT_EQ(inspector::Override::Type::kFloat16, result[0].overrides[4].type);
}

TEST_F(InspectorGetEntryPointTest, OverrideInitialized) {
    Override("foo", ty.f32(), Expr(0_f));
    MakePlainGlobalReferenceBodyFunction("ep_func", "foo", ty.f32(),
                                         Vector{
                                             Stage(ast::PipelineStage::kCompute),
                                             WorkgroupSize(1_i),
                                         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].overrides.size());
    EXPECT_EQ("foo", result[0].overrides[0].name);
    EXPECT_TRUE(result[0].overrides[0].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideUninitialized) {
    Override("foo", ty.f32());
    MakePlainGlobalReferenceBodyFunction("ep_func", "foo", ty.f32(),
                                         Vector{
                                             Stage(ast::PipelineStage::kCompute),
                                             WorkgroupSize(1_i),
                                         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].overrides.size());
    EXPECT_EQ("foo", result[0].overrides[0].name);

    EXPECT_FALSE(result[0].overrides[0].is_initialized);
}

TEST_F(InspectorGetEntryPointTest, OverrideNumericIDSpecified) {
    Override("foo_no_id", ty.f32());
    Override("foo_id", ty.f32(), Id(1234_a));

    MakePlainGlobalReferenceBodyFunction("no_id_func", "foo_no_id", ty.f32(), tint::Empty);
    MakePlainGlobalReferenceBodyFunction("id_func", "foo_id", ty.f32(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("no_id_func"), "id_func"},
                           Vector{
                               Stage(ast::PipelineStage::kCompute),
                               WorkgroupSize(1_i),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(2u, result[0].overrides.size());
    EXPECT_EQ("foo_no_id", result[0].overrides[0].name);
    EXPECT_EQ("foo_id", result[0].overrides[1].name);
    EXPECT_EQ(1234, result[0].overrides[1].id.value);

    EXPECT_FALSE(result[0].overrides[0].is_id_specified);
    EXPECT_TRUE(result[0].overrides[1].is_id_specified);
}

TEST_F(InspectorGetEntryPointTest, NonOverrideSkipped) {
    auto* foo_struct_type = MakeUniformBufferType("foo_type", Vector{
                                                                  ty.i32(),
                                                              });
    AddUniformBuffer("foo_ub", ty.Of(foo_struct_type), 0, 0);
    MakeStructVariableReferenceBodyFunction("ub_func", "foo_ub",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });
    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].overrides.size());
}

TEST_F(InspectorGetEntryPointTest, BuiltinNotReferenced) {
    MakeEmptyBodyFunction("ep_func", Vector{
                                         Stage(ast::PipelineStage::kFragment),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_FALSE(result[0].input_sample_mask_used);
    EXPECT_FALSE(result[0].output_sample_mask_used);
    EXPECT_FALSE(result[0].input_position_used);
    EXPECT_FALSE(result[0].front_facing_used);
    EXPECT_FALSE(result[0].sample_index_used);
    EXPECT_FALSE(result[0].num_workgroups_used);
    EXPECT_FALSE(result[0].frag_depth_used);
}

TEST_F(InspectorGetEntryPointTest, InputSampleMaskSimpleReferenced) {
    auto* in_var = Param("in_var", ty.u32(),
                         Vector{
                             Builtin(core::BuiltinValue::kSampleMask),
                         });
    Func("ep_func", Vector{in_var}, ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].input_sample_mask_used);
}

TEST_F(InspectorGetEntryPointTest, InputSampleMaskStructReferenced) {
    Vector members{
        Member("inner_position", ty.u32(), Vector{Builtin(core::BuiltinValue::kSampleMask)}),
    };

    Structure("in_struct", members);

    Func("ep_func",
         Vector{
             Param("in_var", ty("in_struct"), tint::Empty),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].input_sample_mask_used);
}

TEST_F(InspectorGetEntryPointTest, OutputSampleMaskSimpleReferenced) {
    Func("ep_func",
         Vector{
             Param("in_var", ty.u32(), Vector{Builtin(core::BuiltinValue::kSampleMask)}),
         },
         ty.u32(),
         Vector{
             Return("in_var"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         },
         Vector{
             Builtin(core::BuiltinValue::kSampleMask),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].output_sample_mask_used);
}

TEST_F(InspectorGetEntryPointTest, OutputSampleMaskStructReferenced) {
    Structure("out_struct", Vector{
                                Member("inner_sample_mask", ty.u32(),
                                       Vector{Builtin(core::BuiltinValue::kSampleMask)}),
                            });

    Func("ep_func", tint::Empty, ty("out_struct"),
         Vector{
             Decl(Var("out_var", ty("out_struct"))),
             Return("out_var"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].output_sample_mask_used);
}

TEST_F(InspectorGetEntryPointTest, InputPositionSimpleReferenced) {
    Func("ep_func",
         Vector{
             Param("in_var", ty.vec4<f32>(), Vector{Builtin(core::BuiltinValue::kPosition)}),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].input_position_used);
}

TEST_F(InspectorGetEntryPointTest, InputPositionStructReferenced) {
    Structure("in_struct", Vector{
                               Member("inner_position", ty.vec4<f32>(),
                                      Vector{Builtin(core::BuiltinValue::kPosition)}),
                           });

    Func("ep_func",
         Vector{
             Param("in_var", ty("in_struct"), tint::Empty),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].input_position_used);
}

TEST_F(InspectorGetEntryPointTest, FrontFacingSimpleReferenced) {
    Func("ep_func",
         Vector{
             Param("in_var", ty.bool_(), Vector{Builtin(core::BuiltinValue::kFrontFacing)}),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].front_facing_used);
}

TEST_F(InspectorGetEntryPointTest, FrontFacingStructReferenced) {
    Structure("in_struct", Vector{
                               Member("inner_position", ty.bool_(),
                                      Vector{Builtin(core::BuiltinValue::kFrontFacing)}),
                           });

    Func("ep_func",
         Vector{
             Param("in_var", ty("in_struct"), tint::Empty),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].front_facing_used);
}

TEST_F(InspectorGetEntryPointTest, SampleIndexSimpleReferenced) {
    Func("ep_func",
         Vector{
             Param("in_var", ty.u32(), Vector{Builtin(core::BuiltinValue::kSampleIndex)}),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].sample_index_used);
}

TEST_F(InspectorGetEntryPointTest, SampleIndexStructReferenced) {
    Structure("in_struct", Vector{
                               Member("inner_position", ty.u32(),
                                      Vector{Builtin(core::BuiltinValue::kSampleIndex)}),
                           });

    Func("ep_func",
         Vector{
             Param("in_var", ty("in_struct"), tint::Empty),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].sample_index_used);
}

TEST_F(InspectorGetEntryPointTest, NumWorkgroupsSimpleReferenced) {
    Func("ep_func",
         Vector{
             Param("in_var", ty.vec3<u32>(), Vector{Builtin(core::BuiltinValue::kNumWorkgroups)}),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{Stage(ast::PipelineStage::kCompute), WorkgroupSize(1_i)}, tint::Empty);

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].num_workgroups_used);
}

TEST_F(InspectorGetEntryPointTest, NumWorkgroupsStructReferenced) {
    Structure("in_struct", Vector{
                               Member("inner_position", ty.vec3<u32>(),
                                      Vector{Builtin(core::BuiltinValue::kNumWorkgroups)}),
                           });

    Func("ep_func",
         Vector{
             Param("in_var", ty("in_struct"), tint::Empty),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{Stage(ast::PipelineStage::kCompute), WorkgroupSize(1_i)}, tint::Empty);

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].num_workgroups_used);
}

TEST_F(InspectorGetEntryPointTest, FragDepthSimpleReferenced) {
    Func("ep_func", {}, ty.f32(),
         Vector{
             Return(Expr(0_f)),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         },
         Vector{
             Builtin(core::BuiltinValue::kFragDepth),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].frag_depth_used);
}

TEST_F(InspectorGetEntryPointTest, FragDepthStructReferenced) {
    Structure("out_struct", Vector{
                                Member("inner_frag_depth", ty.f32(),
                                       Vector{Builtin(core::BuiltinValue::kFragDepth)}),
                            });

    Func("ep_func", tint::Empty, ty("out_struct"),
         Vector{
             Decl(Var("out_var", ty("out_struct"))),
             Return("out_var"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    EXPECT_TRUE(result[0].frag_depth_used);
}

TEST_F(InspectorGetEntryPointTest, ImplicitInterpolate) {
    Structure("in_struct", Vector{
                               Member("struct_inner", ty.f32(), Vector{Location(0_a)}),
                           });

    Func("ep_func",
         Vector{
             Param("in_var", ty("in_struct"), tint::Empty),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].input_variables.size());
    EXPECT_EQ(InterpolationType::kPerspective, result[0].input_variables[0].interpolation_type);
    EXPECT_EQ(InterpolationSampling::kCenter, result[0].input_variables[0].interpolation_sampling);
}

TEST_F(InspectorGetEntryPointTest, PixelLocalMemberDefault) {
    // @fragment fn foo() {}
    MakeEmptyBodyFunction("foo", Vector{
                                     Stage(ast::PipelineStage::kFragment),
                                 });

    Inspector& inspector = Build();
    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].pixel_local_members.size());
}

TEST_F(InspectorGetEntryPointTest, PixelLocalMemberTypes) {
    // enable chromium_experimental_pixel_local;
    // struct Ure {
    //   toto : u32;
    //   titi : f32;
    //   tata: i32;
    //   tonton : u32; // Check having the same type multiple times
    // }
    // var<pixel_local> pls : Ure;
    // @fragment fn foo() {  _ = pls; }

