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#include "gmock/gmock.h"
#include "src/tint/lang/core/ir/builder.h"
#include "src/tint/lang/core/ir/instruction.h"
#include "src/tint/lang/core/ir/ir_helper_test.h"

namespace tint::core::ir {
namespace {

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

using IR_LoadVectorElementTest = IRTestHelper;

TEST_F(IR_LoadVectorElementTest, Create) {
    auto* from = b.Var(ty.ptr<private_, vec3<i32>>());
    auto* inst = b.LoadVectorElement(from, 2_i);

    ASSERT_TRUE(inst->Is<LoadVectorElement>());
    ASSERT_EQ(inst->From(), from->Result(0));

    ASSERT_TRUE(inst->Index()->Is<Constant>());
    auto index = inst->Index()->As<Constant>()->Value();
    ASSERT_TRUE(index->Is<core::constant::Scalar<i32>>());
    EXPECT_EQ(2_i, index->As<core::constant::Scalar<i32>>()->ValueAs<i32>());
}

TEST_F(IR_LoadVectorElementTest, Usage) {
    auto* from = b.Var(ty.ptr<private_, vec3<i32>>());
    auto* inst = b.LoadVectorElement(from, 2_i);

    ASSERT_NE(inst->From(), nullptr);
    EXPECT_THAT(inst->From()->Usages(), testing::UnorderedElementsAre(Usage{inst, 0u}));

    ASSERT_NE(inst->Index(), nullptr);
    EXPECT_THAT(inst->Index()->Usages(), testing::UnorderedElementsAre(Usage{inst, 1u}));
}

TEST_F(IR_LoadVectorElementTest, Result) {
    auto* from = b.Var(ty.ptr<private_, vec3<i32>>());
    auto* inst = b.LoadVectorElement(from, 2_i);

    EXPECT_EQ(inst->Results().Length(), 1u);
}

TEST_F(IR_LoadVectorElementTest, Clone) {
    auto* from = b.Var(ty.ptr<private_, vec3<i32>>());
    auto* inst = b.LoadVectorElement(from, 2_i);

    auto* new_from = clone_ctx.Clone(from);
    auto* new_inst = clone_ctx.Clone(inst);

    EXPECT_NE(inst, new_inst);
    EXPECT_NE(nullptr, new_inst->Result(0));
    EXPECT_NE(inst->Result(0), new_inst->Result(0));

    EXPECT_EQ(new_from->Result(0), new_inst->From());

    auto new_idx = new_inst->Index()->As<Constant>()->Value();
    ASSERT_TRUE(new_idx->Is<core::constant::Scalar<i32>>());
    EXPECT_EQ(2_i, new_idx->As<core::constant::Scalar<i32>>()->ValueAs<i32>());
}

}  // namespace
}  // namespace tint::core::ir