ladybird/AK/Tests/TestOptional.cpp

/*
 * Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this
 *    list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <AK/TestSuite.h>

#include <AK/Optional.h>
#include <AK/String.h>

TEST_CASE(basic_optional)
{
    Optional<int> x;
    EXPECT_EQ(x.has_value(), false);
    x = 3;
    EXPECT_EQ(x.has_value(), true);
    EXPECT_EQ(x.value(), 3);
}

TEST_CASE(move_optional)
{
    Optional<int> x;
    EXPECT_EQ(x.has_value(), false);
    x = 3;
    EXPECT_EQ(x.has_value(), true);
    EXPECT_EQ(x.value(), 3);

    Optional<int> y;
    y = move(x);
    EXPECT_EQ(y.has_value(), true);
    EXPECT_EQ(y.value(), 3);
    EXPECT_EQ(x.has_value(), false);
}

TEST_CASE(optional_leak_1)
{
    struct Structure {
        Optional<String> str;
    };

    // This used to leak, it does not anymore.
    Vector<Structure> vec;
    vec.append({ "foo" });
    EXPECT_EQ(vec[0].str.has_value(), true);
    EXPECT_EQ(vec[0].str.value(), "foo");
}

TEST_MAIN(Optional)