    Enable(core::Extension::kChromiumExperimentalPixelLocal);
    Structure("Ure", Vector{
                         Member("toto", ty.u32()),
                         Member("titi", ty.f32()),
                         Member("tata", ty.i32()),
                         Member("tonton", ty.u32()),
                     });
    GlobalVar("pls", core::AddressSpace::kPixelLocal, ty("Ure"));
    Func("foo", tint::Empty, ty.void_(),
         Vector{
             Assign(Phony(), "pls"),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();
    auto result = inspector.GetEntryPoints();
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(4u, result[0].pixel_local_members.size());
    ASSERT_EQ(PixelLocalMemberType::kU32, result[0].pixel_local_members[0]);
    ASSERT_EQ(PixelLocalMemberType::kF32, result[0].pixel_local_members[1]);
    ASSERT_EQ(PixelLocalMemberType::kI32, result[0].pixel_local_members[2]);
    ASSERT_EQ(PixelLocalMemberType::kU32, result[0].pixel_local_members[3]);
}

TEST_P(InspectorGetEntryPointInterpolateTest, Test) {
    auto& params = GetParam();
    Structure("in_struct",
              Vector{
                  Member("struct_inner", ty.f32(),
                         Vector{Interpolate(params.in_type, params.in_sampling), Location(0_a)}),
              });

    Func("ep_func",
         Vector{
             Param("in_var", ty("in_struct"), tint::Empty),
         },
         ty.void_(),
         Vector{
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetEntryPoints();

    ASSERT_EQ(1u, result.size());
    ASSERT_EQ(1u, result[0].input_variables.size());
    EXPECT_EQ(params.out_type, result[0].input_variables[0].interpolation_type);
    EXPECT_EQ(params.out_sampling, result[0].input_variables[0].interpolation_sampling);
}

INSTANTIATE_TEST_SUITE_P(
    InspectorGetEntryPointTest,
    InspectorGetEntryPointInterpolateTest,
    testing::Values(
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kPerspective, core::InterpolationSampling::kCenter,
            InterpolationType::kPerspective, InterpolationSampling::kCenter},
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kPerspective, core::InterpolationSampling::kCentroid,
            InterpolationType::kPerspective, InterpolationSampling::kCentroid},
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kPerspective, core::InterpolationSampling::kSample,
            InterpolationType::kPerspective, InterpolationSampling::kSample},
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kPerspective, core::InterpolationSampling::kUndefined,
            InterpolationType::kPerspective, InterpolationSampling::kCenter},
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kLinear, core::InterpolationSampling::kCenter,
            InterpolationType::kLinear, InterpolationSampling::kCenter},
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kLinear, core::InterpolationSampling::kCentroid,
            InterpolationType::kLinear, InterpolationSampling::kCentroid},
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kLinear, core::InterpolationSampling::kSample,
            InterpolationType::kLinear, InterpolationSampling::kSample},
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kLinear, core::InterpolationSampling::kUndefined,
            InterpolationType::kLinear, InterpolationSampling::kCenter},
        InspectorGetEntryPointInterpolateTestParams{
            core::InterpolationType::kFlat, core::InterpolationSampling::kUndefined,
            InterpolationType::kFlat, InterpolationSampling::kNone}));

TEST_F(InspectorGetOverrideDefaultValuesTest, Bool) {
    GlobalConst("C", Expr(true));
    Override("a", ty.bool_(), Id(1_a));
    Override("b", ty.bool_(), Expr(true), Id(20_a));
    Override("c", Expr(false), Id(300_a));
    Override("d", Or(true, false), Id(400_a));
    Override("e", Expr("C"), Id(500_a));

    Inspector& inspector = Build();

    auto result = inspector.GetOverrideDefaultValues();
    ASSERT_EQ(5u, result.size());

    ASSERT_TRUE(result.find(OverrideId{1}) != result.end());
    EXPECT_TRUE(result[OverrideId{1}].IsNull());

    ASSERT_TRUE(result.find(OverrideId{20}) != result.end());
    EXPECT_TRUE(result[OverrideId{20}].IsBool());
    EXPECT_TRUE(result[OverrideId{20}].AsBool());

    ASSERT_TRUE(result.find(OverrideId{300}) != result.end());
    EXPECT_TRUE(result[OverrideId{300}].IsBool());
    EXPECT_FALSE(result[OverrideId{300}].AsBool());

    ASSERT_TRUE(result.find(OverrideId{400}) != result.end());
    EXPECT_TRUE(result[OverrideId{400}].IsBool());
    EXPECT_TRUE(result[OverrideId{400}].AsBool());

    ASSERT_TRUE(result.find(OverrideId{500}) != result.end());
    EXPECT_TRUE(result[OverrideId{500}].IsBool());
    EXPECT_TRUE(result[OverrideId{500}].AsBool());
}

TEST_F(InspectorGetOverrideDefaultValuesTest, U32) {
    GlobalConst("C", Expr(100_u));
    Override("a", ty.u32(), Id(1_a));
    Override("b", ty.u32(), Expr(42_u), Id(20_a));
    Override("c", ty.u32(), Expr(42_a), Id(30_a));
    Override("d", ty.u32(), Add(42_a, 10_a), Id(40_a));
    Override("e", Add(42_a, 10_u), Id(50_a));
    Override("f", Expr("C"), Id(60_a));

    Inspector& inspector = Build();

    auto result = inspector.GetOverrideDefaultValues();
    ASSERT_EQ(6u, result.size());

    ASSERT_TRUE(result.find(OverrideId{1}) != result.end());
    EXPECT_TRUE(result[OverrideId{1}].IsNull());

    ASSERT_TRUE(result.find(OverrideId{20}) != result.end());
    EXPECT_TRUE(result[OverrideId{20}].IsU32());
    EXPECT_EQ(42u, result[OverrideId{20}].AsU32());

    ASSERT_TRUE(result.find(OverrideId{30}) != result.end());
    EXPECT_TRUE(result[OverrideId{30}].IsU32());
    EXPECT_EQ(42u, result[OverrideId{30}].AsU32());

    ASSERT_TRUE(result.find(OverrideId{40}) != result.end());
    EXPECT_TRUE(result[OverrideId{40}].IsU32());
    EXPECT_EQ(52u, result[OverrideId{40}].AsU32());

    ASSERT_TRUE(result.find(OverrideId{50}) != result.end());
    EXPECT_TRUE(result[OverrideId{50}].IsU32());
    EXPECT_EQ(52u, result[OverrideId{50}].AsU32());

    ASSERT_TRUE(result.find(OverrideId{60}) != result.end());
    EXPECT_TRUE(result[OverrideId{60}].IsU32());
    EXPECT_EQ(100u, result[OverrideId{60}].AsU32());
}

TEST_F(InspectorGetOverrideDefaultValuesTest, I32) {
    GlobalConst("C", Expr(100_a));
    Override("a", ty.i32(), Id(1_a));
    Override("b", ty.i32(), Expr(-42_i), Id(20_a));
    Override("c", ty.i32(), Expr(42_i), Id(300_a));
    Override("d", Expr(42_a), Id(400_a));
    Override("e", Add(42_a, 7_a), Id(500_a));
    Override("f", Expr("C"), Id(6000_a));

    Inspector& inspector = Build();

    auto result = inspector.GetOverrideDefaultValues();
    ASSERT_EQ(6u, result.size());

    ASSERT_TRUE(result.find(OverrideId{1}) != result.end());
    EXPECT_TRUE(result[OverrideId{1}].IsNull());

    ASSERT_TRUE(result.find(OverrideId{20}) != result.end());
    EXPECT_TRUE(result[OverrideId{20}].IsI32());
    EXPECT_EQ(-42, result[OverrideId{20}].AsI32());

    ASSERT_TRUE(result.find(OverrideId{300}) != result.end());
    EXPECT_TRUE(result[OverrideId{300}].IsI32());
    EXPECT_EQ(42, result[OverrideId{300}].AsI32());

    ASSERT_TRUE(result.find(OverrideId{400}) != result.end());
    EXPECT_TRUE(result[OverrideId{400}].IsI32());
    EXPECT_EQ(42, result[OverrideId{400}].AsI32());

    ASSERT_TRUE(result.find(OverrideId{500}) != result.end());
    EXPECT_TRUE(result[OverrideId{500}].IsI32());
    EXPECT_EQ(49, result[OverrideId{500}].AsI32());

    ASSERT_TRUE(result.find(OverrideId{6000}) != result.end());
    EXPECT_TRUE(result[OverrideId{6000}].IsI32());
    EXPECT_EQ(100, result[OverrideId{6000}].AsI32());
}

TEST_F(InspectorGetOverrideDefaultValuesTest, F32) {
    Override("a", ty.f32(), Id(1_a));
    Override("b", ty.f32(), Expr(0_f), Id(20_a));
    Override("c", ty.f32(), Expr(-10_f), Id(300_a));
    Override("d", Expr(15_f), Id(4000_a));
    Override("3", Expr(42.0_a), Id(5000_a));
    Override("e", ty.f32(), Mul(15_f, 10_a), Id(6000_a));

    Inspector& inspector = Build();

    auto result = inspector.GetOverrideDefaultValues();
    ASSERT_EQ(6u, result.size());

    ASSERT_TRUE(result.find(OverrideId{1}) != result.end());
    EXPECT_TRUE(result[OverrideId{1}].IsNull());

