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Regex.Match.Tests.cs
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
using System.Collections.Generic;
using System.Diagnostics;
using System.Globalization;
using System.Linq;
using System.Threading;
using System.Threading.Tasks;
using System.Tests;
using Microsoft.DotNet.RemoteExecutor;
using Xunit;
namespace System.Text.RegularExpressions.Tests
{
public class RegexMatchTests
{
public static IEnumerable<object[]> Match_MemberData()
{
foreach (RegexEngine engine in RegexHelpers.AvailableEngines)
{
(string Pattern, string Input, RegexOptions Options, int Beginning, int Length, bool ExpectedSuccess, string ExpectedValue)[] cases = Cases(engine).ToArray();
Regex[] regexes = RegexHelpers.GetRegexesAsync(engine, cases.Select(c => (c.Pattern, (RegexOptions?)c.Options, (TimeSpan?)null)).ToArray()).Result;
for (int i = 0; i < regexes.Length; i++)
{
yield return new object[] { engine, cases[i].Pattern, cases[i].Input, cases[i].Options, regexes[i], cases[i].Beginning, cases[i].Length, cases[i].ExpectedSuccess, cases[i].ExpectedValue };
}
}
static IEnumerable<(string Pattern, string Input, RegexOptions Options, int Beginning, int Length, bool ExpectedSuccess, string ExpectedValue)> Cases(RegexEngine engine)
{
// pattern, input, options, beginning, length, expectedSuccess, expectedValue
yield return (@"H#", "#H#", RegexOptions.IgnoreCase, 0, 3, true, "H#"); // https://github.com/dotnet/runtime/issues/39390
yield return (@"H#", "#H#", RegexOptions.None, 0, 3, true, "H#");
// Testing octal sequence matches: "\\060(\\061)?\\061"
// Octal \061 is ASCII 49 ('1')
yield return (@"\060(\061)?\061", "011", RegexOptions.None, 0, 3, true, "011");
// Testing hexadecimal sequence matches: "(\\x30\\x31\\x32)"
// Hex \x31 is ASCII 49 ('1')
yield return (@"(\x30\x31\x32)", "012", RegexOptions.None, 0, 3, true, "012");
// Testing control character escapes???: "2", "(\u0032)"
yield return ("(\u0034)", "4", RegexOptions.None, 0, 1, true, "4");
// Using long loop prefix
yield return (@"a{10}", new string('a', 10), RegexOptions.None, 0, 10, true, new string('a', 10));
yield return (@"a{100}", new string('a', 100), RegexOptions.None, 0, 100, true, new string('a', 100));
yield return (@"a{10}b", new string('a', 10) + "bc", RegexOptions.None, 0, 12, true, new string('a', 10) + "b");
yield return (@"a{100}b", new string('a', 100) + "bc", RegexOptions.None, 0, 102, true, new string('a', 100) + "b");
yield return (@"a{11}b", new string('a', 10) + "bc", RegexOptions.None, 0, 12, false, string.Empty);
yield return (@"a{101}b", new string('a', 100) + "bc", RegexOptions.None, 0, 102, false, string.Empty);
yield return (@"a{1,3}b", "bc", RegexOptions.None, 0, 2, false, string.Empty);
yield return (@"a{1,3}b", "abc", RegexOptions.None, 0, 3, true, "ab");
yield return (@"a{1,3}b", "aaabc", RegexOptions.None, 0, 5, true, "aaab");
yield return (@"a{1,3}b", "aaaabc", RegexOptions.None, 0, 6, true, "aaab");
yield return (@"a{2,}b", "abc", RegexOptions.None, 0, 3, false, string.Empty);
yield return (@"a{2,}b", "aabc", RegexOptions.None, 0, 4, true, "aab");
// {,n} is treated as a literal rather than {0,n} as it should be
yield return (@"a{,3}b", "a{,3}bc", RegexOptions.None, 0, 6, true, "a{,3}b");
yield return (@"a{,3}b", "aaabc", RegexOptions.None, 0, 5, false, string.Empty);
// Using [a-z], \s, \w: Actual - "([a-zA-Z]+)\\s(\\w+)"
yield return (@"([a-zA-Z]+)\s(\w+)", "David Bau", RegexOptions.None, 0, 9, true, "David Bau");
// \\S, \\d, \\D, \\W: Actual - "(\\S+):\\W(\\d+)\\s(\\D+)"
yield return (@"(\S+):\W(\d+)\s(\D+)", "Price: 5 dollars", RegexOptions.None, 0, 16, true, "Price: 5 dollars");
// \\S, \\d, \\D, \\W: Actual - "[^0-9]+(\\d+)"
yield return (@"[^0-9]+(\d+)", "Price: 30 dollars", RegexOptions.None, 0, 17, true, "Price: 30");
if (!RegexHelpers.IsNonBacktracking(engine))
{
// Zero-width negative lookahead assertion: Actual - "abc(?!XXX)\\w+"
yield return (@"abc(?!XXX)\w+", "abcXXXdef", RegexOptions.None, 0, 9, false, string.Empty);
// Zero-width positive lookbehind assertion: Actual - "(\\w){6}(?<=XXX)def"
yield return (@"(\w){6}(?<=XXX)def", "abcXXXdef", RegexOptions.None, 0, 9, true, "abcXXXdef");
// Zero-width negative lookbehind assertion: Actual - "(\\w){6}(?<!XXX)def"
yield return (@"(\w){6}(?<!XXX)def", "XXXabcdef", RegexOptions.None, 0, 9, true, "XXXabcdef");
// Nonbacktracking subexpression: Actual - "[^0-9]+(?>[0-9]+)3"
// The last 3 causes the match to fail, since the non backtracking subexpression does not give up the last digit it matched
// for it to be a success. For a correct match, remove the last character, '3' from the pattern
yield return ("[^0-9]+(?>[0-9]+)3", "abc123", RegexOptions.None, 0, 6, false, string.Empty);
yield return ("[^0-9]+(?>[0-9]+)", "abc123", RegexOptions.None, 0, 6, true, "abc123");
yield return (@"(?!.*a)\w*g", "bcaefg", RegexOptions.None, 0, 6, true, "efg");
yield return (@"(?!.*a)\w*g", "aaaaag", RegexOptions.None, 0, 6, true, "g");
yield return (@"(?!.*a)\w*g", "aaaaaa", RegexOptions.None, 0, 6, false, string.Empty);
}
// More nonbacktracking expressions
foreach (RegexOptions options in new[] { RegexOptions.None, RegexOptions.IgnoreCase })
{
string Case(string s) => (options & RegexOptions.IgnoreCase) != 0 ? s.ToUpper() : s;
yield return (Case("(?:hi|hello|hey)hi"), "hellohi", options, 0, 7, true, "hellohi"); // allow backtracking and it succeeds
yield return (Case(@"a[^wyz]*w"), "abczw", RegexOptions.IgnoreCase, 0, 0, false, string.Empty);
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (Case("(?>[0-9]+)abc"), "abc12345abc", options, 3, 8, true, "12345abc");
yield return (Case("(?>(?>[0-9]+))abc"), "abc12345abc", options, 3, 8, true, "12345abc");
yield return (Case("(?>[0-9]*)abc"), "abc12345abc", options, 3, 8, true, "12345abc");
yield return (Case("(?>[^z]+)z"), "zzzzxyxyxyz123", options, 4, 9, true, "xyxyxyz");
yield return (Case("(?>(?>[^z]+))z"), "zzzzxyxyxyz123", options, 4, 9, true, "xyxyxyz");
yield return (Case("(?>[^z]*)z123"), "zzzzxyxyxyz123", options, 4, 10, true, "xyxyxyz123");
yield return (Case("(?>a+)123"), "aa1234", options, 0, 5, true, "aa123");
