Fix StackOverflowException in StringAssert.DoesNotMatch (microsoft#806)

Author: quails4Eva

src/TestFramework/MSTest.Core/Assertions/StringAssert.cs

@@ -655,7 +655,7 @@ public static void DoesNotMatch(string value, Regex pattern)
         /// </exception>
         public static void DoesNotMatch(string value, Regex pattern, string message)
         {
-            DoesNotMatch(value, pattern, message);
+            DoesNotMatch(value, pattern, message, null);
         }
 
         /// <summary>

test/UnitTests/MSTest.Core.Unit.Tests/Assertions/StringAssertTests.cs

@@ -7,6 +7,7 @@ namespace Microsoft.VisualStudio.TestPlatform.TestFramework.UnitTests.Assertions
     extern alias FrameworkV2;
 
     using System;
+    using System.Text.RegularExpressions;
 
     using MSTestAdapter.TestUtilities;
     using Assert = FrameworkV1::Microsoft.VisualStudio.TestTools.UnitTesting.Assert;
@@ -60,6 +61,16 @@ public void StringAssertEndsWith()
             TestFrameworkV1.StringAssert.Contains(ex.Message, "StringAssert.EndsWith failed");
         }
 
+        [TestMethod]
+        public void StringAssertDoesNotMatch()
+        {
+            string actual = "The quick brown fox jumps over the lazy dog.";
+            Regex doesMatch = new Regex("quick brown fox");
+            var ex = ActionUtility.PerformActionAndReturnException(() => TestFrameworkV2.StringAssert.DoesNotMatch(actual, doesMatch));
+            Assert.IsNotNull(ex);
+            TestFrameworkV1.StringAssert.Contains(ex.Message, "StringAssert.DoesNotMatch failed");
+        }
+
         [TestMethod]
         public void StringAssertContainsIgnoreCase()
         {