    ASSERT_TRUE(result.find(OverrideId{20}) != result.end());
    EXPECT_TRUE(result[OverrideId{20}].IsFloat());
    EXPECT_FLOAT_EQ(0.0f, result[OverrideId{20}].AsFloat());

    ASSERT_TRUE(result.find(OverrideId{300}) != result.end());
    EXPECT_TRUE(result[OverrideId{300}].IsFloat());
    EXPECT_FLOAT_EQ(-10.0f, result[OverrideId{300}].AsFloat());

    ASSERT_TRUE(result.find(OverrideId{4000}) != result.end());
    EXPECT_TRUE(result[OverrideId{4000}].IsFloat());
    EXPECT_FLOAT_EQ(15.0f, result[OverrideId{4000}].AsFloat());

    ASSERT_TRUE(result.find(OverrideId{5000}) != result.end());
    EXPECT_TRUE(result[OverrideId{5000}].IsFloat());
    EXPECT_FLOAT_EQ(42.0f, result[OverrideId{5000}].AsFloat());

    ASSERT_TRUE(result.find(OverrideId{6000}) != result.end());
    EXPECT_TRUE(result[OverrideId{6000}].IsFloat());
    EXPECT_FLOAT_EQ(150.0f, result[OverrideId{6000}].AsFloat());
}

TEST_F(InspectorGetOverrideDefaultValuesTest, F16) {
    Enable(core::Extension::kF16);

    Override("a", ty.f16(), Id(1_a));
    Override("b", ty.f16(), Expr(0_h), Id(20_a));
    Override("c", ty.f16(), Expr(-10_h), Id(300_a));
    Override("d", Expr(15_h), Id(4000_a));
    Override("3", Expr(42.0_h), Id(5000_a));
    Override("e", ty.f16(), Mul(15_h, 10_a), Id(6000_a));

    Inspector& inspector = Build();

    auto result = inspector.GetOverrideDefaultValues();
    ASSERT_EQ(6u, result.size());

    ASSERT_TRUE(result.find(OverrideId{1}) != result.end());
    EXPECT_TRUE(result[OverrideId{1}].IsNull());

    ASSERT_TRUE(result.find(OverrideId{20}) != result.end());
    // Default value of f16 override is also stored as float scalar.
    EXPECT_TRUE(result[OverrideId{20}].IsFloat());
    EXPECT_FLOAT_EQ(0.0f, result[OverrideId{20}].AsFloat());

    ASSERT_TRUE(result.find(OverrideId{300}) != result.end());
    EXPECT_TRUE(result[OverrideId{300}].IsFloat());
    EXPECT_FLOAT_EQ(-10.0f, result[OverrideId{300}].AsFloat());

    ASSERT_TRUE(result.find(OverrideId{4000}) != result.end());
    EXPECT_TRUE(result[OverrideId{4000}].IsFloat());
    EXPECT_FLOAT_EQ(15.0f, result[OverrideId{4000}].AsFloat());

    ASSERT_TRUE(result.find(OverrideId{5000}) != result.end());
    EXPECT_TRUE(result[OverrideId{5000}].IsFloat());
    EXPECT_FLOAT_EQ(42.0f, result[OverrideId{5000}].AsFloat());

    ASSERT_TRUE(result.find(OverrideId{6000}) != result.end());
    EXPECT_TRUE(result[OverrideId{6000}].IsFloat());
    EXPECT_FLOAT_EQ(150.0f, result[OverrideId{6000}].AsFloat());
}

TEST_F(InspectorGetConstantNameToIdMapTest, WithAndWithoutIds) {
    Override("v1", ty.f32(), Id(1_a));
    Override("v20", ty.f32(), Id(20_a));
    Override("v300", ty.f32(), Id(300_a));
    auto* a = Override("a", ty.f32());
    auto* b = Override("b", ty.f32());
    auto* c = Override("c", ty.f32());

    Inspector& inspector = Build();

    auto result = inspector.GetNamedOverrideIds();
    ASSERT_EQ(6u, result.size());

    ASSERT_TRUE(result.count("v1"));
    EXPECT_EQ(result["v1"].value, 1u);

    ASSERT_TRUE(result.count("v20"));
    EXPECT_EQ(result["v20"].value, 20u);

    ASSERT_TRUE(result.count("v300"));
    EXPECT_EQ(result["v300"].value, 300u);

    ASSERT_TRUE(result.count("a"));
    ASSERT_TRUE(program_->Sem().Get(a));
    EXPECT_EQ(result["a"], program_->Sem().Get(a)->OverrideId());

    ASSERT_TRUE(result.count("b"));
    ASSERT_TRUE(program_->Sem().Get(b));
    EXPECT_EQ(result["b"], program_->Sem().Get(b)->OverrideId());

    ASSERT_TRUE(result.count("c"));
    ASSERT_TRUE(program_->Sem().Get(c));
    EXPECT_EQ(result["c"], program_->Sem().Get(c)->OverrideId());
}

TEST_F(InspectorGetResourceBindingsTest, Empty) {
    MakeCallerBodyFunction("ep_func", tint::Empty,
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(0u, result.size());
}

TEST_F(InspectorGetResourceBindingsTest, Simple) {
    auto* ub_struct_type = MakeUniformBufferType("ub_type", Vector{
                                                                ty.i32(),
                                                            });
    AddUniformBuffer("ub_var", ty.Of(ub_struct_type), 0, 0);
    MakeStructVariableReferenceBodyFunction("ub_func", "ub_var",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    auto sb = MakeStorageBufferTypes("sb_type", Vector{
                                                    ty.i32(),
                                                });
    AddStorageBuffer("sb_var", sb(), core::Access::kReadWrite, 1, 0);
    MakeStructVariableReferenceBodyFunction("sb_func", "sb_var",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    auto ro_sb = MakeStorageBufferTypes("rosb_type", Vector{
                                                         ty.i32(),
                                                     });
    AddStorageBuffer("rosb_var", ro_sb(), core::Access::kRead, 1, 1);
    MakeStructVariableReferenceBodyFunction("rosb_func", "rosb_var",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    auto s_texture_type = ty.sampled_texture(core::type::TextureDimension::k1d, ty.f32());
    AddResource("s_texture", s_texture_type, 2, 0);
    AddSampler("s_var", 3, 0);
    AddGlobalVariable("s_coords", ty.f32());
    MakeSamplerReferenceBodyFunction("s_func", "s_texture", "s_var", "s_coords", ty.f32(),
                                     tint::Empty);

    auto cs_depth_texture_type = ty.depth_texture(core::type::TextureDimension::k2d);
    AddResource("cs_texture", cs_depth_texture_type, 3, 1);
    AddComparisonSampler("cs_var", 3, 2);
    AddGlobalVariable("cs_coords", ty.vec2<f32>());
    AddGlobalVariable("cs_depth", ty.f32());
    MakeComparisonSamplerReferenceBodyFunction("cs_func", "cs_texture", "cs_var", "cs_coords",
                                               "cs_depth", ty.f32(), tint::Empty);

    auto depth_ms_texture_type = ty.depth_multisampled_texture(core::type::TextureDimension::k2d);
    AddResource("depth_ms_texture", depth_ms_texture_type, 3, 3);
    Func("depth_ms_func", tint::Empty, ty.void_(),
         Vector{
             Ignore("depth_ms_texture"),
         });

    auto st_type = MakeStorageTextureTypes(core::type::TextureDimension::k2d,
                                           core::TexelFormat::kR32Uint, core::Access::kWrite);
    AddStorageTexture("st_var", st_type, 4, 0);
    MakeStorageTextureBodyFunction("st_func", "st_var", ty.vec2<u32>(), tint::Empty);

    MakeCallerBodyFunction("ep_func",
                           Vector{
                               std::string("ub_func"),
                               std::string("sb_func"),
                               std::string("rosb_func"),
                               std::string("s_func"),
                               std::string("cs_func"),
                               std::string("depth_ms_func"),
                               std::string("st_func"),
                           },
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(9u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[1].resource_type);
    EXPECT_EQ(1u, result[1].bind_group);
    EXPECT_EQ(0u, result[1].binding);

    EXPECT_EQ(ResourceBinding::ResourceType::kReadOnlyStorageBuffer, result[2].resource_type);
    EXPECT_EQ(1u, result[2].bind_group);
    EXPECT_EQ(1u, result[2].binding);

    EXPECT_EQ(ResourceBinding::ResourceType::kSampler, result[3].resource_type);
    EXPECT_EQ(3u, result[3].bind_group);
    EXPECT_EQ(0u, result[3].binding);

    EXPECT_EQ(ResourceBinding::ResourceType::kComparisonSampler, result[4].resource_type);
    EXPECT_EQ(3u, result[4].bind_group);
    EXPECT_EQ(2u, result[4].binding);

    EXPECT_EQ(ResourceBinding::ResourceType::kSampledTexture, result[5].resource_type);
    EXPECT_EQ(2u, result[5].bind_group);
    EXPECT_EQ(0u, result[5].binding);

    EXPECT_EQ(ResourceBinding::ResourceType::kWriteOnlyStorageTexture, result[6].resource_type);
    EXPECT_EQ(4u, result[6].bind_group);
    EXPECT_EQ(0u, result[6].binding);

    EXPECT_EQ(ResourceBinding::ResourceType::kDepthTexture, result[7].resource_type);
    EXPECT_EQ(3u, result[7].bind_group);
    EXPECT_EQ(1u, result[7].binding);