yield return (Case("(?>a*)123"), "aa1234", options, 0, 5, true, "aa123");
yield return (Case("(?>(?>a*))123"), "aa1234", options, 0, 5, true, "aa123");
yield return (Case("(?>a+?)a"), "aaaaa", options, 0, 2, true, "aa");
yield return (Case("(?>a*?)a"), "aaaaa", options, 0, 1, true, "a");
yield return (Case("(?>hi|hello|hey)hi"), "hellohi", options, 0, 0, false, string.Empty);
yield return (Case("(?>hi|hello|hey)hi"), "hihi", options, 0, 4, true, "hihi");
}
}
// Loops at beginning of expressions
yield return (@"a+", "aaa", RegexOptions.None, 0, 3, true, "aaa");
yield return (@"a+\d+", "a1", RegexOptions.None, 0, 2, true, "a1");
yield return (@".+\d+", "a1", RegexOptions.None, 0, 2, true, "a1");
yield return (".+\nabc", "a\nabc", RegexOptions.None, 0, 5, true, "a\nabc");
yield return (@"\d+", "abcd123efg", RegexOptions.None, 0, 10, true, "123");
yield return (@"\d+\d+", "abcd123efg", RegexOptions.None, 0, 10, true, "123");
yield return (@"\w+123\w+", "abcd123efg", RegexOptions.None, 0, 10, true, "abcd123efg");
yield return (@"\d+\w+", "abcd123efg", RegexOptions.None, 0, 10, true, "123efg");
yield return (@"\w+@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"\w{3,}@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"\w{4,}@\w+.com", "[email protected]", RegexOptions.None, 0, 11, false, string.Empty);
yield return (@"\w{2,5}@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"\w{3}@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"\w{0,3}@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"\w{0,2}c@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"\w*@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"(\w+)@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"((\w+))@\w+.com", "[email protected]", RegexOptions.None, 0, 11, true, "[email protected]");
yield return (@"(\w+)c@\w+.com", "[email protected]", RegexOptions.None, 0, 17, true, "[email protected]");
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (@"(\w+)c@\w+.com\1", "[email protected]", RegexOptions.None, 0, 17, true, "[email protected]");
yield return (@"(\w+)@def.com\1", "[email protected]", RegexOptions.None, 0, 13, false, string.Empty);
yield return (@"(\w+)@def.com\1", "[email protected]", RegexOptions.None, 0, 13, true, "[email protected]");
yield return (@"(\w*)@def.com\1", "[email protected]", RegexOptions.None, 0, 11, true, "@def.com");
yield return (@"\w+(?<!a)", "a", RegexOptions.None, 0, 1, false, string.Empty);
yield return (@"\w+(?<!a)", "aa", RegexOptions.None, 0, 2, false, string.Empty);
yield return (@"(?>\w+)(?<!a)", "a", RegexOptions.None, 0, 1, false, string.Empty);
yield return (@"(?>\w+)(?<!a)", "aa", RegexOptions.None, 0, 2, false, string.Empty);
}
yield return (@".+a", "baa", RegexOptions.None, 0, 3, true, "baa");
yield return (@"[ab]+a", "cacbaac", RegexOptions.None, 0, 7, true, "baa");
yield return (@"^(\d{2,3}){2}$", "1234", RegexOptions.None, 0, 4, true, "1234");
yield return (@"(\d{2,3}){2}", "1234", RegexOptions.None, 0, 4, true, "1234");
yield return (@"((\d{2,3})){2}", "1234", RegexOptions.None, 0, 4, true, "1234");
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (@"(\d{2,3})+", "1234", RegexOptions.None, 0, 4, true, "123");
yield return (@"(\d{2,3})*", "123456", RegexOptions.None, 0, 4, true, "123");
}
else
{
// In NonBacktracking engine the alternation in the inner loop allows the alternate longer eager match of \d{2}\d{2}
yield return (@"(\d{2,3})+", "1234", RegexOptions.None, 0, 4, true, "1234");
yield return (@"(\d{2,3})*", "123456", RegexOptions.None, 0, 4, true, "1234");
}
yield return (@"(abc\d{2,3}){2}", "abc123abc4567", RegexOptions.None, 0, 12, true, "abc123abc456");
foreach (RegexOptions lineOption in new[] { RegexOptions.None, RegexOptions.Singleline, RegexOptions.Multiline })
{
yield return (@".*", "abc", lineOption, 1, 2, true, "bc");
yield return (@".*c", "abc", lineOption, 1, 2, true, "bc");
yield return (@"b.*", "abc", lineOption, 1, 2, true, "bc");
yield return (@".*", "abc", lineOption, 2, 1, true, "c");
}
// Nested loops
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return ("a*(?:a[ab]*)*", "aaaababbbbbbabababababaaabbb", RegexOptions.None, 0, 28, true, "aaaa");
}
// Using beginning/end of string chars \A, \Z: Actual - "\\Aaaa\\w+zzz\\Z"
yield return (@"\Aaaa\w+zzz\Z", "aaaasdfajsdlfjzzz", RegexOptions.IgnoreCase, 0, 17, true, "aaaasdfajsdlfjzzz");
yield return (@"\Aaaaaa\w+zzz\Z", "aaaa", RegexOptions.IgnoreCase, 0, 4, false, string.Empty);
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (@"\Aaaaaa\w+zzz\Z", "aaaa", RegexOptions.RightToLeft, 0, 4, false, string.Empty);
yield return (@"\Aaaaaa\w+zzzzz\Z", "aaaa", RegexOptions.RightToLeft, 0, 4, false, string.Empty);
yield return (@"\Aaaaaa\w+zzz\Z", "aaaa", RegexOptions.RightToLeft | RegexOptions.IgnoreCase, 0, 4, false, string.Empty);
}
yield return (@"abc\Adef", "abcdef", RegexOptions.None, 0, 0, false, string.Empty);
yield return (@"abc\adef", "abcdef", RegexOptions.None, 0, 0, false, string.Empty);
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (@"abc\Gdef", "abcdef", RegexOptions.None, 0, 0, false, string.Empty);
}
yield return (@"abc^def", "abcdef", RegexOptions.None, 0, 0, false, string.Empty);
yield return (@"abc\Zef", "abcdef", RegexOptions.None, 0, 0, false, string.Empty);
yield return (@"abc\zef", "abcdef", RegexOptions.None, 0, 0, false, string.Empty);
// Using beginning/end of string chars \A, \Z: Actual - "\\Aaaa\\w+zzz\\Z"
yield return (@"\Aaaa\w+zzz\Z", "aaaasdfajsdlfjzzza", RegexOptions.None, 0, 18, false, string.Empty);
// Anchors and multiline
yield return (@"^A$", "ABC\n", RegexOptions.Multiline, 0, 2, false, string.Empty);
// Using beginning/end of string chars \A, \Z: Actual - "\\Aaaa\\w+zzz\\Z"
yield return (@"\A(line2\n)line3\Z", "line2\nline3\n", RegexOptions.Multiline, 0, 12, true, "line2\nline3");
// Using beginning/end of string chars ^: Actual - "^b"
yield return ("^b", "ab", RegexOptions.None, 0, 2, false, string.Empty);
if (!RegexHelpers.IsNonBacktracking(engine))
{
// Actual - "(?<char>\\w)\\<char>"
yield return (@"(?<char>\w)\<char>", "aa", RegexOptions.None, 0, 2, true, "aa");
// Actual - "(?<43>\\w)\\43"
