// Copyright 2021 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 "src/tint/writer/append_vector.h"
#include "src/tint/program_builder.h"
#include "src/tint/resolver/resolver.h"
#include "src/tint/sem/type_constructor.h"

#include "gtest/gtest.h"

namespace tint {
namespace writer {
namespace {

class AppendVectorTest : public ::testing::Test, public ProgramBuilder {};

// AppendVector(vec2<i32>(1, 2), 3) -> vec3<i32>(1, 2, 3)
TEST_F(AppendVectorTest, Vec2i32_i32) {
  auto* scalar_1 = Expr(1);
  auto* scalar_2 = Expr(2);
  auto* scalar_3 = Expr(3);
  auto* vec_12 = vec2<i32>(scalar_1, scalar_2);
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 3u);
  EXPECT_EQ(vec_123->args[0], scalar_1);
  EXPECT_EQ(vec_123->args[1], scalar_2);
  EXPECT_EQ(vec_123->args[2], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 3u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(scalar_1));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(scalar_2));
  EXPECT_EQ(call->Arguments()[2], Sem().Get(scalar_3));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 3u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[2]->Type()->Is<sem::I32>());
}

// AppendVector(vec2<i32>(1, 2), 3u) -> vec3<i32>(1, 2, i32(3u))
TEST_F(AppendVectorTest, Vec2i32_u32) {
  auto* scalar_1 = Expr(1);
  auto* scalar_2 = Expr(2);
  auto* scalar_3 = Expr(3u);
  auto* vec_12 = vec2<i32>(scalar_1, scalar_2);
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 3u);
  EXPECT_EQ(vec_123->args[0], scalar_1);
  EXPECT_EQ(vec_123->args[1], scalar_2);
  auto* u32_to_i32 = vec_123->args[2]->As<ast::CallExpression>();
  ASSERT_NE(u32_to_i32, nullptr);
  EXPECT_TRUE(u32_to_i32->target.type->Is<ast::I32>());
  ASSERT_EQ(u32_to_i32->args.size(), 1u);
  EXPECT_EQ(u32_to_i32->args[0], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 3u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(scalar_1));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(scalar_2));
  EXPECT_EQ(call->Arguments()[2], Sem().Get(u32_to_i32));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 3u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[2]->Type()->Is<sem::I32>());
}

// AppendVector(vec2<i32>(vec2<u32>(1u, 2u)), 3u) ->
//    vec3<i32>(vec2<i32>(vec2<u32>(1u, 2u)), i32(3u))
TEST_F(AppendVectorTest, Vec2i32FromVec2u32_u32) {
  auto* scalar_1 = Expr(1u);
  auto* scalar_2 = Expr(2u);
  auto* scalar_3 = Expr(3u);
  auto* uvec_12 = vec2<u32>(scalar_1, scalar_2);
  auto* vec_12 = vec2<i32>(uvec_12);
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 2u);
  auto* v2u32_to_v2i32 = vec_123->args[0]->As<ast::CallExpression>();
  ASSERT_NE(v2u32_to_v2i32, nullptr);
  ASSERT_TRUE(v2u32_to_v2i32->target.type->Is<ast::Vector>());
  EXPECT_EQ(v2u32_to_v2i32->target.type->As<ast::Vector>()->width, 2u);
  EXPECT_TRUE(
      v2u32_to_v2i32->target.type->As<ast::Vector>()->type->Is<ast::I32>());
  EXPECT_EQ(v2u32_to_v2i32->args.size(), 1u);
  EXPECT_EQ(v2u32_to_v2i32->args[0], uvec_12);

  auto* u32_to_i32 = vec_123->args[1]->As<ast::CallExpression>();
  ASSERT_NE(u32_to_i32, nullptr);
  EXPECT_TRUE(u32_to_i32->target.type->Is<ast::I32>());
  ASSERT_EQ(u32_to_i32->args.size(), 1u);
  EXPECT_EQ(u32_to_i32->args[0], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 2u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(vec_12));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(u32_to_i32));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 2u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::Vector>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
}

