A few more regex test

src/libraries/System.IO.FileSystem/tests/File/EncryptDecrypt.cs

@@ -43,9 +43,11 @@ public static void EncryptDecrypt_Read()
                 {
                     File.Encrypt(tmpFileName);
                 }
-                catch (IOException e) when (e.HResult == unchecked((int)0x80070490))
+                catch (IOException e) when (e.HResult == unchecked((int)0x80070490) ||
+                                           (e.HResult == unchecked((int)0x80071776)))
                 {
                     // Ignore ERROR_NOT_FOUND 1168 (0x490). It is reported when EFS is disabled by domain policy.
+                    // Ignore ERROR_NO_USER_KEYS (0x1776). This occurs when no user key exists to encrypt with.
                     return;
                 }
 

src/libraries/System.Text.RegularExpressions/tests/RegexParserTests.cs

@@ -565,21 +565,6 @@ public partial class RegexParserTests
         [InlineData(@"\bgr[ae]y\b", RegexOptions.None, null)]
         [InlineData(@"\b((?# case sensitive comparison)D\w+)\s(?ixn)((?#case insensitive comparison)d\w+)\b", RegexOptions.None, null)]
         [InlineData(@"\{\d+(,-*\d+)*(\:\w{1,4}?)*\}(?x) # Looks for a composite format item.", RegexOptions.None, null)]
-        public void Parse(string pattern, RegexOptions options, object errorObj, int offset = -1)
-        {
-            RegexParseError? error = (RegexParseError?)errorObj;
-
-            Assert.True(error == null || offset > 0, "All tests must be given positive offsets, or null if no offset should be tested.");
-
-            // Parse the main tree and if parsing fails check if the supplied error matches.
-            ParseTree(pattern, options, error, offset);
-
-            // Assert that only ArgumentException might be thrown during parsing.
-            ParseSubTrees(pattern, options);
-        }
-
-        [Theory]
-        // Negative tests
         [InlineData(@"cat([a-\d]*)dog", RegexOptions.None, RegexParseError.ShorthandClassInCharacterRange, 9)]
         [InlineData(@"\k<1", RegexOptions.None, RegexParseError.UnrecognizedEscape, 2)]
         [InlineData(@"(?')", RegexOptions.None, RegexParseError.CaptureGroupNameInvalid, 3)]
@@ -716,67 +701,67 @@ public void Parse(string pattern, RegexOptions options, object errorObj, int off
         [InlineData("[a-z-[b][", RegexOptions.None, RegexParseError.UnterminatedBracket, 9)]
         [InlineData("(?()|||||)", RegexOptions.None, RegexParseError.AlternationHasTooManyConditions, 10)]
         [InlineData("[^]", RegexOptions.None, RegexParseError.UnterminatedBracket, 3)]
-        [InlineData("\\", RegexOptions.None, RegexParseError.UnescapedEndingBackslash, 1)]
         [InlineData("??", RegexOptions.None, RegexParseError.QuantifierAfterNothing, 1)]
         [InlineData("(?=*)", RegexOptions.None, RegexParseError.QuantifierAfterNothing, 4)]
         [InlineData("((((((*))))))", RegexOptions.None, RegexParseError.QuantifierAfterNothing, 7)]
-        public void ParseCheckOffset(string pattern, RegexOptions options, object errorObj, int offset)
+        public void ParseCheckOffset(string pattern, RegexOptions options, RegexParseError? error, int offset = -1)
         {
-            RegexParseError? error = (RegexParseError?)errorObj;
-
-            // Parse the main tree and if parsing fails check if the supplied error matches.
-            ParseTree(pattern, options, error, offset);
-
-            // Assert that only ArgumentException might be thrown during parsing.
-            ParseSubTrees(pattern, options);
-        }
-
-
-        private static void ParseSubTrees(string pattern, RegexOptions options)
-        {
-            // Trim the input from the right and make sure tree invariants hold
-            for (int i = pattern.Length - 1; i > 0; i--)
-            {
-                ParseSubTree(pattern.Substring(0, i), options);
-            }
-
-            // Trim the input from the left and make sure tree invariants hold
-            for (int i = 1; i < pattern.Length; i++)
-            {
-                ParseSubTree(pattern.Substring(i), options);
-            }
-
-            // Skip middles
-            for (int i = 1; i < pattern.Length; i++)
-            {
-                ParseSubTree(pattern.Substring(0, i) + pattern.Substring(i + 1), options);
-            }
+            Parse(pattern, options, error, offset);
         }
 