yield return (@"(?<43>\w)\43", "aa", RegexOptions.None, 0, 2, true, "aa");
// Actual - "abc(?(1)111|222)"
yield return ("(abbc)(?(1)111|222)", "abbc222", RegexOptions.None, 0, 7, false, string.Empty);
}
// "x" option. Removes unescaped whitespace from the pattern: Actual - " ([^/]+) ","x"
yield return (" ((.)+) #comment ", "abc", RegexOptions.IgnorePatternWhitespace, 0, 3, true, "abc");
// "x" option. Removes unescaped whitespace from the pattern. : Actual - "\x20([^/]+)\x20","x"
yield return ("\x20([^/]+)\x20\x20\x20\x20\x20\x20\x20", " abc ", RegexOptions.IgnorePatternWhitespace, 0, 10, true, " abc ");
// Turning on case insensitive option in mid-pattern : Actual - "aaa(?i:match this)bbb"
if ("i".ToUpper() == "I")
{
yield return ("aaa(?i:match this)bbb", "aaaMaTcH ThIsbbb", RegexOptions.None, 0, 16, true, "aaaMaTcH ThIsbbb");
}
yield return ("(?i:a)b(?i:c)d", "aaaaAbCdddd", RegexOptions.None, 0, 11, true, "AbCd");
yield return ("(?i:[\u0000-\u1000])[Bb]", "aaaaAbCdddd", RegexOptions.None, 0, 11, true, "Ab");
// Turning off case insensitive option in mid-pattern : Actual - "aaa(?-i:match this)bbb", "i"
yield return ("aAa(?-i:match this)bbb", "AaAmatch thisBBb", RegexOptions.IgnoreCase, 0, 16, true, "AaAmatch thisBBb");
// Turning on/off all the options at once : Actual - "aaa(?imnsx-imnsx:match this)bbb", "i"
yield return ("aaa(?imnsx-imnsx:match this)bbb", "AaAmatcH thisBBb", RegexOptions.IgnoreCase, 0, 16, false, string.Empty);
// Actual - "aaa(?#ignore this completely)bbb"
yield return ("aAa(?#ignore this completely)bbb", "aAabbb", RegexOptions.None, 0, 6, true, "aAabbb");
// Trying empty string: Actual "[a-z0-9]+", ""
yield return ("[a-z0-9]+", "", RegexOptions.None, 0, 0, false, string.Empty);
// Numbering pattern slots: "(?<1>\\d{3})(?<2>\\d{3})(?<3>\\d{4})"
yield return (@"(?<1>\d{3})(?<2>\d{3})(?<3>\d{4})", "8885551111", RegexOptions.None, 0, 10, true, "8885551111");
yield return (@"(?<1>\d{3})(?<2>\d{3})(?<3>\d{4})", "Invalid string", RegexOptions.None, 0, 14, false, string.Empty);
// Not naming pattern slots at all: "^(cat|chat)"
yield return ("^(cat|chat)", "cats are bad", RegexOptions.None, 0, 12, true, "cat");
yield return ("abc", "abc", RegexOptions.None, 0, 3, true, "abc");
yield return ("abc", "aBc", RegexOptions.None, 0, 3, false, string.Empty);
yield return ("abc", "aBc", RegexOptions.IgnoreCase, 0, 3, true, "aBc");
yield return (@"abc.*def", "abcghiDEF", RegexOptions.IgnoreCase, 0, 9, true, "abcghiDEF");
// Using *, +, ?, {}: Actual - "a+\\.?b*\\.?c{2}"
yield return (@"a+\.?b*\.+c{2}", "ab.cc", RegexOptions.None, 0, 5, true, "ab.cc");
yield return (@"[^a]+\.[^z]+", "zzzzz", RegexOptions.None, 0, 5, false, string.Empty);
// IgnoreCase
yield return ("AAA", "aaabbb", RegexOptions.IgnoreCase, 0, 6, true, "aaa");
yield return (@"\p{Lu}", "1bc", RegexOptions.IgnoreCase, 0, 3, true, "b");
yield return (@"\p{Ll}", "1bc", RegexOptions.IgnoreCase, 0, 3, true, "b");
yield return (@"\p{Lt}", "1bc", RegexOptions.IgnoreCase, 0, 3, true, "b");
yield return (@"\p{Lo}", "1bc", RegexOptions.IgnoreCase, 0, 3, false, string.Empty);
yield return (".[abc]", "xYZAbC", RegexOptions.IgnoreCase, 0, 6, true, "ZA");
yield return (".[abc]", "xYzXyZx", RegexOptions.IgnoreCase, 0, 6, false, "");
// "\D+"
yield return (@"\D+", "12321", RegexOptions.None, 0, 5, false, string.Empty);
// Groups
yield return ("(?<first_name>\\S+)\\s(?<last_name>\\S+)", "David Bau", RegexOptions.None, 0, 9, true, "David Bau");
// "^b"
yield return ("^b", "abc", RegexOptions.None, 0, 3, false, string.Empty);
// Trim leading and trailing whitespace
yield return (@"\s*(.*?)\s*$", " Hello World ", RegexOptions.None, 0, 13, true, " Hello World ");
if (!RegexHelpers.IsNonBacktracking(engine))
{
// Throws NotSupported with NonBacktracking engine because of the balancing group dog-0
yield return (@"(?<cat>cat)\w+(?<dog-0>dog)", "cat_Hello_World_dog", RegexOptions.None, 0, 19, false, string.Empty);
}
// Atomic Zero-Width Assertions \A \Z \z \b \B
yield return (@"\A(cat)\s+(dog)", "cat \n\n\ncat dog", RegexOptions.None, 0, 20, false, string.Empty);
yield return (@"\A(cat)\s+(dog)", "cat \n\n\ncat dog", RegexOptions.Multiline, 0, 20, false, string.Empty);
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (@"\A(cat)\s+(dog)", "cat \n\n\ncat dog", RegexOptions.ECMAScript, 0, 20, false, string.Empty);
}
yield return (@"(cat)\s+(dog)\Z", "cat dog\n\n\ncat", RegexOptions.None, 0, 15, false, string.Empty);
yield return (@"(cat)\s+(dog)\Z", "cat dog\n\n\ncat ", RegexOptions.Multiline, 0, 20, false, string.Empty);
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (@"(cat)\s+(dog)\Z", "cat dog\n\n\ncat ", RegexOptions.ECMAScript, 0, 20, false, string.Empty);
}
yield return (@"(cat)\s+(dog)\z", "cat dog\n\n\ncat", RegexOptions.None, 0, 15, false, string.Empty);
yield return (@"(cat)\s+(dog)\z", "cat dog\n\n\ncat ", RegexOptions.Multiline, 0, 20, false, string.Empty);
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (@"(cat)\s+(dog)\z", "cat dog\n\n\ncat ", RegexOptions.ECMAScript, 0, 20, false, string.Empty);
}
yield return (@"(cat)\s+(dog)\z", "cat \n\n\n dog\n", RegexOptions.None, 0, 16, false, string.Empty);
yield return (@"(cat)\s+(dog)\z", "cat \n\n\n dog\n", RegexOptions.Multiline, 0, 16, false, string.Empty);
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return (@"(cat)\s+(dog)\z", "cat \n\n\n dog\n", RegexOptions.ECMAScript, 0, 16, false, string.Empty);
}
yield return (@"\b@cat", "123START123;@catEND", RegexOptions.None, 0, 19, false, string.Empty);
yield return (@"\b<cat", "123START123'<catEND", RegexOptions.None, 0, 19, false, string.Empty);
yield return (@"\b,cat", "satwe,,,START',catEND", RegexOptions.None, 0, 21, false, string.Empty);
yield return (@"\b\[cat", "`12START123'[catEND", RegexOptions.None, 0, 19, false, string.Empty);
yield return (@"\B@cat", "123START123@catEND", RegexOptions.None, 0, 18, false, string.Empty);
yield return (@"\B<cat", "123START123<catEND", RegexOptions.None, 0, 18, false, string.Empty);
yield return (@"\B,cat", "satwe,,,START,catEND", RegexOptions.None, 0, 20, false, string.Empty);