    EXPECT_EQ(ResourceBinding::ResourceType::kDepthMultisampledTexture, result[8].resource_type);
    EXPECT_EQ(3u, result[8].bind_group);
    EXPECT_EQ(3u, result[8].binding);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, MissingEntryPoint) {
    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ep_func");
    ASSERT_TRUE(inspector.has_error());
    std::string error = inspector.error();
    EXPECT_TRUE(error.find("not found") != std::string::npos);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, NonEntryPointFunc) {
    auto* foo_struct_type = MakeUniformBufferType("foo_type", Vector{
                                                                  ty.i32(),
                                                              });
    AddUniformBuffer("foo_ub", ty.Of(foo_struct_type), 0, 0);

    MakeStructVariableReferenceBodyFunction("ub_func", "foo_ub",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ub_func");
    std::string error = inspector.error();
    EXPECT_TRUE(error.find("not an entry point") != std::string::npos);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, Simple_NonStruct) {
    AddUniformBuffer("foo_ub", ty.i32(), 0, 0);
    MakePlainGlobalReferenceBodyFunction("ub_func", "foo_ub", ty.i32(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(4u, result[0].size);
    EXPECT_EQ(4u, result[0].size_no_padding);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, Simple_Struct) {
    auto* foo_struct_type = MakeUniformBufferType("foo_type", Vector{
                                                                  ty.i32(),
                                                              });
    AddUniformBuffer("foo_ub", ty.Of(foo_struct_type), 0, 0);

    MakeStructVariableReferenceBodyFunction("ub_func", "foo_ub",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(4u, result[0].size);
    EXPECT_EQ(4u, result[0].size_no_padding);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, MultipleMembers) {
    auto* foo_struct_type = MakeUniformBufferType("foo_type", Vector{
                                                                  ty.i32(),
                                                                  ty.u32(),
                                                                  ty.f32(),
                                                              });
    AddUniformBuffer("foo_ub", ty.Of(foo_struct_type), 0, 0);

    MakeStructVariableReferenceBodyFunction("ub_func", "foo_ub",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                                MemberInfo{1, ty.u32()},
                                                MemberInfo{2, ty.f32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(12u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, ContainingPadding) {
    auto* foo_struct_type = MakeUniformBufferType("foo_type", Vector{
                                                                  ty.vec3<f32>(),
                                                              });
    AddUniformBuffer("foo_ub", ty.Of(foo_struct_type), 0, 0);

    MakeStructVariableReferenceBodyFunction("ub_func", "foo_ub",
                                            Vector{
                                                MemberInfo{0, ty.vec3<f32>()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(16u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, NonStructVec3) {
    AddUniformBuffer("foo_ub", ty.vec3<f32>(), 0, 0);
    MakePlainGlobalReferenceBodyFunction("ub_func", "foo_ub", ty.vec3<f32>(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(12u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, MultipleUniformBuffers) {
    auto* ub_struct_type = MakeUniformBufferType("ub_type", Vector{
                                                                ty.i32(),
                                                                ty.u32(),
                                                                ty.f32(),
                                                            });
    AddUniformBuffer("ub_foo", ty.Of(ub_struct_type), 0, 0);
    AddUniformBuffer("ub_bar", ty.Of(ub_struct_type), 0, 1);
    AddUniformBuffer("ub_baz", ty.Of(ub_struct_type), 2, 0);

    auto AddReferenceFunc = [this](const std::string& func_name, const std::string& var_name) {
        MakeStructVariableReferenceBodyFunction(func_name, var_name,
                                                Vector{
                                                    MemberInfo{0, ty.i32()},
                                                    MemberInfo{1, ty.u32()},
                                                    MemberInfo{2, ty.f32()},
                                                });
    };
    AddReferenceFunc("ub_foo_func", "ub_foo");
    AddReferenceFunc("ub_bar_func", "ub_bar");
    AddReferenceFunc("ub_baz_func", "ub_baz");

    auto FuncCall = [&](const std::string& callee) { return CallStmt(Call(callee)); };

    Func("ep_func", tint::Empty, ty.void_(),
         Vector{
             FuncCall("ub_foo_func"),
             FuncCall("ub_bar_func"),
             FuncCall("ub_baz_func"),
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(3u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(12u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[1].resource_type);
    EXPECT_EQ(0u, result[1].bind_group);
    EXPECT_EQ(1u, result[1].binding);
    EXPECT_EQ(12u, result[1].size);
    EXPECT_EQ(12u, result[1].size_no_padding);

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[2].resource_type);
    EXPECT_EQ(2u, result[2].bind_group);
    EXPECT_EQ(0u, result[2].binding);
    EXPECT_EQ(12u, result[2].size);
    EXPECT_EQ(12u, result[2].size_no_padding);
}

TEST_F(InspectorGetUniformBufferResourceBindingsTest, ContainingArray) {
    // Manually create uniform buffer to make sure it had a valid layout (array
    // with elem stride of 16, and that is 16-byte aligned within the struct)
    auto* foo_struct_type = Structure("foo_type", Vector{
                                                      Member("0i32", ty.i32()),
                                                      Member("b",
                                                             ty.array<u32, 4>(Vector{
                                                                 Stride(16),
                                                             }),
                                                             Vector{
                                                                 MemberAlign(16_i),
                                                             }),
                                                  });

    AddUniformBuffer("foo_ub", ty.Of(foo_struct_type), 0, 0);

    MakeStructVariableReferenceBodyFunction("ub_func", "foo_ub",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetUniformBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kUniformBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(80u, result[0].size);
    EXPECT_EQ(80u, result[0].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, Simple_NonStruct) {
    AddStorageBuffer("foo_sb", ty.i32(), core::Access::kReadWrite, 0, 0);
    MakePlainGlobalReferenceBodyFunction("sb_func", "foo_sb", ty.i32(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(4u, result[0].size);
    EXPECT_EQ(4u, result[0].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, Simple_Struct) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kReadWrite, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(4u, result[0].size);
    EXPECT_EQ(4u, result[0].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, MultipleMembers) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                                  ty.u32(),
                                                                  ty.f32(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kReadWrite, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                                MemberInfo{1, ty.u32()},
                                                MemberInfo{2, ty.f32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(12u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, MultipleStorageBuffers) {
    auto sb_struct_type = MakeStorageBufferTypes("sb_type", Vector{
                                                                ty.i32(),
                                                                ty.u32(),
                                                                ty.f32(),
                                                            });
    AddStorageBuffer("sb_foo", sb_struct_type(), core::Access::kReadWrite, 0, 0);
    AddStorageBuffer("sb_bar", sb_struct_type(), core::Access::kReadWrite, 0, 1);
    AddStorageBuffer("sb_baz", sb_struct_type(), core::Access::kReadWrite, 2, 0);

    auto AddReferenceFunc = [this](const std::string& func_name, const std::string& var_name) {
        MakeStructVariableReferenceBodyFunction(func_name, var_name,
                                                Vector{
                                                    MemberInfo{0, ty.i32()},
                                                    MemberInfo{1, ty.u32()},
                                                    MemberInfo{2, ty.f32()},
                                                });
    };
    AddReferenceFunc("sb_foo_func", "sb_foo");
    AddReferenceFunc("sb_bar_func", "sb_bar");
    AddReferenceFunc("sb_baz_func", "sb_baz");

    auto FuncCall = [&](const std::string& callee) { return CallStmt(Call(callee)); };

    Func("ep_func", tint::Empty, ty.void_(),
         Vector{
             FuncCall("sb_foo_func"),
             FuncCall("sb_bar_func"),
             FuncCall("sb_baz_func"),
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(3u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(12u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[1].resource_type);
    EXPECT_EQ(0u, result[1].bind_group);
    EXPECT_EQ(1u, result[1].binding);
    EXPECT_EQ(12u, result[1].size);
    EXPECT_EQ(12u, result[1].size_no_padding);

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[2].resource_type);
    EXPECT_EQ(2u, result[2].bind_group);
    EXPECT_EQ(0u, result[2].binding);
    EXPECT_EQ(12u, result[2].size);
    EXPECT_EQ(12u, result[2].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, ContainingArray) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                                  ty.array<u32, 4>(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kReadWrite, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(20u, result[0].size);
    EXPECT_EQ(20u, result[0].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, ContainingRuntimeArray) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                                  ty.array<u32>(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kReadWrite, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(8u, result[0].size);
    EXPECT_EQ(8u, result[0].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, ContainingPadding) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.vec3<f32>(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kReadWrite, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.vec3<f32>()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(16u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, NonStructVec3) {
    AddStorageBuffer("foo_ub", ty.vec3<f32>(), core::Access::kReadWrite, 0, 0);
    MakePlainGlobalReferenceBodyFunction("ub_func", "foo_ub", ty.vec3<f32>(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("ub_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(12u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);
}

TEST_F(InspectorGetStorageBufferResourceBindingsTest, SkipReadOnly) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kRead, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(0u, result.size());
}

TEST_F(InspectorGetReadOnlyStorageBufferResourceBindingsTest, Simple) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kRead, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetReadOnlyStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kReadOnlyStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(4u, result[0].size);
    EXPECT_EQ(4u, result[0].size_no_padding);
}