-        static void ParseTree(string pattern, RegexOptions options, RegexParseError? error, int offset)
+        private static void Parse(string pattern, RegexOptions options, RegexParseError? error, int offset = -1)
         {
             if (error != null)
             {
+                Assert.InRange(offset, 0, int.MaxValue);
                 Throws(error.Value, offset, () => new Regex(pattern, options));
                 return;
             }
 
+            Assert.Equal(-1, offset);
+
             // Nothing to assert here without having access to internals.
-            new Regex(pattern, options);
+            new Regex(pattern, options); // Does not throw
+
+            ParsePatternFragments(pattern, options);
         }
 
-        private static void ParseSubTree(string pattern, RegexOptions options)
+        private static void ParsePatternFragments(string pattern, RegexOptions options)
         {
-            try
+            // Trim the input in various places and parse.
+            // Verify that if it throws, it's the correct exception type
+            for (int i = pattern.Length - 1; i > 0; i--)
+            {
+                string str = pattern.Substring(0, i);
+                MayThrow(() => new Regex(str, options));
+            }
+
+            for (int i = 1; i < pattern.Length; i++)
             {
-                new Regex(pattern, options);
+                string str = pattern.Substring(i);
+                MayThrow(() => new Regex(str, options));
             }
-            catch (ArgumentException)
+
+            for (int i = 1; i < pattern.Length; i++)
             {
-                // We are fine with ArgumentExceptions being thrown during sub expression parsing.
+                string str = pattern.Substring(0, i) + pattern.Substring(i + 1);
+                MayThrow(() => new Regex(str, options));
             }
         }
 
+        /// <summary>
+        /// Checks that action throws either a RegexParseException or an ArgumentException depending on the
+        /// environment and the supplied error.
+        /// </summary>
+        /// <param name="error">The expected parse error</param>
+        /// <param name="action">The action to invoke.</param>
         static partial void Throws(RegexParseError error, int offset, Action action);
+
+        /// <summary>
+        /// Checks that action succeeds or throws either a RegexParseException or an ArgumentException depending on the
+        // environment and the action.
+        /// </summary>
+        /// <param name="action">The action to invoke.</param>
+        static partial void MayThrow(Action action);
     }
 }

src/libraries/System.Text.RegularExpressions/tests/RegexParserTests.netcoreapp.cs