yield return (@"\B\[cat", "`12START123[catEND", RegexOptions.None, 0, 18, false, string.Empty);
// Lazy operator Backtracking
yield return (@"http://([a-zA-z0-9\-]*\.?)*?(:[0-9]*)??/", "http://www.msn.com", RegexOptions.IgnoreCase, 0, 18, false, string.Empty);
// Grouping Constructs Invalid Regular Expressions
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return ("(?!)", "(?!)cat", RegexOptions.None, 0, 7, false, string.Empty);
yield return ("(?<!)", "(?<!)cat", RegexOptions.None, 0, 8, false, string.Empty);
}
// Alternation construct
yield return ("[^a-z0-9]etag|[^a-z0-9]digest", "this string has .digest as a substring", RegexOptions.None, 16, 7, true, ".digest");
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return ("(?(dog2))", "dog2", RegexOptions.None, 0, 4, true, string.Empty);
yield return ("(?(a:b))", "a", RegexOptions.None, 0, 1, true, string.Empty);
yield return ("(?(a:))", "a", RegexOptions.None, 0, 1, true, string.Empty);
yield return ("(?(cat)|dog)", "cat", RegexOptions.None, 0, 3, true, string.Empty);
yield return ("(?(cat)|dog)", "catdog", RegexOptions.None, 0, 6, true, string.Empty);
yield return ("(?(cat)|dog)", "oof", RegexOptions.None, 0, 3, false, string.Empty);
yield return ("(?(cat)dog1|dog2)", "catdog1", RegexOptions.None, 0, 7, false, string.Empty);
yield return ("(?(cat)dog1|dog2)", "catdog2", RegexOptions.None, 0, 7, true, "dog2");
yield return ("(?(cat)dog1|dog2)", "catdog1dog2", RegexOptions.None, 0, 11, true, "dog2");
yield return (@"(\w+|\d+)a+[ab]+", "123123aa", RegexOptions.None, 0, 8, true, "123123aa");
yield return ("(a|ab|abc|abcd)d", "abcd", RegexOptions.RightToLeft, 0, 4, true, "abcd");
yield return ("(?>(?:a|ab|abc|abcd))d", "abcd", RegexOptions.None, 0, 4, false, string.Empty);
yield return ("(?>(?:a|ab|abc|abcd))d", "abcd", RegexOptions.RightToLeft, 0, 4, true, "abcd");
}
yield return ("[^a-z0-9]etag|[^a-z0-9]digest", "this string has .digest as a substring", RegexOptions.None, 16, 7, true, ".digest");
// No Negation
yield return ("[abcd-[abcd]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return ("[1234-[1234]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// All Negation
yield return ("[^abcd-[^abcd]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return ("[^1234-[^1234]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// No Negation
yield return ("[a-z-[a-z]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return ("[0-9-[0-9]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// All Negation
yield return ("[^a-z-[^a-z]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return ("[^0-9-[^0-9]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// No Negation
yield return (@"[\w-[\w]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\W-[\W]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\s-[\s]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\S-[\S]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\d-[\d]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\D-[\D]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// All Negation
yield return (@"[^\w-[^\w]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\W-[^\W]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\s-[^\s]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\S-[^\S]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\d-[^\d]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\D-[^\D]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// MixedNegation
yield return (@"[^\w-[\W]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\w-[^\W]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\s-[\S]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\s-[^\S]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\d-[\D]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\d-[^\D]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// No Negation
yield return (@"[\p{Ll}-[\p{Ll}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\P{Ll}-[\P{Ll}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\p{Lu}-[\p{Lu}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\P{Lu}-[\P{Lu}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\p{Nd}-[\p{Nd}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\P{Nd}-[\P{Nd}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// All Negation
yield return (@"[^\p{Ll}-[^\p{Ll}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\P{Ll}-[^\P{Ll}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\p{Lu}-[^\p{Lu}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\P{Lu}-[^\P{Lu}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\p{Nd}-[^\p{Nd}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\P{Nd}-[^\P{Nd}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// MixedNegation
yield return (@"[^\p{Ll}-[\P{Ll}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\p{Ll}-[^\P{Ll}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\p{Lu}-[\P{Lu}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\p{Lu}-[^\P{Lu}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[^\p{Nd}-[\P{Nd}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
yield return (@"[\p{Nd}-[^\P{Nd}]]+", "abcxyzABCXYZ`!@#$%^&*()_-+= \t\n", RegexOptions.None, 0, 30, false, string.Empty);
// Character Class Substraction
yield return (@"[ab\-\[cd-[-[]]]]", "[]]", RegexOptions.None, 0, 3, false, string.Empty);
yield return (@"[ab\-\[cd-[-[]]]]", "-]]", RegexOptions.None, 0, 3, false, string.Empty);
yield return (@"[ab\-\[cd-[-[]]]]", "`]]", RegexOptions.None, 0, 3, false, string.Empty);
yield return (@"[ab\-\[cd-[-[]]]]", "e]]", RegexOptions.None, 0, 3, false, string.Empty);
yield return (@"[ab\-\[cd-[[]]]]", "']]", RegexOptions.None, 0, 3, false, string.Empty);
yield return (@"[ab\-\[cd-[[]]]]", "e]]", RegexOptions.None, 0, 3, false, string.Empty);
yield return (@"[a-[a-f]]", "abcdefghijklmnopqrstuvwxyz", RegexOptions.None, 0, 26, false, string.Empty);
// \c
if (!PlatformDetection.IsNetFramework) // missing fix for https://github.com/dotnet/runtime/issues/24759
{
yield return (@"(cat)(\c[*)(dog)", "asdlkcat\u00FFdogiwod", RegexOptions.None, 0, 15, false, string.Empty);
}
// Surrogate pairs split up into UTF-16 code units.
