// Copyright 2020 The Dawn & Tint Authors
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#include "src/tint/lang/spirv/writer/common/operand.h"

#include "gtest/gtest.h"

namespace tint::spirv::writer {
namespace {

using SpirvWriterOperandtest = testing::Test;

TEST_F(SpirvWriterOperandtest, CreateFloat) {
    auto o = Operand(1.2f);
    ASSERT_TRUE(std::holds_alternative<float>(o));
    EXPECT_FLOAT_EQ(std::get<float>(o), 1.2f);
}

TEST_F(SpirvWriterOperandtest, CreateInt) {
    auto o = Operand(1u);
    ASSERT_TRUE(std::holds_alternative<uint32_t>(o));
    EXPECT_EQ(std::get<uint32_t>(o), 1u);
}

TEST_F(SpirvWriterOperandtest, CreateString) {
    auto o = Operand("my string");
    ASSERT_TRUE(std::holds_alternative<std::string>(o));
    EXPECT_EQ(std::get<std::string>(o), "my string");
}

TEST_F(SpirvWriterOperandtest, Length_Float) {
    auto o = Operand(1.2f);
    EXPECT_EQ(OperandLength(o), 1u);
}

TEST_F(SpirvWriterOperandtest, Length_Int) {
    auto o = U32Operand(1);
    EXPECT_EQ(OperandLength(o), 1u);
}

TEST_F(SpirvWriterOperandtest, Length_String) {
    auto o = Operand("my string");
    EXPECT_EQ(OperandLength(o), 3u);
}

TEST_F(SpirvWriterOperandtest, Length_String_Empty) {
    auto o = Operand("");
    EXPECT_EQ(OperandLength(o), 1u);
}

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