@@ -11,15 +11,11 @@ namespace System.Text.RegularExpressions.Tests
     public partial class RegexParserTests
     {
         [Theory]
-        [InlineData(@"[a-\-]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
-        [InlineData(@"[a-\-b]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
-        [InlineData(@"[a-\-\-b]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
-        [InlineData(@"[a-\-\D]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
-        [InlineData(@"[a-\-\-\D]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
-        [InlineData(@"[a -\-\b]", RegexOptions.None, null, 5)]
-        // OutOfMemoryException
+
+        // Avoid OutOfMemoryException
         [InlineData("a{2147483647}", RegexOptions.None, null)]
         [InlineData("a{2147483647,}", RegexOptions.None, null)]
+
         [InlineData(@"(?(?N))", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 5)]
         [InlineData(@"(?(?i))", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 5)]
         [InlineData(@"(?(?I))", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 5)]
@@ -30,7 +26,6 @@ public partial class RegexParserTests
         [InlineData(@"(?(?X))", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 5)]
         [InlineData(@"(?(?n))", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 5)]
         [InlineData(@"(?(?m))", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 5)]
-        // IndexOutOfRangeException
         [InlineData("(?<-", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 3)]
         [InlineData("(?<-", RegexOptions.IgnorePatternWhitespace, RegexParseError.InvalidGroupingConstruct, 3)]
         [InlineData(@"^[^<>]*(((?'Open'<)[^<>]*)+((?'Close-Open'>)[^<>]*)+)*(?(Open)(?!))$", RegexOptions.None, null)]
@@ -90,8 +85,50 @@ public partial class RegexParserTests
         [InlineData("a{0,2147483648}", RegexOptions.None, RegexParseError.QuantifierOrCaptureGroupOutOfRange, 14)]
         // Surrogate pair which is parsed as [char,char-char,char] as we operate on UTF-16 code units.
         [InlineData("[\uD82F\uDCA0-\uD82F\uDCA3]", RegexOptions.IgnoreCase, RegexParseError.ReversedCharacterRange, 5)]
+
+        // Following are borrowed from Rust regex tests ============
+        // https://github.com/rust-lang/regex/blob/master/tests/noparse.rs
+        [InlineData(@"*", RegexOptions.None, RegexParseError.QuantifierAfterNothing, 1)]
+        [InlineData(@"[A-", RegexOptions.None, RegexParseError.UnterminatedBracket, 3)]
+        [InlineData(@"[A", RegexOptions.None, RegexParseError.UnterminatedBracket, 2)]
+        [InlineData(@"[\A]", RegexOptions.None, RegexParseError.UnrecognizedEscape, 3)]
+        [InlineData(@"[\z]", RegexOptions.None, RegexParseError.UnrecognizedEscape, 3)]
+        [InlineData(@"(", RegexOptions.None, RegexParseError.InsufficientClosingParentheses, 1)]
+        [InlineData(@")", RegexOptions.None, RegexParseError.InsufficientOpeningParentheses, 1)]
+        [InlineData(@"[a-Z]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 4)]
+        [InlineData(@"(?P<>a)", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 3)]
+        [InlineData(@"(?P<na-me>)", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 3)]
+        [InlineData(@"(?a)a", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 3)]
+        [InlineData(@"a{2,1}", RegexOptions.None, RegexParseError.ReversedQuantifierRange, 6)]
+        [InlineData(@"(?", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 2)]
+        [InlineData(@"\8", RegexOptions.None, RegexParseError.UndefinedNumberedReference, 2)]
+        [InlineData(@"\xG0", RegexOptions.None, RegexParseError.InsufficientOrInvalidHexDigits, 3)]
+        [InlineData(@"\xF", RegexOptions.None, RegexParseError.InsufficientOrInvalidHexDigits, 2)]
+        [InlineData(@"\x{fffg}", RegexOptions.None, RegexParseError.InsufficientOrInvalidHexDigits, 3)]
+        [InlineData(@"(?a)", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 3)]
+        [InlineData(@"(?)", RegexOptions.None, RegexParseError.QuantifierAfterNothing, 2)]
+        [InlineData(@"(?P<a>.)(?P<a>.)", RegexOptions.None, RegexParseError.InvalidGroupingConstruct, 3)]
+        [InlineData(@"[a-\A]", RegexOptions.None, RegexParseError.UnrecognizedEscape, 5)]
+        [InlineData(@"[a-\z]", RegexOptions.None, RegexParseError.UnrecognizedEscape, 5)]
+        [InlineData(@"[a-\b]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
+        [InlineData(@"[a-\-]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
+        [InlineData(@"[a-\-b]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
+        [InlineData(@"[a-\-\-b]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
+        [InlineData(@"[a-\-\D]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
+        [InlineData(@"[a-\-\-\D]", RegexOptions.None, RegexParseError.ReversedCharacterRange, 5)]
+        [InlineData(@"[a -\-\b]", RegexOptions.None, null)]
+        [InlineData(@"[\b]", RegexOptions.None, null)] // errors in rust: class_no_boundary
+        [InlineData(@"a{10000000}", RegexOptions.None, null)] // errors in rust: too_big
+        [InlineData(@"a{1001", RegexOptions.None, null)] // errors in rust: counted_no_close
+        [InlineData(@"a{-1,1}", RegexOptions.None, null)] // errors in rust: counted_nonnegative
+        [InlineData(@"\\", RegexOptions.None, null)] // errors in rust: unfinished_escape
+        [InlineData(@"(?-i-i)", RegexOptions.None, null)] // errors in rust: double_neg
+        [InlineData(@"(?i-)", RegexOptions.None, null)] // errors in rust: neg_empty
+        [InlineData(@"[a-[:lower:]]", RegexOptions.None, null)] // errors in rust: range_end_no_class
+        // End of Rust parser tests ==============
+
         [SkipOnTargetFramework(TargetFrameworkMonikers.NetFramework)]
-        public void Parse_Netcoreapp(string pattern, RegexOptions options, object error, int offset = -1)
+        public void Parse_Netcoreapp(string pattern, RegexOptions options, RegexParseError? error, int offset = -1)
         {
             Parse(pattern, options, error, offset);
         }
@@ -137,7 +174,7 @@ static partial void Throws(RegexParseError error, int offset, Action action)
                     return;
                 }
 
