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#include "gmock/gmock.h"
#include "gtest/gtest-spi.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_LoadTest = IRTestHelper;

TEST_F(IR_LoadTest, Create) {
    auto* store_type = ty.i32();
    auto* var = b.Var(ty.ptr<function, i32>());
    auto* inst = b.Load(var);

    ASSERT_TRUE(inst->Is<Load>());
    ASSERT_EQ(inst->From(), var->Result(0));
    EXPECT_EQ(inst->Result(0)->Type(), store_type);

    auto* result = inst->From()->As<InstructionResult>();
    ASSERT_NE(result, nullptr);
    ASSERT_TRUE(result->Instruction()->Is<ir::Var>());
    EXPECT_EQ(result->Instruction(), var);
}

TEST_F(IR_LoadTest, Usage) {
    auto* var = b.Var(ty.ptr<function, i32>());
    auto* inst = b.Load(var);

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

TEST_F(IR_LoadTest, Results) {
    auto* var = b.Var(ty.ptr<function, i32>());
    auto* inst = b.Load(var);

    EXPECT_EQ(inst->Results().Length(), 1u);
    EXPECT_TRUE(inst->Result(0)->Is<InstructionResult>());
    EXPECT_EQ(inst->Result(0)->Instruction(), inst);
}

TEST_F(IR_LoadTest, Clone) {
    auto* var = b.Var(ty.ptr<function, i32>());
    auto* inst = b.Load(var);

    auto* new_var = clone_ctx.Clone(var);
    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_var->Result(0), new_inst->From());
}

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