ladybird/AK/Tests/TestStringView.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/String.h>

TEST_CASE(construct_empty)
{
    EXPECT(StringView().is_null());
    EXPECT(StringView().is_empty());
    EXPECT(!StringView().characters_without_null_termination());
    EXPECT_EQ(StringView().length(), 0u);
}

TEST_CASE(view_literal)
{
    const char* truth = "cats rule dogs drool";
    StringView view(truth);
    EXPECT_EQ(view.is_null(), false);
    EXPECT_EQ(view.characters_without_null_termination(), truth);
    EXPECT_EQ(view, view);
    EXPECT_EQ(view, truth);
}

TEST_CASE(compare_views)
{
    String foo1 = "foo";
    String foo2 = "foo";
    auto view1 = foo1.view();
    auto view2 = foo2.view();

    EXPECT_EQ(view1, view2);
    EXPECT_EQ(view1, foo1);
    EXPECT_EQ(view1, foo2);
    EXPECT_EQ(view1, "foo");
}

TEST_CASE(starts_with)
{
    String test_string = "ABCDEF";
    StringView test_string_view = test_string.view();
    EXPECT(test_string_view.starts_with('A'));
    EXPECT(!test_string_view.starts_with('B'));
    EXPECT(test_string_view.starts_with("AB"));
    EXPECT(test_string_view.starts_with("ABCDEF"));
    EXPECT(!test_string_view.starts_with("DEF"));
}

TEST_CASE(ends_with)
{
    String test_string = "ABCDEF";
    StringView test_string_view = test_string.view();
    EXPECT(test_string_view.ends_with("DEF"));
    EXPECT(test_string_view.ends_with('F'));
    EXPECT(!test_string_view.ends_with('E'));
    EXPECT(test_string_view.ends_with("ABCDEF"));
    EXPECT(!test_string_view.ends_with("ABCDE"));
    EXPECT(!test_string_view.ends_with("ABCDEFG"));
}

TEST_CASE(lines)
{
    String test_string = "a\nb\r\nc\rd";
    StringView test_string_view = test_string.view();
    Vector<StringView> test_string_vector = test_string_view.lines();
    EXPECT_EQ(test_string_vector.size(), 4u);
    EXPECT(test_string_vector.at(0) == String("a"));
    EXPECT(test_string_vector.at(1) == String("b"));
    EXPECT(test_string_vector.at(2) == String("c"));
    EXPECT(test_string_vector.at(3) == String("d"));

    test_string = "```\nHello there\r\nHello there\n```";
    test_string_view = test_string.view();
    test_string_vector = test_string_view.lines();
    EXPECT_EQ(test_string_vector.size(), 4u);
    EXPECT(test_string_vector.at(0) == String("```"));
    EXPECT(test_string_vector.at(1) == String("Hello there"));
    EXPECT(test_string_vector.at(2) == String("Hello there"));
    EXPECT(test_string_vector.at(3) == String("```"));

    test_string = "\n\n\n";
    test_string_view = test_string.view();
    test_string_vector = test_string_view.lines();
    EXPECT_EQ(test_string_vector.size(), 3u);
    EXPECT_EQ(test_string_vector.at(0).is_empty(), true);
    EXPECT_EQ(test_string_vector.at(1).is_empty(), true);
    EXPECT_EQ(test_string_vector.at(2).is_empty(), true);
}

TEST_CASE(find_first_of)
{
    String test_string = "aabbcc_xy_ccbbaa";
    StringView test_string_view = test_string.view();

    EXPECT_EQ(test_string_view.find_first_of('b').has_value(), true);
    EXPECT_EQ(test_string_view.find_first_of('b').value(), 2U);

    EXPECT_EQ(test_string_view.find_first_of('_').has_value(), true);
    EXPECT_EQ(test_string_view.find_first_of('_').value(), 6U);

    EXPECT_EQ(test_string_view.find_first_of("bc").has_value(), true);
    EXPECT_EQ(test_string_view.find_first_of("bc").value(), 2U);

    EXPECT_EQ(test_string_view.find_first_of("yx").has_value(), true);
    EXPECT_EQ(test_string_view.find_first_of("yx").value(), 7U);

    EXPECT_EQ(test_string_view.find_first_of('n').has_value(), false);
    EXPECT_EQ(test_string_view.find_first_of("defg").has_value(), false);
}

TEST_CASE(find_last_of)
{
    String test_string = "aabbcc_xy_ccbbaa";
    StringView test_string_view = test_string.view();

    EXPECT_EQ(test_string_view.find_last_of('b').has_value(), true);
    EXPECT_EQ(test_string_view.find_last_of('b').value(), 13U);

    EXPECT_EQ(test_string_view.find_last_of('_').has_value(), true);
    EXPECT_EQ(test_string_view.find_last_of('_').value(), 9U);

    EXPECT_EQ(test_string_view.find_last_of("bc").has_value(), true);
    EXPECT_EQ(test_string_view.find_last_of("bc").value(), 13U);

    EXPECT_EQ(test_string_view.find_last_of("yx").has_value(), true);
    EXPECT_EQ(test_string_view.find_last_of("yx").value(), 8U);

    EXPECT_EQ(test_string_view.find_last_of('3').has_value(), false);
    EXPECT_EQ(test_string_view.find_last_of("fghi").has_value(), false);
}


TEST_MAIN(StringView)