yield return (@"(\uD82F[\uDCA0-\uDCA3])", "\uD82F\uDCA2", RegexOptions.CultureInvariant, 0, 2, true, "\uD82F\uDCA2");
// Unicode text
foreach (RegexOptions options in new[] { RegexOptions.None, RegexOptions.RightToLeft, RegexOptions.IgnoreCase | RegexOptions.CultureInvariant })
{
if (engine != RegexEngine.NonBacktracking || options != RegexOptions.RightToLeft)
{
yield return ("\u05D0\u05D1\u05D2\u05D3(\u05D4\u05D5|\u05D6\u05D7|\u05D8)", "abc\u05D0\u05D1\u05D2\u05D3\u05D4\u05D5def", options, 3, 6, true, "\u05D0\u05D1\u05D2\u05D3\u05D4\u05D5");
yield return ("\u05D0(\u05D4\u05D5|\u05D6\u05D7|\u05D8)", "\u05D0\u05D8", options, 0, 2, true, "\u05D0\u05D8");
yield return ("\u05D0(?:\u05D1|\u05D2|\u05D3)", "\u05D0\u05D2", options, 0, 2, true, "\u05D0\u05D2");
yield return ("\u05D0(?:\u05D1|\u05D2|\u05D3)", "\u05D0\u05D4", options, 0, 0, false, "");
}
}
// .* : Case sensitive
yield return (@".*\nfoo", "This shouldn't match", RegexOptions.None, 0, 20, false, "");
yield return (@"a.*\nfoo", "This shouldn't match", RegexOptions.None, 0, 20, false, "");
yield return (@".*\nFoo", $"\nFooThis should match", RegexOptions.None, 0, 21, true, "\nFoo");
yield return (@".*\nfoo", "\nfooThis should match", RegexOptions.None, 4, 17, false, "");
yield return (@".*\dfoo", "This shouldn't match", RegexOptions.None, 0, 20, false, "");
yield return (@".*\dFoo", "This1Foo should match", RegexOptions.None, 0, 21, true, "This1Foo");
yield return (@".*\dFoo", "This1foo should 2Foo match", RegexOptions.None, 0, 26, true, "This1foo should 2Foo");
yield return (@".*\dFoo", "This1foo shouldn't 2foo match", RegexOptions.None, 0, 29, false, "");
yield return (@".*\dfoo", "This1foo shouldn't 2foo match", RegexOptions.None, 24, 5, false, "");
yield return (@".*\dfoo", "1fooThis1foo should 1foo match", RegexOptions.None, 4, 9, true, "This1foo");
yield return (@".*\dfoo", "This shouldn't match 1foo", RegexOptions.None, 0, 20, false, "");
// Turkish case sensitivity
yield return (@"[\u0120-\u0130]", "\u0130", RegexOptions.None, 0, 1, true, "\u0130");
// .* : Case insensitive
yield return (@".*\nFoo", "\nfooThis should match", RegexOptions.IgnoreCase, 0, 21, true, "\nfoo");
yield return (@".*\dFoo", "This1foo should match", RegexOptions.IgnoreCase, 0, 21, true, "This1foo");
yield return (@".*\dFoo", "This1foo should 2FoO match", RegexOptions.IgnoreCase, 0, 26, true, "This1foo should 2FoO");
yield return (@".*\dFoo", "This1Foo should 2fOo match", RegexOptions.IgnoreCase, 0, 26, true, "This1Foo should 2fOo");
yield return (@".*\dfoo", "1fooThis1FOO should 1foo match", RegexOptions.IgnoreCase, 4, 9, true, "This1FOO");
if (!RegexHelpers.IsNonBacktracking(engine))
{
// RightToLeft
yield return (@"foo\d+", "0123456789foo4567890foo ", RegexOptions.RightToLeft, 0, 32, true, "foo4567890");
yield return (@"foo\d+", "0123456789foo4567890foo ", RegexOptions.RightToLeft, 10, 22, true, "foo4567890");
yield return (@"foo\d+", "0123456789foo4567890foo ", RegexOptions.RightToLeft, 10, 4, true, "foo4");
yield return (@"foo\d+", "0123456789foo4567890foo ", RegexOptions.RightToLeft, 10, 3, false, string.Empty);
yield return (@"foo\d+", "0123456789foo4567890foo ", RegexOptions.RightToLeft, 11, 21, false, string.Empty);
yield return (@"\s+\d+", "sdf 12sad", RegexOptions.RightToLeft, 0, 9, true, " 12");
yield return (@"\s+\d+", " asdf12 ", RegexOptions.RightToLeft, 0, 6, false, string.Empty);
yield return ("aaa", "aaabbb", RegexOptions.None, 3, 3, false, string.Empty);
yield return ("abc|def", "123def456", RegexOptions.RightToLeft | RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 9, true, "def");
// .* : RTL, Case-sensitive
yield return (@".*\nfoo", "This shouldn't match", RegexOptions.None | RegexOptions.RightToLeft, 0, 20, false, "");
yield return (@".*\nfoo", "This should matchfoo\n", RegexOptions.None | RegexOptions.RightToLeft, 4, 13, false, "");
yield return (@"a.*\nfoo", "This shouldn't match", RegexOptions.None | RegexOptions.RightToLeft, 0, 20, false, "");
yield return (@".*\nFoo", $"This should match\nFoo", RegexOptions.None | RegexOptions.RightToLeft, 0, 21, true, "This should match\nFoo");
yield return (@".*\dfoo", "This shouldn't match", RegexOptions.None | RegexOptions.RightToLeft, 0, 20, false, "");
yield return (@".*\dFoo", "This1Foo should match", RegexOptions.None | RegexOptions.RightToLeft, 0, 21, true, "This1Foo");
yield return (@".*\dFoo", "This1foo should 2Foo match", RegexOptions.None | RegexOptions.RightToLeft, 0, 26, true, "This1foo should 2Foo");
yield return (@".*\dFoo", "This1foo shouldn't 2foo match", RegexOptions.None | RegexOptions.RightToLeft, 0, 29, false, "");
yield return (@".*\dfoo", "This1foo shouldn't 2foo match", RegexOptions.None | RegexOptions.RightToLeft, 19, 0, false, "");
yield return (@".*\dfoo", "1fooThis2foo should 1foo match", RegexOptions.None | RegexOptions.RightToLeft, 8, 4, true, "2foo");
yield return (@".*\dfoo", "This shouldn't match 1foo", RegexOptions.None | RegexOptions.RightToLeft, 0, 20, false, "");
// .* : RTL, case insensitive
yield return (@".*\nFoo", "\nfooThis should match", RegexOptions.IgnoreCase | RegexOptions.RightToLeft, 0, 21, true, "\nfoo");
yield return (@".*\dFoo", "This1foo should match", RegexOptions.IgnoreCase | RegexOptions.RightToLeft, 0, 21, true, "This1foo");
yield return (@".*\dFoo", "This1foo should 2FoO match", RegexOptions.IgnoreCase | RegexOptions.RightToLeft, 0, 26, true, "This1foo should 2FoO");
yield return (@".*\dFoo", "This1Foo should 2fOo match", RegexOptions.IgnoreCase | RegexOptions.RightToLeft, 0, 26, true, "This1Foo should 2fOo");
yield return (@".*\dfoo", "1fooThis2FOO should 1foo match", RegexOptions.IgnoreCase | RegexOptions.RightToLeft, 8, 4, true, "2FOO");
yield return (@"[\w\s].*", "1fooThis2FOO should 1foo match", RegexOptions.IgnoreCase | RegexOptions.RightToLeft, 0, 30, true, "1fooThis2FOO should 1foo match");
yield return (@"i.*", "1fooThis2FOO should 1foo match", RegexOptions.IgnoreCase | RegexOptions.RightToLeft, 0, 30, true, "is2FOO should 1foo match");
}
// [ActiveIssue("https://github.com/dotnet/runtime/issues/36149")]
//if (PlatformDetection.IsNetCore)
//{
// // Unicode symbols in character ranges. These are chars whose lowercase values cannot be found by using the offsets specified in s_lcTable.