// AppendVector(vec2<i32>(1, 2), 3.0f) -> vec3<i32>(1, 2, i32(3.0f))
TEST_F(AppendVectorTest, Vec2i32_f32) {
  auto* scalar_1 = Expr(1);
  auto* scalar_2 = Expr(2);
  auto* scalar_3 = Expr(3.0f);
  auto* vec_12 = vec2<i32>(scalar_1, scalar_2);
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 3u);
  EXPECT_EQ(vec_123->args[0], scalar_1);
  EXPECT_EQ(vec_123->args[1], scalar_2);
  auto* f32_to_i32 = vec_123->args[2]->As<ast::CallExpression>();
  ASSERT_NE(f32_to_i32, nullptr);
  EXPECT_TRUE(f32_to_i32->target.type->Is<ast::I32>());
  ASSERT_EQ(f32_to_i32->args.size(), 1u);
  EXPECT_EQ(f32_to_i32->args[0], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 3u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(scalar_1));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(scalar_2));
  EXPECT_EQ(call->Arguments()[2], Sem().Get(f32_to_i32));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 3u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[2]->Type()->Is<sem::I32>());
}

// AppendVector(vec3<i32>(1, 2, 3), 4) -> vec4<i32>(1, 2, 3, 4)
TEST_F(AppendVectorTest, Vec3i32_i32) {
  auto* scalar_1 = Expr(1);
  auto* scalar_2 = Expr(2);
  auto* scalar_3 = Expr(3);
  auto* scalar_4 = Expr(4);
  auto* vec_123 = vec3<i32>(scalar_1, scalar_2, scalar_3);
  WrapInFunction(vec_123, scalar_4);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_123, scalar_4);

  auto* vec_1234 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_1234, nullptr);
  ASSERT_EQ(vec_1234->args.size(), 4u);
  EXPECT_EQ(vec_1234->args[0], scalar_1);
  EXPECT_EQ(vec_1234->args[1], scalar_2);
  EXPECT_EQ(vec_1234->args[2], scalar_3);
  EXPECT_EQ(vec_1234->args[3], scalar_4);

  auto* call = Sem().Get(vec_1234);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 4u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(scalar_1));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(scalar_2));
  EXPECT_EQ(call->Arguments()[2], Sem().Get(scalar_3));
  EXPECT_EQ(call->Arguments()[3], Sem().Get(scalar_4));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 4u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 4u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[2]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[3]->Type()->Is<sem::I32>());
}

// AppendVector(vec_12, 3) -> vec3<i32>(vec_12, 3)
TEST_F(AppendVectorTest, Vec2i32Var_i32) {
  Global("vec_12", ty.vec2<i32>(), ast::StorageClass::kPrivate);
  auto* vec_12 = Expr("vec_12");
  auto* scalar_3 = Expr(3);
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 2u);
  EXPECT_EQ(vec_123->args[0], vec_12);
  EXPECT_EQ(vec_123->args[1], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 2u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(vec_12));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(scalar_3));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 2u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::Vector>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
}

// AppendVector(1, 2, scalar_3) -> vec3<i32>(1, 2, scalar_3)
TEST_F(AppendVectorTest, Vec2i32_i32Var) {
  Global("scalar_3", ty.i32(), ast::StorageClass::kPrivate);
  auto* scalar_1 = Expr(1);
  auto* scalar_2 = Expr(2);
  auto* scalar_3 = Expr("scalar_3");
  auto* vec_12 = vec2<i32>(scalar_1, scalar_2);
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 3u);
  EXPECT_EQ(vec_123->args[0], scalar_1);
  EXPECT_EQ(vec_123->args[1], scalar_2);
  EXPECT_EQ(vec_123->args[2], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 3u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(scalar_1));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(scalar_2));
  EXPECT_EQ(call->Arguments()[2], Sem().Get(scalar_3));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 3u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[2]->Type()->Is<sem::I32>());
}

// AppendVector(vec_12, scalar_3) -> vec3<i32>(vec_12, scalar_3)
TEST_F(AppendVectorTest, Vec2i32Var_i32Var) {
  Global("vec_12", ty.vec2<i32>(), ast::StorageClass::kPrivate);
  Global("scalar_3", ty.i32(), ast::StorageClass::kPrivate);
  auto* vec_12 = Expr("vec_12");
  auto* scalar_3 = Expr("scalar_3");
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 2u);
  EXPECT_EQ(vec_123->args[0], vec_12);
  EXPECT_EQ(vec_123->args[1], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 2u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(vec_12));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(scalar_3));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 2u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::Vector>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
}