-                throw new XunitException($"Expected RegexParseException with error: ({error}) -> Actual error: {regexParseError})");
+                throw new XunitException($"Expected RegexParseException with error {error} offset {offset} -> Actual error: {regexParseError} offset {e.Offset})");
             }
             catch (Exception e)
             {
@@ -146,5 +183,18 @@ static partial void Throws(RegexParseError error, int offset, Action action)
 
             throw new XunitException($"Expected RegexParseException with error: ({error}) -> Actual: No exception thrown");
         }
+
+       /// <summary>
+        /// Checks that action succeeds or throws either a RegexParseException or an ArgumentException depending on the
+        // environment and the action.
+        /// </summary>
+        /// <param name="action">The action to invoke.</param>
+        static partial void MayThrow(Action action)
+        {
+            if (Record.Exception(action) is Exception e && e is not RegexParseException)
+            {
+                throw new XunitException($"Expected RegexParseException or no exception -> Actual: ({e})");
+            }
+        }
     }
 }

src/libraries/System.Text.RegularExpressions/tests/RegexParserTests.netfx.cs

@@ -11,7 +11,7 @@ namespace System.Text.RegularExpressions.Tests
     public partial class RegexParserTests
     {
         /// <summary>
-        /// Checks if action throws either a RegexParseException or an ArgumentException depending on the
+        /// Checks that action throws either a RegexParseException or an ArgumentException depending on the
         /// environment and the supplied error.
         /// </summary>
         /// <param name="error">The expected parse error</param>
@@ -28,11 +28,24 @@ static partial void Throws(RegexParseError error, int offset, Action action)
                 return;
             }
             catch (Exception e)
-            { 
+            {
                 throw new XunitException($"Expected ArgumentException -> Actual: {e}");
             }
 
             throw new XunitException($"Expected ArgumentException with error: ({error}) -> Actual: No exception thrown");
         }
+
+       /// <summary>
+        /// Checks that action succeeds or throws either a RegexParseException or an ArgumentException depending on the
+        // environment and the action.
+        /// </summary>
+        /// <param name="action">The action to invoke.</param>
+        static partial void MayThrow(Action action)
+        {
+            if (Record.Exception(action) is Exception e && e is not ArgumentException)
+            {
+                throw new XunitException($"Expected ArgumentException or no exception -> Actual: ({e})");
+            }
+        }
     }
 }

src/libraries/System.Text.RegularExpressions/tests/THIRD-PARTY-NOTICES.TXT

@@ -0,0 +1,38 @@
+.NET Runtime uses third-party libraries or other resources that may be
+distributed under licenses different than the .NET Runtime software.
+
+In the event that we accidentally failed to list a required notice, please
+bring it to our attention. Post an issue or email us:
+
+           [email protected]
+
+The attached notices are provided for information only.
+
+License notice for https://github.com/rust-lang/regex
+-------------------------------
+
+Copyright (c) 2014 The Rust Project Developers
+
+Permission is hereby granted, free of charge, to any
+person obtaining a copy of this software and associated
+documentation files (the "Software"), to deal in the
+Software without restriction, including without
+limitation the rights to use, copy, modify, merge,
+publish, distribute, sublicense, and/or sell copies of
+the Software, and to permit persons to whom the Software
+is furnished to do so, subject to the following
+conditions:
+
+The above copyright notice and this permission notice
+shall be included in all copies or substantial portions
+of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
+ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
+TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
+SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
+IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+DEALINGS IN THE SOFTWARE.