// yield return (@"^(?i:[\u00D7-\u00D8])$", '\u00F7'.ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, false, "");
// yield return (@"^(?i:[\u00C0-\u00DE])$", '\u00F7'.ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, false, "");
// yield return (@"^(?i:[\u00C0-\u00DE])$", ((char)('\u00C0' + 32)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, true, ((char)('\u00C0' + 32)).ToString());
// yield return (@"^(?i:[\u00C0-\u00DE])$", ((char)('\u00DE' + 32)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, true, ((char)('\u00DE' + 32)).ToString());
// yield return (@"^(?i:[\u0391-\u03AB])$", ((char)('\u03A2' + 32)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, false, "");
// yield return (@"^(?i:[\u0391-\u03AB])$", ((char)('\u0391' + 32)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, true, ((char)('\u0391' + 32)).ToString());
// yield return (@"^(?i:[\u0391-\u03AB])$", ((char)('\u03AB' + 32)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, true, ((char)('\u03AB' + 32)).ToString());
// yield return (@"^(?i:[\u1F18-\u1F1F])$", ((char)('\u1F1F' - 8)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, false, "");
// yield return (@"^(?i:[\u1F18-\u1F1F])$", ((char)('\u1F18' - 8)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, true, ((char)('\u1F18' - 8)).ToString());
// yield return (@"^(?i:[\u10A0-\u10C5])$", ((char)('\u10A0' + 7264)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, true, ((char)('\u10A0' + 7264)).ToString());
// yield return (@"^(?i:[\u10A0-\u10C5])$", ((char)('\u1F1F' + 48)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, false, "");
// yield return (@"^(?i:[\u24B6-\u24D0])$", ((char)('\u24D0' + 26)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, false, "");
// yield return (@"^(?i:[\u24B6-\u24D0])$", ((char)('\u24CF' + 26)).ToString(), RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, 0, 1, true, ((char)('\u24CF' + 26)).ToString());
//}
// Long inputs
string longCharacterRange = string.Concat(Enumerable.Range(1, 0x2000).Select(c => (char)c));
foreach (RegexOptions options in new[] { RegexOptions.None, RegexOptions.IgnoreCase })
{
yield return ("\u1000", longCharacterRange, options, 0, 0x2000, true, "\u1000");
yield return ("[\u1000-\u1001]", longCharacterRange, options, 0, 0x2000, true, "\u1000");
yield return ("[\u0FF0-\u0FFF][\u1000-\u1001]", longCharacterRange, options, 0, 0x2000, true, "\u0FFF\u1000");
yield return ("\uA640", longCharacterRange, options, 0, 0x2000, false, "");
yield return ("[\u3000-\u3001]", longCharacterRange, options, 0, 0x2000, false, "");
yield return ("[\uA640-\uA641][\u3000-\u3010]", longCharacterRange, options, 0, 0x2000, false, "");
if (!RegexHelpers.IsNonBacktracking(engine))
{
yield return ("\u1000", longCharacterRange, options | RegexOptions.RightToLeft, 0, 0x2000, true, "\u1000");
yield return ("[\u1000-\u1001]", longCharacterRange, options | RegexOptions.RightToLeft, 0, 0x2000, true, "\u1001");
yield return ("[\u1000][\u1001-\u1010]", longCharacterRange, options, 0, 0x2000, true, "\u1000\u1001");
yield return ("\uA640", longCharacterRange, options | RegexOptions.RightToLeft, 0, 0x2000, false, "");
yield return ("[\u3000-\u3001][\uA640-\uA641]", longCharacterRange, options | RegexOptions.RightToLeft, 0, 0x2000, false, "");
}
}
foreach (RegexOptions options in new[] { RegexOptions.None, RegexOptions.Singleline })
{
yield return (@"\W.*?\D", "seq 012 of 3 digits", options, 0, 19, true, " 012 ");
yield return (@"\W.+?\D", "seq 012 of 3 digits", options, 0, 19, true, " 012 ");
yield return (@"\W.{1,7}?\D", "seq 012 of 3 digits", options, 0, 19, true, " 012 ");
yield return (@"\W.{1,2}?\D", "seq 012 of 3 digits", options, 0, 19, true, " of");
yield return (@"\W.*?\b", "digits:0123456789", options, 0, 17, true, ":");
yield return (@"\B.*?\B", "e.g:abc", options, 0, 7, true, "");
yield return (@"\B\W+?", "e.g:abc", options, 0, 7, false, "");
yield return (@"\B\W*?", "e.g:abc", options, 0, 7, true, "");
// While not lazy loops themselves, variants of the prior case that should give same results here
yield return (@"\B\W*", "e.g:abc", options, 0, 7, true, "");
yield return (@"\B\W?", "e.g:abc", options, 0, 7, true, "");
//mixed lazy and eager counting
yield return ("z(a{0,5}|a{0,10}?)", "xyzaaaaaaaaaxyz", options, 0, 15, true, "zaaaaa");
}
}
}
[Theory]
[MemberData(nameof(Match_MemberData))]
public void Match(RegexEngine engine, string pattern, string input, RegexOptions options, Regex r, int beginning, int length, bool expectedSuccess, string expectedValue)
{
bool isDefaultStart = RegexHelpers.IsDefaultStart(input, options, beginning);
bool isDefaultCount = RegexHelpers.IsDefaultCount(input, options, length);
// Test instance method overloads
if (isDefaultStart && isDefaultCount)
{
VerifyMatch(r.Match(input));
Assert.Equal(expectedSuccess, r.IsMatch(input));
}
if (beginning + length == input.Length && (options & RegexOptions.RightToLeft) == 0)
{
VerifyMatch(r.Match(input, beginning));
}
VerifyMatch(r.Match(input, beginning, length));
// Test static method overloads
if (isDefaultStart && isDefaultCount)
{
switch (engine)
{
case RegexEngine.Interpreter:
case RegexEngine.Compiled:
case RegexEngine.NonBacktracking:
VerifyMatch(Regex.Match(input, pattern, options | RegexHelpers.OptionsFromEngine(engine)));
Assert.Equal(expectedSuccess, Regex.IsMatch(input, pattern, options | RegexHelpers.OptionsFromEngine(engine)));
break;
}
}
void VerifyMatch(Match match)
{
Assert.Equal(expectedSuccess, match.Success);
RegexAssert.Equal(expectedValue, match);
// Groups can never be empty
Assert.True(match.Groups.Count >= 1);
if (!RegexHelpers.IsNonBacktracking(engine))
{
Assert.Equal(expectedSuccess, match.Groups[0].Success);
RegexAssert.Equal(expectedValue, match.Groups[0]);
}
}
}
private async Task CreateAndMatch(RegexEngine engine, string pattern, string input, RegexOptions options, int beginning, int length, bool expectedSuccess, string expectedValue)
{
Regex r = await RegexHelpers.GetRegexAsync(engine, pattern, options);
Match(engine, pattern, input, options, r, beginning, length, expectedSuccess, expectedValue);
}
public static IEnumerable<object[]> Match_VaryingLengthStrings_MemberData()
{
foreach (RegexEngine engine in RegexHelpers.AvailableEngines)
{
foreach (int length in new[] { 2, 3, 7, 8, 9, 64 })
{
yield return new object[] { engine, RegexOptions.None, length };
yield return new object[] { engine, RegexOptions.IgnoreCase, length };
yield return new object[] { engine, RegexOptions.IgnoreCase | RegexOptions.CultureInvariant, length };
}
}
}
[SkipOnTargetFramework(TargetFrameworkMonikers.NetFramework, "Takes several minutes on .NET Framework")]
[Theory]
[MemberData(nameof(Match_VaryingLengthStrings_MemberData))]