TEST_F(InspectorGetReadOnlyStorageBufferResourceBindingsTest, MultipleStorageBuffers) {
    auto sb_struct_type = MakeStorageBufferTypes("sb_type", Vector{
                                                                ty.i32(),
                                                                ty.u32(),
                                                                ty.f32(),
                                                            });
    AddStorageBuffer("sb_foo", sb_struct_type(), core::Access::kRead, 0, 0);
    AddStorageBuffer("sb_bar", sb_struct_type(), core::Access::kRead, 0, 1);
    AddStorageBuffer("sb_baz", sb_struct_type(), core::Access::kRead, 2, 0);

    auto AddReferenceFunc = [this](const std::string& func_name, const std::string& var_name) {
        MakeStructVariableReferenceBodyFunction(func_name, var_name,
                                                Vector{
                                                    MemberInfo{0, ty.i32()},
                                                    MemberInfo{1, ty.u32()},
                                                    MemberInfo{2, ty.f32()},
                                                });
    };
    AddReferenceFunc("sb_foo_func", "sb_foo");
    AddReferenceFunc("sb_bar_func", "sb_bar");
    AddReferenceFunc("sb_baz_func", "sb_baz");

    auto FuncCall = [&](const std::string& callee) { return CallStmt(Call(callee)); };

    Func("ep_func", tint::Empty, ty.void_(),
         Vector{
             FuncCall("sb_foo_func"),
             FuncCall("sb_bar_func"),
             FuncCall("sb_baz_func"),
             Return(),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetReadOnlyStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(3u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kReadOnlyStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(12u, result[0].size);
    EXPECT_EQ(12u, result[0].size_no_padding);

    EXPECT_EQ(ResourceBinding::ResourceType::kReadOnlyStorageBuffer, result[1].resource_type);
    EXPECT_EQ(0u, result[1].bind_group);
    EXPECT_EQ(1u, result[1].binding);
    EXPECT_EQ(12u, result[1].size);
    EXPECT_EQ(12u, result[1].size_no_padding);

    EXPECT_EQ(ResourceBinding::ResourceType::kReadOnlyStorageBuffer, result[2].resource_type);
    EXPECT_EQ(2u, result[2].bind_group);
    EXPECT_EQ(0u, result[2].binding);
    EXPECT_EQ(12u, result[2].size);
    EXPECT_EQ(12u, result[2].size_no_padding);
}

TEST_F(InspectorGetReadOnlyStorageBufferResourceBindingsTest, ContainingArray) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                                  ty.array<u32, 4>(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kRead, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetReadOnlyStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kReadOnlyStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(20u, result[0].size);
    EXPECT_EQ(20u, result[0].size_no_padding);
}

TEST_F(InspectorGetReadOnlyStorageBufferResourceBindingsTest, ContainingRuntimeArray) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                                  ty.array<u32>(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kRead, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetReadOnlyStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kReadOnlyStorageBuffer, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(8u, result[0].size);
    EXPECT_EQ(8u, result[0].size_no_padding);
}

TEST_F(InspectorGetReadOnlyStorageBufferResourceBindingsTest, SkipNonReadOnly) {
    auto foo_struct_type = MakeStorageBufferTypes("foo_type", Vector{
                                                                  ty.i32(),
                                                              });
    AddStorageBuffer("foo_sb", foo_struct_type(), core::Access::kReadWrite, 0, 0);

    MakeStructVariableReferenceBodyFunction("sb_func", "foo_sb",
                                            Vector{
                                                MemberInfo{0, ty.i32()},
                                            });

    MakeCallerBodyFunction("ep_func", Vector{std::string("sb_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetReadOnlyStorageBufferResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(0u, result.size());
}

TEST_F(InspectorGetSamplerResourceBindingsTest, Simple) {
    auto sampled_texture_type = ty.sampled_texture(core::type::TextureDimension::k1d, ty.f32());
    AddResource("foo_texture", sampled_texture_type, 0, 0);
    AddSampler("foo_sampler", 0, 1);
    AddGlobalVariable("foo_coords", ty.f32());

    MakeSamplerReferenceBodyFunction("ep", "foo_texture", "foo_sampler", "foo_coords", ty.f32(),
                                     Vector{
                                         Stage(ast::PipelineStage::kFragment),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetSamplerResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(ResourceBinding::ResourceType::kSampler, result[0].resource_type);
    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(1u, result[0].binding);
}

TEST_F(InspectorGetSamplerResourceBindingsTest, NoSampler) {
    MakeEmptyBodyFunction("ep_func", Vector{
                                         Stage(ast::PipelineStage::kFragment),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetSamplerResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(0u, result.size());
}

TEST_F(InspectorGetSamplerResourceBindingsTest, InFunction) {
    auto sampled_texture_type = ty.sampled_texture(core::type::TextureDimension::k1d, ty.f32());
    AddResource("foo_texture", sampled_texture_type, 0, 0);
    AddSampler("foo_sampler", 0, 1);
    AddGlobalVariable("foo_coords", ty.f32());

    MakeSamplerReferenceBodyFunction("foo_func", "foo_texture", "foo_sampler", "foo_coords",
                                     ty.f32(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("foo_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetSamplerResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(ResourceBinding::ResourceType::kSampler, result[0].resource_type);
    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(1u, result[0].binding);
}

TEST_F(InspectorGetSamplerResourceBindingsTest, UnknownEntryPoint) {
    auto sampled_texture_type = ty.sampled_texture(core::type::TextureDimension::k1d, ty.f32());
    AddResource("foo_texture", sampled_texture_type, 0, 0);
    AddSampler("foo_sampler", 0, 1);
    AddGlobalVariable("foo_coords", ty.f32());

    MakeSamplerReferenceBodyFunction("ep", "foo_texture", "foo_sampler", "foo_coords", ty.f32(),
                                     Vector{
                                         Stage(ast::PipelineStage::kFragment),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetSamplerResourceBindings("foo");
    ASSERT_TRUE(inspector.has_error()) << inspector.error();
}

TEST_F(InspectorGetSamplerResourceBindingsTest, SkipsComparisonSamplers) {
    auto depth_texture_type = ty.depth_texture(core::type::TextureDimension::k2d);
    AddResource("foo_texture", depth_texture_type, 0, 0);
    AddComparisonSampler("foo_sampler", 0, 1);
    AddGlobalVariable("foo_coords", ty.vec2<f32>());
    AddGlobalVariable("foo_depth", ty.f32());

    MakeComparisonSamplerReferenceBodyFunction("ep", "foo_texture", "foo_sampler", "foo_coords",
                                               "foo_depth", ty.f32(),
                                               Vector{
                                                   Stage(ast::PipelineStage::kFragment),
                                               });

    Inspector& inspector = Build();

    auto result = inspector.GetSamplerResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(0u, result.size());
}

TEST_F(InspectorGetComparisonSamplerResourceBindingsTest, Simple) {
    auto depth_texture_type = ty.depth_texture(core::type::TextureDimension::k2d);
    AddResource("foo_texture", depth_texture_type, 0, 0);
    AddComparisonSampler("foo_sampler", 0, 1);
    AddGlobalVariable("foo_coords", ty.vec2<f32>());
    AddGlobalVariable("foo_depth", ty.f32());

    MakeComparisonSamplerReferenceBodyFunction("ep", "foo_texture", "foo_sampler", "foo_coords",
                                               "foo_depth", ty.f32(),
                                               Vector{
                                                   Stage(ast::PipelineStage::kFragment),
                                               });

    Inspector& inspector = Build();

    auto result = inspector.GetComparisonSamplerResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(ResourceBinding::ResourceType::kComparisonSampler, result[0].resource_type);
    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(1u, result[0].binding);
}

TEST_F(InspectorGetComparisonSamplerResourceBindingsTest, NoSampler) {
    MakeEmptyBodyFunction("ep_func", Vector{
                                         Stage(ast::PipelineStage::kFragment),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetComparisonSamplerResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(0u, result.size());
}

TEST_F(InspectorGetComparisonSamplerResourceBindingsTest, InFunction) {
    auto depth_texture_type = ty.depth_texture(core::type::TextureDimension::k2d);
    AddResource("foo_texture", depth_texture_type, 0, 0);
    AddComparisonSampler("foo_sampler", 0, 1);
    AddGlobalVariable("foo_coords", ty.vec2<f32>());
    AddGlobalVariable("foo_depth", ty.f32());

    MakeComparisonSamplerReferenceBodyFunction("foo_func", "foo_texture", "foo_sampler",
                                               "foo_coords", "foo_depth", ty.f32(), tint::Empty);

    MakeCallerBodyFunction("ep_func", Vector{std::string("foo_func")},
                           Vector{
                               Stage(ast::PipelineStage::kFragment),
                           });

    Inspector& inspector = Build();

    auto result = inspector.GetComparisonSamplerResourceBindings("ep_func");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(ResourceBinding::ResourceType::kComparisonSampler, result[0].resource_type);
    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(1u, result[0].binding);
}

TEST_F(InspectorGetComparisonSamplerResourceBindingsTest, UnknownEntryPoint) {
    auto depth_texture_type = ty.depth_texture(core::type::TextureDimension::k2d);
    AddResource("foo_texture", depth_texture_type, 0, 0);
    AddComparisonSampler("foo_sampler", 0, 1);
    AddGlobalVariable("foo_coords", ty.vec2<f32>());
    AddGlobalVariable("foo_depth", ty.f32());

    MakeComparisonSamplerReferenceBodyFunction("ep", "foo_texture", "foo_sampler", "foo_coords",
                                               "foo_depth", ty.f32(),
                                               Vector{
                                                   Stage(ast::PipelineStage::kFragment),
                                               });

    Inspector& inspector = Build();

    auto result = inspector.GetSamplerResourceBindings("foo");
    ASSERT_TRUE(inspector.has_error()) << inspector.error();
}