// AppendVector(vec_12, scalar_3) -> vec3<i32>(vec_12, i32(scalar_3))
TEST_F(AppendVectorTest, Vec2i32Var_f32Var) {
  Global("vec_12", ty.vec2<i32>(), ast::StorageClass::kPrivate);
  Global("scalar_3", ty.f32(), ast::StorageClass::kPrivate);
  auto* vec_12 = Expr("vec_12");
  auto* scalar_3 = Expr("scalar_3");
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 2u);
  EXPECT_EQ(vec_123->args[0], vec_12);
  auto* f32_to_i32 = vec_123->args[1]->As<ast::CallExpression>();
  ASSERT_NE(f32_to_i32, nullptr);
  EXPECT_TRUE(f32_to_i32->target.type->Is<ast::I32>());
  ASSERT_EQ(f32_to_i32->args.size(), 1u);
  EXPECT_EQ(f32_to_i32->args[0], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 2u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(vec_12));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(f32_to_i32));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 2u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::Vector>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
}

// AppendVector(vec_12, scalar_3) -> vec3<bool>(vec_12, scalar_3)
TEST_F(AppendVectorTest, Vec2boolVar_boolVar) {
  Global("vec_12", ty.vec2<bool>(), ast::StorageClass::kPrivate);
  Global("scalar_3", ty.bool_(), ast::StorageClass::kPrivate);
  auto* vec_12 = Expr("vec_12");
  auto* scalar_3 = Expr("scalar_3");
  WrapInFunction(vec_12, scalar_3);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec_12, scalar_3);

  auto* vec_123 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_123, nullptr);
  ASSERT_EQ(vec_123->args.size(), 2u);
  EXPECT_EQ(vec_123->args[0], vec_12);
  EXPECT_EQ(vec_123->args[1], scalar_3);

  auto* call = Sem().Get(vec_123);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 2u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(vec_12));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(scalar_3));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 3u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::Bool>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 2u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::Vector>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::Bool>());
}

// AppendVector(vec3<i32>(), 4) -> vec3<bool>(0, 0, 0, 4)
TEST_F(AppendVectorTest, ZeroVec3i32_i32) {
  auto* scalar = Expr(4);
  auto* vec000 = vec3<i32>();
  WrapInFunction(vec000, scalar);

  resolver::Resolver resolver(this);
  ASSERT_TRUE(resolver.Resolve()) << resolver.error();

  auto* append = AppendVector(this, vec000, scalar);

  auto* vec_0004 = As<ast::CallExpression>(append->Declaration());
  ASSERT_NE(vec_0004, nullptr);
  ASSERT_EQ(vec_0004->args.size(), 4u);
  for (size_t i = 0; i < 3; i++) {
    auto* literal = As<ast::SintLiteralExpression>(vec_0004->args[i]);
    ASSERT_NE(literal, nullptr);
    EXPECT_EQ(literal->value, 0);
  }
  EXPECT_EQ(vec_0004->args[3], scalar);

  auto* call = Sem().Get(vec_0004);
  ASSERT_NE(call, nullptr);
  ASSERT_EQ(call->Arguments().size(), 4u);
  EXPECT_EQ(call->Arguments()[0], Sem().Get(vec_0004->args[0]));
  EXPECT_EQ(call->Arguments()[1], Sem().Get(vec_0004->args[1]));
  EXPECT_EQ(call->Arguments()[2], Sem().Get(vec_0004->args[2]));
  EXPECT_EQ(call->Arguments()[3], Sem().Get(scalar));

  auto* ctor = call->Target()->As<sem::TypeConstructor>();
  ASSERT_NE(ctor, nullptr);
  ASSERT_TRUE(ctor->ReturnType()->Is<sem::Vector>());
  EXPECT_EQ(ctor->ReturnType()->As<sem::Vector>()->Width(), 4u);
  EXPECT_TRUE(ctor->ReturnType()->As<sem::Vector>()->type()->Is<sem::I32>());
  EXPECT_EQ(ctor->ReturnType(), call->Type());

  ASSERT_EQ(ctor->Parameters().size(), 4u);
  EXPECT_TRUE(ctor->Parameters()[0]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[1]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[2]->Type()->Is<sem::I32>());
  EXPECT_TRUE(ctor->Parameters()[3]->Type()->Is<sem::I32>());
}

}  // namespace
}  // namespace writer
}  // namespace tint