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AK: Add StringView::find_first/last_of

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These methods search from the beginning or end of a string for the
first character in the input StringView and returns the position in
the string of the first match. Note that this is not a substring match.
Each comes with single char overloads for efficiency.
This commit is contained in:
Andrew Kaster 2020-05-02 12:21:20 -06:00 • committed by Andreas Kling
parent 94c28552c6
commit 3eb3c2477f
3 changed files with 91 additions and 0 deletions
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43
AK/Tests/TestStringView.cpp
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@ -111,4 +111,47 @@ TEST_CASE(lines)
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)