TEST_F(InspectorGetComparisonSamplerResourceBindingsTest, SkipsSamplers) {
    auto sampled_texture_type = ty.sampled_texture(core::type::TextureDimension::k1d, ty.f32());
    AddResource("foo_texture", sampled_texture_type, 0, 0);
    AddSampler("foo_sampler", 0, 1);
    AddGlobalVariable("foo_coords", ty.f32());

    MakeSamplerReferenceBodyFunction("ep", "foo_texture", "foo_sampler", "foo_coords", ty.f32(),
                                     Vector{
                                         Stage(ast::PipelineStage::kFragment),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetComparisonSamplerResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(0u, result.size());
}

TEST_F(InspectorGetSampledTextureResourceBindingsTest, Empty) {
    MakeEmptyBodyFunction("foo", Vector{
                                     Stage(ast::PipelineStage::kFragment),
                                 });

    Inspector& inspector = Build();

    auto result = inspector.GetSampledTextureResourceBindings("foo");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(0u, result.size());
}

TEST_P(InspectorGetSampledTextureResourceBindingsTestWithParam, textureSample) {
    ast::Type sampled_texture_type =
        ty.sampled_texture(GetParam().type_dim, GetBaseType(GetParam().sampled_kind));
    AddResource("foo_texture", sampled_texture_type, 0, 0);
    AddSampler("foo_sampler", 0, 1);
    ast::Type coord_type = GetCoordsType(GetParam().type_dim, ty.f32());
    AddGlobalVariable("foo_coords", coord_type);

    MakeSamplerReferenceBodyFunction("ep", "foo_texture", "foo_sampler", "foo_coords",
                                     GetBaseType(GetParam().sampled_kind),
                                     Vector{
                                         Stage(ast::PipelineStage::kFragment),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetSampledTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(ResourceBinding::ResourceType::kSampledTexture, result[0].resource_type);
    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(GetParam().inspector_dim, result[0].dim);
    EXPECT_EQ(GetParam().sampled_kind, result[0].sampled_kind);

    // Prove that sampled and multi-sampled bindings are accounted
    // for separately.
    auto multisampled_result = inspector.GetMultisampledTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_TRUE(multisampled_result.empty());
}

INSTANTIATE_TEST_SUITE_P(
    InspectorGetSampledTextureResourceBindingsTest,
    InspectorGetSampledTextureResourceBindingsTestWithParam,
    testing::Values(GetSampledTextureTestParams{core::type::TextureDimension::k1d,
                                                inspector::ResourceBinding::TextureDimension::k1d,
                                                inspector::ResourceBinding::SampledKind::kFloat},
                    GetSampledTextureTestParams{core::type::TextureDimension::k2d,
                                                inspector::ResourceBinding::TextureDimension::k2d,
                                                inspector::ResourceBinding::SampledKind::kFloat},
                    GetSampledTextureTestParams{core::type::TextureDimension::k3d,
                                                inspector::ResourceBinding::TextureDimension::k3d,
                                                inspector::ResourceBinding::SampledKind::kFloat},
                    GetSampledTextureTestParams{core::type::TextureDimension::kCube,
                                                inspector::ResourceBinding::TextureDimension::kCube,
                                                inspector::ResourceBinding::SampledKind::kFloat}));

TEST_P(InspectorGetSampledArrayTextureResourceBindingsTestWithParam, textureSample) {
    ast::Type sampled_texture_type =
        ty.sampled_texture(GetParam().type_dim, GetBaseType(GetParam().sampled_kind));
    AddResource("foo_texture", sampled_texture_type, 0, 0);
    AddSampler("foo_sampler", 0, 1);
    ast::Type coord_type = GetCoordsType(GetParam().type_dim, ty.f32());
    AddGlobalVariable("foo_coords", coord_type);
    AddGlobalVariable("foo_array_index", ty.i32());

    MakeSamplerReferenceBodyFunction("ep", "foo_texture", "foo_sampler", "foo_coords",
                                     "foo_array_index", GetBaseType(GetParam().sampled_kind),
                                     Vector{
                                         Stage(ast::PipelineStage::kFragment),
                                     });

    Inspector& inspector = Build();

    auto result = inspector.GetSampledTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(ResourceBinding::ResourceType::kSampledTexture, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(GetParam().inspector_dim, result[0].dim);
    EXPECT_EQ(GetParam().sampled_kind, result[0].sampled_kind);
}

INSTANTIATE_TEST_SUITE_P(
    InspectorGetSampledArrayTextureResourceBindingsTest,
    InspectorGetSampledArrayTextureResourceBindingsTestWithParam,
    testing::Values(
        GetSampledTextureTestParams{core::type::TextureDimension::k2dArray,
                                    inspector::ResourceBinding::TextureDimension::k2dArray,
                                    inspector::ResourceBinding::SampledKind::kFloat},
        GetSampledTextureTestParams{core::type::TextureDimension::kCubeArray,
                                    inspector::ResourceBinding::TextureDimension::kCubeArray,
                                    inspector::ResourceBinding::SampledKind::kFloat}));

TEST_P(InspectorGetMultisampledTextureResourceBindingsTestWithParam, textureLoad) {
    ast::Type multisampled_texture_type =
        ty.multisampled_texture(GetParam().type_dim, GetBaseType(GetParam().sampled_kind));
    AddResource("foo_texture", multisampled_texture_type, 0, 0);
    ast::Type coord_type = GetCoordsType(GetParam().type_dim, ty.i32());
    AddGlobalVariable("foo_coords", coord_type);
    AddGlobalVariable("foo_sample_index", ty.i32());

    Func("ep", tint::Empty, ty.void_(),
         Vector{
             Assign(Phony(), Call("textureLoad", "foo_texture", "foo_coords", "foo_sample_index")),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetMultisampledTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(ResourceBinding::ResourceType::kMultisampledTexture, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(GetParam().inspector_dim, result[0].dim);
    EXPECT_EQ(GetParam().sampled_kind, result[0].sampled_kind);

    // Prove that sampled and multi-sampled bindings are accounted
    // for separately.
    auto single_sampled_result = inspector.GetSampledTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_TRUE(single_sampled_result.empty());
}

INSTANTIATE_TEST_SUITE_P(
    InspectorGetMultisampledTextureResourceBindingsTest,
    InspectorGetMultisampledTextureResourceBindingsTestWithParam,
    testing::Values(
        GetMultisampledTextureTestParams{core::type::TextureDimension::k2d,
                                         inspector::ResourceBinding::TextureDimension::k2d,
                                         inspector::ResourceBinding::SampledKind::kFloat},
        GetMultisampledTextureTestParams{core::type::TextureDimension::k2d,
                                         inspector::ResourceBinding::TextureDimension::k2d,
                                         inspector::ResourceBinding::SampledKind::kSInt},
        GetMultisampledTextureTestParams{core::type::TextureDimension::k2d,
                                         inspector::ResourceBinding::TextureDimension::k2d,
                                         inspector::ResourceBinding::SampledKind::kUInt}));

TEST_F(InspectorGetMultisampledArrayTextureResourceBindingsTest, Empty) {
    MakeEmptyBodyFunction("foo", Vector{
                                     Stage(ast::PipelineStage::kFragment),
                                 });

    Inspector& inspector = Build();

    auto result = inspector.GetSampledTextureResourceBindings("foo");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(0u, result.size());
}

TEST_F(InspectorGetStorageTextureResourceBindingsTest, Empty) {
    MakeEmptyBodyFunction("ep", Vector{
                                    Stage(ast::PipelineStage::kFragment),
                                });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    EXPECT_EQ(0u, result.size());
}

TEST_P(InspectorGetStorageTextureResourceBindingsTestWithParam, Simple) {
    DimensionParams dim_params;
    TexelFormatParams format_params;
    core::Access access;
    std::tie(dim_params, format_params, access) = GetParam();

    core::type::TextureDimension dim;
    ResourceBinding::TextureDimension expected_dim;
    std::tie(dim, expected_dim) = dim_params;

    core::TexelFormat format;
    ResourceBinding::TexelFormat expected_format;
    ResourceBinding::SampledKind expected_kind;
    std::tie(format, expected_format, expected_kind) = format_params;

    ResourceBinding::ResourceType expectedResourceType;
    switch (access) {
        case core::Access::kWrite:
            expectedResourceType = ResourceBinding::ResourceType::kWriteOnlyStorageTexture;
            break;
        case core::Access::kRead:
            Enable(core::Extension::kChromiumExperimentalReadWriteStorageTexture);
            expectedResourceType = ResourceBinding::ResourceType::kReadOnlyStorageTexture;
            break;
        case core::Access::kReadWrite:
            Enable(core::Extension::kChromiumExperimentalReadWriteStorageTexture);
            expectedResourceType = ResourceBinding::ResourceType::kReadWriteStorageTexture;
            break;
        case core::Access::kUndefined:
            ASSERT_TRUE(false);
            break;
    }

    ast::Type st_type = MakeStorageTextureTypes(dim, format, access);
    AddStorageTexture("st_var", st_type, 0, 0);

    ast::Type dim_type;
    switch (dim) {
        case core::type::TextureDimension::k1d:
            dim_type = ty.u32();
            break;
        case core::type::TextureDimension::k2d:
        case core::type::TextureDimension::k2dArray:
            dim_type = ty.vec2<u32>();
            break;
        case core::type::TextureDimension::k3d:
            dim_type = ty.vec3<u32>();
            break;
        default:
            break;
    }

    ASSERT_FALSE(dim_type == nullptr);

