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#include "src/tint/lang/spirv/writer/common/instruction.h"

#include <string>

#include "gtest/gtest.h"

namespace tint::spirv::writer {
namespace {

using SpirvWriterInstructionTest = testing::Test;

TEST_F(SpirvWriterInstructionTest, Create) {
    Instruction i(spv::Op::OpEntryPoint, {Operand(1.2f), Operand(1u), Operand("my_str")});
    EXPECT_EQ(i.opcode(), spv::Op::OpEntryPoint);
    ASSERT_EQ(i.operands().size(), 3u);

    const auto& ops = i.operands();
    ASSERT_TRUE(std::holds_alternative<float>(ops[0]));
    EXPECT_FLOAT_EQ(std::get<float>(ops[0]), 1.2f);

    ASSERT_TRUE(std::holds_alternative<uint32_t>(ops[1]));
    EXPECT_EQ(std::get<uint32_t>(ops[1]), 1u);

    ASSERT_TRUE(std::holds_alternative<std::string>(ops[2]));
    EXPECT_EQ(std::get<std::string>(ops[2]), "my_str");
}

TEST_F(SpirvWriterInstructionTest, Length) {
    Instruction i(spv::Op::OpEntryPoint, {Operand(1.2f), Operand(1u), Operand("my_str")});
    EXPECT_EQ(i.word_length(), 5u);
}

}  // namespace
}  // namespace tint::spirv::writer