public async Task Match_VaryingLengthStrings(RegexEngine engine, RegexOptions options, int length)
{
bool caseInsensitive = (options & RegexOptions.IgnoreCase) != 0;
string pattern = "[123]" + string.Concat(Enumerable.Range(0, length).Select(i => (char)('A' + (i % 26))));
string input = "2" + string.Concat(Enumerable.Range(0, length).Select(i => (char)((caseInsensitive ? 'a' : 'A') + (i % 26))));
Regex r = await RegexHelpers.GetRegexAsync(engine, pattern, options);
Match(engine, pattern, input, options, r, 0, input.Length, expectedSuccess: true, expectedValue: input);
}
[SkipOnTargetFramework(TargetFrameworkMonikers.NetFramework, "Takes several minutes on .NET Framework")]
[OuterLoop("Takes several seconds")]
[Theory]
[MemberData(nameof(RegexHelpers.AvailableEngines_MemberData), MemberType = typeof(RegexHelpers))]
public async Task Match_VaryingLengthStrings_Huge(RegexEngine engine)
{
await Match_VaryingLengthStrings(engine, RegexOptions.None, 100_000);
}
public static IEnumerable<object[]> Match_DeepNesting_MemberData()
{
foreach (RegexEngine engine in RegexHelpers.AvailableEngines)
{
if (RegexHelpers.IsNonBacktracking(engine))
{
// expression uses atomic group
continue;
}
yield return new object[] { engine, 1 };
yield return new object[] { engine, 10 };
yield return new object[] { engine, 100 };
}
}
[Theory]
[MemberData(nameof(Match_DeepNesting_MemberData))]
public async void Match_DeepNesting(RegexEngine engine, int count)
{
const string Start = @"((?>abc|(?:def[ghi]", End = @")))";
const string Match = "defg";
string pattern = string.Concat(Enumerable.Repeat(Start, count)) + string.Concat(Enumerable.Repeat(End, count));
string input = string.Concat(Enumerable.Repeat(Match, count));
Regex r = await RegexHelpers.GetRegexAsync(engine, pattern);
Match m = r.Match(input);
Assert.True(m.Success);
RegexAssert.Equal(input, m);
Assert.Equal(count + 1, m.Groups.Count);
}
[Theory]
[MemberData(nameof(RegexHelpers.AvailableEngines_MemberData), MemberType = typeof(RegexHelpers))]
public async Task Match_Timeout(RegexEngine engine)
{
Regex regex = await RegexHelpers.GetRegexAsync(engine, @"\p{Lu}", RegexOptions.IgnoreCase, TimeSpan.FromHours(1));
Match match = regex.Match("abc");
Assert.True(match.Success);
RegexAssert.Equal("a", match);
}
/// <summary>
/// Test that timeout exception is being thrown.
/// </summary>
[Theory]
[MemberData(nameof(RegexHelpers.AvailableEngines_MemberData), MemberType = typeof(RegexHelpers))]
private async Task Match_TestThatTimeoutHappens(RegexEngine engine)
{
var rnd = new Random(42);
var chars = new char[1_000_000];
for (int i = 0; i < chars.Length; i++)
{
byte b = (byte)rnd.Next(0, 256);
chars[i] = b < 200 ? 'a' : (char)b;
}
string input = new string(chars);
Regex re = await RegexHelpers.GetRegexAsync(engine, @"a.{20}$", RegexOptions.None, TimeSpan.FromMilliseconds(10));
Assert.Throws<RegexMatchTimeoutException>(() => { re.Match(input); });
}
[Theory]
[MemberData(nameof(RegexHelpers.AvailableEngines_MemberData), MemberType = typeof(RegexHelpers))]
public async Task Match_Timeout_Throws(RegexEngine engine)
{
if (RegexHelpers.IsNonBacktracking(engine))
{
// test relies on backtracking taking a long time
return;
}
const string Pattern = @"^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@(([0-9a-zA-Z])+([-\w]*[0-9a-zA-Z])*\.)+[a-zA-Z]{2,9})$";
string input = new string('a', 50) + "@a.a";
Regex r = await RegexHelpers.GetRegexAsync(engine, Pattern, RegexOptions.None, TimeSpan.FromMilliseconds(100));
Assert.Throws<RegexMatchTimeoutException>(() => r.Match(input));
}
// TODO: Figure out what to do with default timeouts for source generated regexes
[ConditionalTheory(typeof(RemoteExecutor), nameof(RemoteExecutor.IsSupported))]
[InlineData(RegexOptions.None)]
[InlineData(RegexOptions.None | RegexHelpers.RegexOptionDebug)]
[InlineData(RegexOptions.Compiled)]
[InlineData(RegexOptions.Compiled | RegexHelpers.RegexOptionDebug)]
public void Match_DefaultTimeout_Throws(RegexOptions options)
{
RemoteExecutor.Invoke(optionsString =>
{
const string Pattern = @"^([0-9a-zA-Z]([-.\w]*[0-9a-zA-Z])*@(([0-9a-zA-Z])+([-\w]*[0-9a-zA-Z])*\.)+[a-zA-Z]{2,9})$";
string input = new string('a', 50) + "@a.a";
AppDomain.CurrentDomain.SetData(RegexHelpers.DefaultMatchTimeout_ConfigKeyName, TimeSpan.FromMilliseconds(100));
if ((RegexOptions)int.Parse(optionsString, CultureInfo.InvariantCulture) == RegexOptions.None)
{
Assert.Throws<RegexMatchTimeoutException>(() => new Regex(Pattern).Match(input));
Assert.Throws<RegexMatchTimeoutException>(() => new Regex(Pattern).IsMatch(input));
Assert.Throws<RegexMatchTimeoutException>(() => new Regex(Pattern).Matches(input).Count);
Assert.Throws<RegexMatchTimeoutException>(() => Regex.Match(input, Pattern));
Assert.Throws<RegexMatchTimeoutException>(() => Regex.IsMatch(input, Pattern));
Assert.Throws<RegexMatchTimeoutException>(() => Regex.Matches(input, Pattern).Count);
}
Assert.Throws<RegexMatchTimeoutException>(() => new Regex(Pattern, (RegexOptions)int.Parse(optionsString, CultureInfo.InvariantCulture)).Match(input));
Assert.Throws<RegexMatchTimeoutException>(() => new Regex(Pattern, (RegexOptions)int.Parse(optionsString, CultureInfo.InvariantCulture)).IsMatch(input));
Assert.Throws<RegexMatchTimeoutException>(() => new Regex(Pattern, (RegexOptions)int.Parse(optionsString, CultureInfo.InvariantCulture)).Matches(input).Count);
Assert.Throws<RegexMatchTimeoutException>(() => Regex.Match(input, Pattern, (RegexOptions)int.Parse(optionsString, CultureInfo.InvariantCulture)));
Assert.Throws<RegexMatchTimeoutException>(() => Regex.IsMatch(input, Pattern, (RegexOptions)int.Parse(optionsString, CultureInfo.InvariantCulture)));
Assert.Throws<RegexMatchTimeoutException>(() => Regex.Matches(input, Pattern, (RegexOptions)int.Parse(optionsString, CultureInfo.InvariantCulture)).Count);
}, ((int)options).ToString(CultureInfo.InvariantCulture)).Dispose();
}
// TODO: Figure out what to do with default timeouts for source generated regexes
[Theory]
[InlineData(RegexOptions.None)]
[InlineData(RegexOptions.Compiled)]
public void Match_CachedPattern_NewTimeoutApplies(RegexOptions options)
{
const string PatternLeadingToLotsOfBacktracking = @"^(\w+\s?)*$";
Assert.True(Regex.IsMatch("", PatternLeadingToLotsOfBacktracking, options, TimeSpan.FromDays(1)));
var sw = Stopwatch.StartNew();
Assert.Throws<RegexMatchTimeoutException>(() => Regex.IsMatch("An input string that takes a very very very very very very very very very very very long time!", PatternLeadingToLotsOfBacktracking, options, TimeSpan.FromMilliseconds(1)));
Assert.InRange(sw.Elapsed.TotalSeconds, 0, 10); // arbitrary upper bound that should be well above what's needed with a 1ms timeout
}
// On 32-bit we can't test these high inputs as they cause OutOfMemoryExceptions.
