namespace TextTests; #nullable enable public class StringTests { [Fact] public void TestGetColumns_Null () { string? str = null; Assert.Equal (0, str!.GetColumns ()); } [Fact] public void TestGetColumns_Empty () { var str = string.Empty; Assert.Equal (0, str.GetColumns ()); } [Fact] public void TestGetColumns_SingleRune () { var str = "a"; Assert.Equal (1, str.GetColumns ()); } [Fact] public void TestGetColumns_Zero_Width () { var str = "\u200D"; Assert.Equal (0, str.GetColumns ()); } [Theory] [InlineData ("a", 1)] [InlineData ("á", 1)] [InlineData ("ab", 2)] [InlineData ("áé", 2)] [InlineData ("abc", 3)] [InlineData ("áéí", 3)] [InlineData ("abcd", 4)] public void TestGetColumns_MultiRune (string str, int expected) { Assert.Equal (expected, str.GetColumns ()); } // Test non-BMP codepoints // Face with Tears of Joy Emoji (😂), Unicode U+1F602 is 2 columns wide [Theory] [InlineData ("😂", 2)] [InlineData ("😂😂", 4)] public void TestGetColumns_MultiRune_NonBMP (string str, int expected) { Assert.Equal (expected, str.GetColumns ()); } // Test known wide codepoints [Theory] [InlineData ("🙂", 2, 1, 2)] [InlineData ("a🙂", 3, 2, 3)] [InlineData ("🙂a", 3, 2, 3)] [InlineData ("👨‍👩‍👦‍👦", 8, 1, 2)] [InlineData ("👨‍👩‍👦‍👦🙂", 10, 2, 4)] [InlineData ("👨‍👩‍👦‍👦🙂a", 11, 3, 5)] [InlineData ("👨‍👩‍👦‍👦a🙂", 11, 3, 5)] [InlineData ("👨‍👩‍👦‍👦👨‍👩‍👦‍👦", 16, 2, 4)] [InlineData ("าำ", 2, 1, 2)] // า U+0E32 - THAI CHARACTER SARA AA with ำ U+0E33 - THAI CHARACTER SARA AM [InlineData ("山", 2, 1, 2)] // The character for "mountain" in Chinese/Japanese/Korean (山), Unicode U+5C71 [InlineData ("山🙂", 4, 2, 4)] // The character for "mountain" in Chinese/Japanese/Korean (山), Unicode U+5C71 [InlineData ("a\ufe20e\ufe21", 2, 2, 2)] // Combining Ligature Left Half ︠ - U+fe20 -https://github.com/microsoft/terminal/blob/main/src/types/unicode_width_overrides.xml // Combining Ligature Right Half - U+fe21 -https://github.com/microsoft/terminal/blob/main/src/types/unicode_width_overrides.xml //[InlineData ("क", 1, 1, 1)] // क U+0915 Devanagari Letter Ka //[InlineData ("ि", 1, 1, 1)] // U+093F Devanagari Vowel Sign I ि (i-kar). //[InlineData ("कि", 2, 1, 2)] // "कि" is U+0915 for the base consonant "क" with U+093F for the vowel sign "ि" (i-kar). [InlineData ("ᄀ", 2, 1, 2)] // ᄀ U+1100 HANGUL CHOSEONG KIYEOK (consonant) [InlineData ("ᅡ", 0, 1, 0)] // ᅡ U+1161 HANGUL JUNGSEONG A (vowel) [InlineData ("가", 2, 1, 2)] // ᄀ U+1100 HANGUL CHOSEONG KIYEOK (consonant) with ᅡ U+1161 HANGUL JUNGSEONG A (vowel) [InlineData ("ᄒ", 2, 1, 2)] // ᄒ U+1112 Hangul Choseong Hieuh [InlineData ("ᅵ", 0, 1, 0)] // ᅵ U+1175 Hangul Jungseong I [InlineData ("ᇂ", 0, 1, 0)] // ᇂ U+11C2 Hangul Jongseong Hieuh [InlineData ("힣", 2, 1, 2)] // ᄒ (choseong h) + ᅵ (jungseong i) + ᇂ (jongseong h) [InlineData ("ힰ", 0, 1, 0)] // U+D7B0 ힰ Hangul Jungseong O-Yeo [InlineData ("ᄀힰ", 2, 1, 2)] // ᄀ U+1100 HANGUL CHOSEONG KIYEOK (consonant) with U+D7B0 ힰ Hangul Jungseong O-Yeo //[InlineData ("षि", 2, 1, 2)] // U+0937 ष DEVANAGARI LETTER SSA with U+093F ि COMBINING DEVANAGARI VOWEL SIGN I [InlineData ("🇵🇹", 2, 1, 2)] // 🇵 U+1F1F5 — REGIONAL INDICATOR SYMBOL LETTER P with 🇹 U+1F1F9 — REGIONAL INDICATOR SYMBOL LETTER T (flag of Portugal) public void TestGetColumns_MultiRune_WideBMP_Graphemes (string str, int expectedRunesWidth, int expectedGraphemesCount, int expectedWidth) { Assert.Equal (expectedRunesWidth, str.EnumerateRunes ().Sum (r => r.GetColumns ())); Assert.Equal (expectedGraphemesCount, GraphemeHelper.GetGraphemes (str).ToArray ().Length); Assert.Equal (expectedWidth, str.GetColumns ()); } [Theory] [InlineData (null)] [InlineData ("")] public void TestGetColumns_Does_Not_Throws_With_Null_And_Empty_String (string? text) { // ReSharper disable once InvokeAsExtensionMethod Assert.Equal (0, StringExtensions.GetColumns (text!)); } public class ReadOnlySpanExtensionsTests { [Theory] [InlineData ("12345", true)] // all ASCII digits [InlineData ("0", true)] // single ASCII digit [InlineData ("", false)] // empty span [InlineData ("12a45", false)] // contains a letter [InlineData ("１２３", false)] // full-width Unicode digits (not ASCII) [InlineData ("12 34", false)] // contains space [InlineData ("١٢٣", false)] // Arabic-Indic digits public void IsAllAsciiDigits_WorksAsExpected (string input, bool expected) { // Arrange ReadOnlySpan span = input.AsSpan (); // Act bool result = span.IsAllAsciiDigits (); // Assert Assert.Equal (expected, result); } } [Theory] [InlineData ("0", true)] [InlineData ("9", true)] [InlineData ("A", true)] [InlineData ("F", true)] [InlineData ("a", true)] [InlineData ("f", true)] [InlineData ("123ABC", true)] [InlineData ("abcdef", true)] [InlineData ("G", false)] // 'G' not hex [InlineData ("Z9", false)] // 'Z' not hex [InlineData ("12 34", false)] // space not hex [InlineData ("", false)] // empty string [InlineData ("１２３", false)] // full-width digits, not ASCII [InlineData ("0xFF", false)] // includes 'x' public void IsAllAsciiHexDigits_ReturnsExpected (string input, bool expected) { // Arrange ReadOnlySpan span = input.AsSpan (); // Act bool result = span.IsAllAsciiHexDigits (); // Assert Assert.Equal (expected, result); } [Theory] [MemberData (nameof (GetStringConcatCases))] public void ToString_ReturnsExpected (IEnumerable input, string expected) { // Act string result = StringExtensions.ToString (input); // Assert Assert.Equal (expected, result); } public static IEnumerable GetStringConcatCases () { yield return [new string [] { }, string.Empty]; // Empty sequence yield return [new [] { "" }, string.Empty]; // Single empty string yield return [new [] { "A" }, "A"]; // Single element yield return [new [] { "A", "B" }, "AB"]; // Simple concatenation yield return [new [] { "Hello", " ", "World" }, "Hello World"]; // Multiple parts yield return [new [] { "123", "456", "789" }, "123456789"]; // Numeric strings yield return [new [] { "👩‍", "🧒" }, "👩‍🧒"]; // Grapheme sequence yield return [new [] { "α", "β", "γ" }, "αβγ"]; // Unicode letters yield return [new [] { "A", null, "B" }, "AB"]; // Null ignored by string.Concat yield return [new [] { "🇵", "🇹" }, "🇵🇹"]; // Grapheme sequence } [Theory] [InlineData ("", false)] // Empty string [InlineData ("A", false)] // Single BMP character [InlineData ("AB", false)] // Two BMP chars, not a surrogate pair [InlineData ("👩", true)] // Single emoji surrogate pair (U+1F469) [InlineData ("🧒", true)] // Another emoji surrogate pair (U+1F9D2) [InlineData ("𐍈", true)] // Gothic letter hwair (U+10348) [InlineData ("A👩", false)] // One BMP + one surrogate half [InlineData ("👩‍", false)] // Surrogate pair + ZWJ (length != 2) public void IsSurrogatePair_ReturnsExpected (string input, bool expected) { // Act bool result = input.IsSurrogatePair (); // Assert Assert.Equal (expected, result); } [Theory] // Control characters (should be replaced with the "Control Pictures" block) [InlineData ("\u0000", "\u2400")] // NULL → ␀ [InlineData ("\u0009", "\u2409")] // TAB → ␉ [InlineData ("\u000A", "\u240A")] // LF → ␊ [InlineData ("\u000D", "\u240D")] // CR → ␍ // Printable characters (should remain unchanged) [InlineData ("A", "A")] [InlineData (" ", " ")] [InlineData ("~", "~")] // Multi-character string (should return unchanged) [InlineData ("AB", "AB")] [InlineData ("Hello", "Hello")] [InlineData ("\u0009A", "\u0009A")] // includes a control char, but length > 1 public void MakePrintable_ReturnsExpected (string input, string expected) { // Act string result = input.MakePrintable (); // Assert Assert.Equal (expected, result); } }