    MakeStorageTextureBodyFunction("ep", "st_var", dim_type,
                                   Vector{
                                       Stage(ast::PipelineStage::kFragment),
                                   });

    Inspector& inspector = Build();

    auto result = inspector.GetStorageTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    ASSERT_EQ(1u, result.size());

    EXPECT_EQ(expectedResourceType, result[0].resource_type);
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(expected_dim, result[0].dim);
    EXPECT_EQ(expected_format, result[0].image_format);
    EXPECT_EQ(expected_kind, result[0].sampled_kind);
}

INSTANTIATE_TEST_SUITE_P(
    InspectorGetStorageTextureResourceBindingsTest,
    InspectorGetStorageTextureResourceBindingsTestWithParam,
    testing::Combine(
        testing::Values(std::make_tuple(core::type::TextureDimension::k1d,
                                        ResourceBinding::TextureDimension::k1d),
                        std::make_tuple(core::type::TextureDimension::k2d,
                                        ResourceBinding::TextureDimension::k2d),
                        std::make_tuple(core::type::TextureDimension::k2dArray,
                                        ResourceBinding::TextureDimension::k2dArray),
                        std::make_tuple(core::type::TextureDimension::k3d,
                                        ResourceBinding::TextureDimension::k3d)),
        testing::Values(std::make_tuple(core::TexelFormat::kR32Float,
                                        ResourceBinding::TexelFormat::kR32Float,
                                        ResourceBinding::SampledKind::kFloat),
                        std::make_tuple(core::TexelFormat::kR32Sint,
                                        ResourceBinding::TexelFormat::kR32Sint,
                                        ResourceBinding::SampledKind::kSInt),
                        std::make_tuple(core::TexelFormat::kR32Uint,
                                        ResourceBinding::TexelFormat::kR32Uint,
                                        ResourceBinding::SampledKind::kUInt),
                        std::make_tuple(core::TexelFormat::kRg32Float,
                                        ResourceBinding::TexelFormat::kRg32Float,
                                        ResourceBinding::SampledKind::kFloat),
                        std::make_tuple(core::TexelFormat::kRg32Sint,
                                        ResourceBinding::TexelFormat::kRg32Sint,
                                        ResourceBinding::SampledKind::kSInt),
                        std::make_tuple(core::TexelFormat::kRg32Uint,
                                        ResourceBinding::TexelFormat::kRg32Uint,
                                        ResourceBinding::SampledKind::kUInt),
                        std::make_tuple(core::TexelFormat::kRgba16Float,
                                        ResourceBinding::TexelFormat::kRgba16Float,
                                        ResourceBinding::SampledKind::kFloat),
                        std::make_tuple(core::TexelFormat::kRgba16Sint,
                                        ResourceBinding::TexelFormat::kRgba16Sint,
                                        ResourceBinding::SampledKind::kSInt),
                        std::make_tuple(core::TexelFormat::kRgba16Uint,
                                        ResourceBinding::TexelFormat::kRgba16Uint,
                                        ResourceBinding::SampledKind::kUInt),
                        std::make_tuple(core::TexelFormat::kRgba32Float,
                                        ResourceBinding::TexelFormat::kRgba32Float,
                                        ResourceBinding::SampledKind::kFloat),
                        std::make_tuple(core::TexelFormat::kRgba32Sint,
                                        ResourceBinding::TexelFormat::kRgba32Sint,
                                        ResourceBinding::SampledKind::kSInt),
                        std::make_tuple(core::TexelFormat::kRgba32Uint,
                                        ResourceBinding::TexelFormat::kRgba32Uint,
                                        ResourceBinding::SampledKind::kUInt),
                        std::make_tuple(core::TexelFormat::kRgba8Sint,
                                        ResourceBinding::TexelFormat::kRgba8Sint,
                                        ResourceBinding::SampledKind::kSInt),
                        std::make_tuple(core::TexelFormat::kRgba8Snorm,
                                        ResourceBinding::TexelFormat::kRgba8Snorm,
                                        ResourceBinding::SampledKind::kFloat),
                        std::make_tuple(core::TexelFormat::kRgba8Uint,
                                        ResourceBinding::TexelFormat::kRgba8Uint,
                                        ResourceBinding::SampledKind::kUInt),
                        std::make_tuple(core::TexelFormat::kRgba8Unorm,
                                        ResourceBinding::TexelFormat::kRgba8Unorm,
                                        ResourceBinding::SampledKind::kFloat)),
        testing::Values(core::Access::kRead, core::Access::kWrite, core::Access::kReadWrite)));

TEST_P(InspectorGetDepthTextureResourceBindingsTestWithParam, textureDimensions) {
    auto depth_texture_type = ty.depth_texture(GetParam().type_dim);
    AddResource("dt", depth_texture_type, 0, 0);

    Func("ep", tint::Empty, ty.void_(),
         Vector{
             Assign(Phony(), Call("textureDimensions", "dt")),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetDepthTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(ResourceBinding::ResourceType::kDepthTexture, result[0].resource_type);
    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(GetParam().inspector_dim, result[0].dim);
}

INSTANTIATE_TEST_SUITE_P(
    InspectorGetDepthTextureResourceBindingsTest,
    InspectorGetDepthTextureResourceBindingsTestWithParam,
    testing::Values(
        GetDepthTextureTestParams{core::type::TextureDimension::k2d,
                                  inspector::ResourceBinding::TextureDimension::k2d},
        GetDepthTextureTestParams{core::type::TextureDimension::k2dArray,
                                  inspector::ResourceBinding::TextureDimension::k2dArray},
        GetDepthTextureTestParams{core::type::TextureDimension::kCube,
                                  inspector::ResourceBinding::TextureDimension::kCube},
        GetDepthTextureTestParams{core::type::TextureDimension::kCubeArray,
                                  inspector::ResourceBinding::TextureDimension::kCubeArray}));

TEST_F(InspectorGetDepthMultisampledTextureResourceBindingsTest, textureDimensions) {
    auto depth_ms_texture_type = ty.depth_multisampled_texture(core::type::TextureDimension::k2d);
    AddResource("tex", depth_ms_texture_type, 0, 0);

    Func("ep", tint::Empty, ty.void_(),
         Vector{
             Assign(Phony(), Call("textureDimensions", "tex")),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetDepthMultisampledTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ(ResourceBinding::ResourceType::kDepthMultisampledTexture, result[0].resource_type);
    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
    EXPECT_EQ(ResourceBinding::TextureDimension::k2d, result[0].dim);
}

TEST_F(InspectorGetExternalTextureResourceBindingsTest, Simple) {
    auto external_texture_type = ty.external_texture();
    AddResource("et", external_texture_type, 0, 0);

    Func("ep", tint::Empty, ty.void_(),
         Vector{
             Assign(Phony(), Call("textureDimensions", "et")),
         },
         Vector{
             Stage(ast::PipelineStage::kFragment),
         });

    Inspector& inspector = Build();

    auto result = inspector.GetExternalTextureResourceBindings("ep");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();
    EXPECT_EQ(ResourceBinding::ResourceType::kExternalTexture, result[0].resource_type);

    ASSERT_EQ(1u, result.size());
    EXPECT_EQ(0u, result[0].bind_group);
    EXPECT_EQ(0u, result[0].binding);
}

TEST_F(InspectorGetSamplerTextureUsesTest, None) {
    std::string shader = R"(
@fragment
fn main() {
})";

    Inspector& inspector = Initialize(shader);
    auto result = inspector.GetSamplerTextureUses("main");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(0u, result.Length());
}

TEST_F(InspectorGetSamplerTextureUsesTest, Simple) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;

@fragment
fn main(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return textureSample(myTexture, mySampler, fragUV) * fragPosition;
})";

    Inspector& inspector = Initialize(shader);
    auto result = inspector.GetSamplerTextureUses("main");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.Length());

    EXPECT_EQ(0u, result[0].sampler_binding_point.group);
    EXPECT_EQ(1u, result[0].sampler_binding_point.binding);
    EXPECT_EQ(0u, result[0].texture_binding_point.group);
    EXPECT_EQ(2u, result[0].texture_binding_point.binding);
}

TEST_F(InspectorGetSamplerTextureUsesTest, UnknownEntryPoint) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;

@fragment
fn main(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return textureSample(myTexture, mySampler, fragUV) * fragPosition;
})";

    Inspector& inspector = Initialize(shader);
    inspector.GetSamplerTextureUses("foo");
    ASSERT_TRUE(inspector.has_error()) << inspector.error();
}

TEST_F(InspectorGetSamplerTextureUsesTest, MultipleCalls) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;

@fragment
fn main(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return textureSample(myTexture, mySampler, fragUV) * fragPosition;
})";

    Inspector& inspector = Initialize(shader);
    auto result_0 = inspector.GetSamplerTextureUses("main");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    auto result_1 = inspector.GetSamplerTextureUses("main");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    EXPECT_EQ((Vector<sem::SamplerTexturePair, 4>(result_0)),
              (Vector<sem::SamplerTexturePair, 4>(result_1)));
}

TEST_F(InspectorGetSamplerTextureUsesTest, BothIndirect) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;

fn doSample(t: texture_2d<f32>, s: sampler, uv: vec2<f32>) -> vec4<f32> {
  return textureSample(t, s, uv);
}

@fragment
fn main(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return doSample(myTexture, mySampler, fragUV) * fragPosition;
})";

    Inspector& inspector = Initialize(shader);
    auto result = inspector.GetSamplerTextureUses("main");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.Length());