// On Linux, we may get killed by the OOM Killer; on Windows, it will swap instead
[OuterLoop("Can take several seconds")]
[ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.Is64BitProcess), nameof(PlatformDetection.IsWindows))]
[MemberData(nameof(RegexHelpers.AvailableEngines_MemberData), MemberType = typeof(RegexHelpers))]
public async Task Match_Timeout_Loop_Throws(RegexEngine engine)
{
if (RegexHelpers.IsNonBacktracking(engine))
{
// [ActiveIssue("https://github.com/dotnet/runtime/issues/60623")]
return;
}
Regex regex = await RegexHelpers.GetRegexAsync(engine, @"a\s+", RegexOptions.None, TimeSpan.FromSeconds(1));
string input = "a" + new string(' ', 800_000_000) + " ";
Assert.Throws<RegexMatchTimeoutException>(() => regex.Match(input));
}
// On 32-bit we can't test these high inputs as they cause OutOfMemoryExceptions.
// On Linux, we may get killed by the OOM Killer; on Windows, it will swap instead
[OuterLoop("Can take several seconds")]
[ConditionalTheory(typeof(PlatformDetection), nameof(PlatformDetection.Is64BitProcess), nameof(PlatformDetection.IsWindows))]
[MemberData(nameof(RegexHelpers.AvailableEngines_MemberData), MemberType = typeof(RegexHelpers))]
public async Task Match_Timeout_Repetition_Throws(RegexEngine engine)
{
int repetitionCount = 800_000_000;
Regex regex = await RegexHelpers.GetRegexAsync(engine, @"a\s{" + repetitionCount + "}", RegexOptions.None, TimeSpan.FromSeconds(1));
string input = @"a" + new string(' ', repetitionCount) + @"b";
Assert.Throws<RegexMatchTimeoutException>(() => regex.Match(input));
}
public static IEnumerable<object[]> Match_Advanced_TestData()
{
foreach (RegexEngine engine in RegexHelpers.AvailableEngines)
{
// \B special character escape: ".*\\B(SUCCESS)\\B.*"
yield return new object[]
{
engine,
@".*\B(SUCCESS)\B.*", "adfadsfSUCCESSadsfadsf", RegexOptions.None, 0, 22,
new CaptureData[]
{
new CaptureData("adfadsfSUCCESSadsfadsf", 0, 22),
new CaptureData("SUCCESS", 7, 7)
}
};
// Using |, (), ^, $, .: Actual - "^aaa(bb.+)(d|c)$"
yield return new object[]
{
engine,
"^aaa(bb.+)(d|c)$", "aaabb.cc", RegexOptions.None, 0, 8,
new CaptureData[]
{
new CaptureData("aaabb.cc", 0, 8),
new CaptureData("bb.c", 3, 4),
new CaptureData("c", 7, 1)
}
};
// Using greedy quantifiers: Actual - "(a+)(b*)(c?)"
yield return new object[]
{
engine,
"(a+)(b*)(c?)", "aaabbbccc", RegexOptions.None, 0, 9,
new CaptureData[]
{
new CaptureData("aaabbbc", 0, 7),
new CaptureData("aaa", 0, 3),
new CaptureData("bbb", 3, 3),
new CaptureData("c", 6, 1)
}
};
// Using lazy quantifiers: Actual - "(d+?)(e*?)(f??)"
// Interesting match from this pattern and input. If needed to go to the end of the string change the ? to + in the last lazy quantifier
yield return new object[]
{
engine,
"(d+?)(e*?)(f??)", "dddeeefff", RegexOptions.None, 0, 9,
new CaptureData[]
{
new CaptureData("d", 0, 1),
new CaptureData("d", 0, 1),
new CaptureData(string.Empty, 1, 0),
new CaptureData(string.Empty, 1, 0)
}
};
// Noncapturing group : Actual - "(a+)(?:b*)(ccc)"
yield return new object[]
{
engine,
"(a+)(?:b*)(ccc)", "aaabbbccc", RegexOptions.None, 0, 9,
new CaptureData[]
{
new CaptureData("aaabbbccc", 0, 9),
new CaptureData("aaa", 0, 3),
new CaptureData("ccc", 6, 3),
}
};
// Alternation constructs: Actual - "(111|aaa)"
yield return new object[]
{
engine,
"(111|aaa)", "aaa", RegexOptions.None, 0, 3,
new CaptureData[]
{
new CaptureData("aaa", 0, 3),
new CaptureData("aaa", 0, 3)
}
};
// Using "n" Regex option. Only explicitly named groups should be captured: Actual - "([0-9]*)\\s(?<s>[a-z_A-Z]+)", "n"
yield return new object[]
{
engine,
@"([0-9]*)\s(?<s>[a-z_A-Z]+)", "200 dollars", RegexOptions.ExplicitCapture, 0, 11,
new CaptureData[]
{
new CaptureData("200 dollars", 0, 11),
new CaptureData("dollars", 4, 7)
}
};
// Single line mode "s". Includes new line character: Actual - "([^/]+)","s"
yield return new object[]
{
engine,
"(.*)", "abc\nsfc", RegexOptions.Singleline, 0, 7,
new CaptureData[]
{
new CaptureData("abc\nsfc", 0, 7),
new CaptureData("abc\nsfc", 0, 7),
}
};
// "([0-9]+(\\.[0-9]+){3})"
yield return new object[]
{
engine,
@"([0-9]+(\.[0-9]+){3})", "209.25.0.111", RegexOptions.None, 0, 12,
new CaptureData[]
{
new CaptureData("209.25.0.111", 0, 12),
new CaptureData("209.25.0.111", 0, 12),
new CaptureData(".111", 8, 4, new CaptureData[]
{
new CaptureData(".25", 3, 3),
new CaptureData(".0", 6, 2),
new CaptureData(".111", 8, 4),
}),
}
};
// Groups and captures
yield return new object[]
{
engine,
@"(?<A1>a*)(?<A2>b*)(?<A3>c*)", "aaabbccccccccccaaaabc", RegexOptions.None, 0, 21,
new CaptureData[]
{
new CaptureData("aaabbcccccccccc", 0, 15),
new CaptureData("aaa", 0, 3),
new CaptureData("bb", 3, 2),
new CaptureData("cccccccccc", 5, 10)
}
};
yield return new object[]
{
engine,
@"(?<A1>A*)(?<A2>B*)(?<A3>C*)", "aaabbccccccccccaaaabc", RegexOptions.IgnoreCase, 0, 21,
new CaptureData[]
{
new CaptureData("aaabbcccccccccc", 0, 15),
new CaptureData("aaa", 0, 3),
new CaptureData("bb", 3, 2),
new CaptureData("cccccccccc", 5, 10)
}
};
// Using |, (), ^, $, .: Actual - "^aaa(bb.+)(d|c)$"
yield return new object[]
{
engine,
"^aaa(bb.+)(d|c)$", "aaabb.cc", RegexOptions.None, 0, 8,
new CaptureData[]
{
new CaptureData("aaabb.cc", 0, 8),
new CaptureData("bb.c", 3, 4),
new CaptureData("c", 7, 1)
}