/*
 * libfud
 * Copyright 2024 Dominick Allen
 *
 * 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 "fud_option.hpp"

#include "gtest/gtest.h"

namespace fud {

TEST(OptionTest, OptionCreation)
{
    static_assert(sizeof(std::reference_wrapper<int>) == 8);
    int value = 42;
    Option<int> maybeValue{};
    ASSERT_FALSE(maybeValue.hasValue());
    maybeValue = value;
    ASSERT_TRUE(maybeValue.hasValue());
}

TEST(OptionTest, OptionRef)
{
    int value = 42;
    Option<int&> optionalValueRef{value};
    ASSERT_TRUE(optionalValueRef.hasValue());
    ASSERT_EQ(optionalValueRef.value(), 42);
    optionalValueRef.value() = 7;
    ASSERT_EQ(value, 7);

    value = 42;
    int otherValue = 13;
    optionalValueRef = otherValue;
    ASSERT_TRUE(optionalValueRef.hasValue());
    ASSERT_EQ(optionalValueRef.value(), otherValue);
    optionalValueRef.value() = 7;
    ASSERT_EQ(optionalValueRef.value(), otherValue);
    ASSERT_EQ(otherValue, 7);
    ASSERT_EQ(value, 42);
}

} // namespace fud