    EXPECT_EQ(0u, result[0].sampler_binding_point.group);
    EXPECT_EQ(1u, result[0].sampler_binding_point.binding);
    EXPECT_EQ(0u, result[0].texture_binding_point.group);
    EXPECT_EQ(2u, result[0].texture_binding_point.binding);
}

TEST_F(InspectorGetSamplerTextureUsesTest, SamplerIndirect) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;

fn doSample(s: sampler, uv: vec2<f32>) -> vec4<f32> {
  return textureSample(myTexture, s, uv);
}

@fragment
fn main(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return doSample(mySampler, fragUV) * fragPosition;
})";

    Inspector& inspector = Initialize(shader);
    auto result = inspector.GetSamplerTextureUses("main");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.Length());

    EXPECT_EQ(0u, result[0].sampler_binding_point.group);
    EXPECT_EQ(1u, result[0].sampler_binding_point.binding);
    EXPECT_EQ(0u, result[0].texture_binding_point.group);
    EXPECT_EQ(2u, result[0].texture_binding_point.binding);
}

TEST_F(InspectorGetSamplerTextureUsesTest, TextureIndirect) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;

fn doSample(t: texture_2d<f32>, uv: vec2<f32>) -> vec4<f32> {
  return textureSample(t, mySampler, uv);
}

@fragment
fn main(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return doSample(myTexture, fragUV) * fragPosition;
})";

    Inspector& inspector = Initialize(shader);
    auto result = inspector.GetSamplerTextureUses("main");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.Length());

    EXPECT_EQ(0u, result[0].sampler_binding_point.group);
    EXPECT_EQ(1u, result[0].sampler_binding_point.binding);
    EXPECT_EQ(0u, result[0].texture_binding_point.group);
    EXPECT_EQ(2u, result[0].texture_binding_point.binding);
}

TEST_F(InspectorGetSamplerTextureUsesTest, NeitherIndirect) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;

fn doSample(uv: vec2<f32>) -> vec4<f32> {
  return textureSample(myTexture, mySampler, uv);
}

@fragment
fn main(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return doSample(fragUV) * fragPosition;
})";

    Inspector& inspector = Initialize(shader);
    auto result = inspector.GetSamplerTextureUses("main");
    ASSERT_FALSE(inspector.has_error()) << inspector.error();

    ASSERT_EQ(1u, result.Length());

    EXPECT_EQ(0u, result[0].sampler_binding_point.group);
    EXPECT_EQ(1u, result[0].sampler_binding_point.binding);
    EXPECT_EQ(0u, result[0].texture_binding_point.group);
    EXPECT_EQ(2u, result[0].texture_binding_point.binding);
}

TEST_F(InspectorGetSamplerTextureUsesTest, Complex) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;


fn doSample(t: texture_2d<f32>, s: sampler, uv: vec2<f32>) -> vec4<f32> {
  return textureSample(t, s, uv);
}

fn X(t: texture_2d<f32>, s: sampler, uv: vec2<f32>) -> vec4<f32> {
  return doSample(t, s, uv);
}

fn Y(t: texture_2d<f32>, s: sampler, uv: vec2<f32>) -> vec4<f32> {
  return doSample(t, s, uv);
}

fn Z(t: texture_2d<f32>, s: sampler, uv: vec2<f32>) -> vec4<f32> {
  return X(t, s, uv) + Y(t, s, uv);
}

@fragment
fn via_call(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return Z(myTexture, mySampler, fragUV) * fragPosition;
}

@fragment
fn via_ptr(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return textureSample(myTexture, mySampler, fragUV) + fragPosition;
}

@fragment
fn direct(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return textureSample(myTexture, mySampler, fragUV) + fragPosition;
})";

    Inspector& inspector = Initialize(shader);

    {
        auto result = inspector.GetSamplerTextureUses("via_call");
        ASSERT_FALSE(inspector.has_error()) << inspector.error();

        ASSERT_EQ(1u, result.Length());

        EXPECT_EQ(0u, result[0].sampler_binding_point.group);
        EXPECT_EQ(1u, result[0].sampler_binding_point.binding);
        EXPECT_EQ(0u, result[0].texture_binding_point.group);
        EXPECT_EQ(2u, result[0].texture_binding_point.binding);
    }

    {
        auto result = inspector.GetSamplerTextureUses("via_ptr");
        ASSERT_FALSE(inspector.has_error()) << inspector.error();

        ASSERT_EQ(1u, result.Length());

        EXPECT_EQ(0u, result[0].sampler_binding_point.group);
        EXPECT_EQ(1u, result[0].sampler_binding_point.binding);
        EXPECT_EQ(0u, result[0].texture_binding_point.group);
        EXPECT_EQ(2u, result[0].texture_binding_point.binding);
    }

    {
        auto result = inspector.GetSamplerTextureUses("direct");
        ASSERT_FALSE(inspector.has_error()) << inspector.error();

        ASSERT_EQ(1u, result.Length());

        EXPECT_EQ(0u, result[0].sampler_binding_point.group);
        EXPECT_EQ(1u, result[0].sampler_binding_point.binding);
        EXPECT_EQ(0u, result[0].texture_binding_point.group);
        EXPECT_EQ(2u, result[0].texture_binding_point.binding);
    }
}

// Test calling GetUsedExtensionNames on a empty shader.
TEST_F(InspectorGetUsedExtensionNamesTest, Empty) {
    std::string shader = "";

    Inspector& inspector = Initialize(shader);

    auto result = inspector.GetUsedExtensionNames();
    EXPECT_EQ(result.size(), 0u);
}

// Test calling GetUsedExtensionNames on a shader with no extension.
TEST_F(InspectorGetUsedExtensionNamesTest, None) {
    std::string shader = R"(
@fragment
fn main() {
})";

    Inspector& inspector = Initialize(shader);

    auto result = inspector.GetUsedExtensionNames();
    EXPECT_EQ(result.size(), 0u);
}

// Test calling GetUsedExtensionNames on a shader with valid extension.
TEST_F(InspectorGetUsedExtensionNamesTest, Simple) {
    std::string shader = R"(
enable f16;

@fragment
fn main() {
})";

    Inspector& inspector = Initialize(shader);

    auto result = inspector.GetUsedExtensionNames();
    EXPECT_EQ(result.size(), 1u);
    EXPECT_EQ(result[0], "f16");
}

// Test calling GetUsedExtensionNames on a shader with a extension enabled for
// multiple times.
TEST_F(InspectorGetUsedExtensionNamesTest, Duplicated) {
    std::string shader = R"(
enable f16;
enable f16;

@fragment
fn main() {
})";

    Inspector& inspector = Initialize(shader);

    auto result = inspector.GetUsedExtensionNames();
    EXPECT_EQ(result.size(), 1u);
    EXPECT_EQ(result[0], "f16");
}

// Test calling GetEnableDirectives on a empty shader.
TEST_F(InspectorGetEnableDirectivesTest, Empty) {
    std::string shader = "";

    Inspector& inspector = Initialize(shader);

    auto result = inspector.GetEnableDirectives();
    EXPECT_EQ(result.size(), 0u);
}

// Test calling GetEnableDirectives on a shader with no extension.
TEST_F(InspectorGetEnableDirectivesTest, None) {
    std::string shader = R"(
@fragment
fn main() {
})";

    Inspector& inspector = Initialize(shader);

    auto result = inspector.GetEnableDirectives();
    EXPECT_EQ(result.size(), 0u);
}

// Test calling GetEnableDirectives on a shader with valid extension.
TEST_F(InspectorGetEnableDirectivesTest, Simple) {
    std::string shader = R"(
enable f16;

@fragment
fn main() {
})";

    Inspector& inspector = Initialize(shader);

    auto result = inspector.GetEnableDirectives();
    EXPECT_EQ(result.size(), 1u);
    EXPECT_EQ(result[0].first, "f16");
    EXPECT_EQ(result[0].second.range, (Source::Range{{2, 8}, {2, 11}}));
}

// Test calling GetEnableDirectives on a shader with a extension enabled for
// multiple times.
TEST_F(InspectorGetEnableDirectivesTest, Duplicated) {
    std::string shader = R"(
enable f16;

enable f16;
@fragment
fn main() {
})";

    Inspector& inspector = Initialize(shader);

    auto result = inspector.GetEnableDirectives();
    EXPECT_EQ(result.size(), 2u);
    EXPECT_EQ(result[0].first, "f16");
    EXPECT_EQ(result[0].second.range, (Source::Range{{2, 8}, {2, 11}}));
    EXPECT_EQ(result[1].first, "f16");
    EXPECT_EQ(result[1].second.range, (Source::Range{{4, 8}, {4, 11}}));
}

// Crash was occuring in ::GenerateSamplerTargets, when
// ::GetSamplerTextureUses was called.
TEST_F(InspectorRegressionTest, tint967) {
    std::string shader = R"(
@group(0) @binding(1) var mySampler: sampler;
@group(0) @binding(2) var myTexture: texture_2d<f32>;

fn doSample(t: texture_2d<f32>, s: sampler, uv: vec2<f32>) -> vec4<f32> {
  return textureSample(t, s, uv);
}

@fragment
fn main(@location(0) fragUV: vec2<f32>,
        @location(1) fragPosition: vec4<f32>) -> @location(0) vec4<f32> {
  return doSample(myTexture, mySampler, fragUV) * fragPosition;
})";

    Inspector& inspector = Initialize(shader);
    inspector.GetSamplerTextureUses("main");
}

}  // namespace
}  // namespace tint::inspector