Fix exception tests to match CoreCLR change (dotnet/corefx#38727)

Commit migrated from https://github.com/dotnet/corefx/commit/41f0787f93d6c51baf3cd90b39b6e572ce5c6582

diff --git a/src/libraries/System.Data.Common/tests/System/Data/Common/DbConnectionStringBuilderTest.cs b/src/libraries/System.Data.Common/tests/System/Data/Common/DbConnectionStringBuilderTest.cs
index a703b49..e02368a 100644 (file)
--- a/src/libraries/System.Data.Common/tests/System/Data/Common/DbConnectionStringBuilderTest.cs
+++ b/src/libraries/System.Data.Common/tests/System/Data/Common/DbConnectionStringBuilderTest.cs
@@ -99,7 +99,7 @@ namespace System.Data.Tests.Common
                     Assert.Equal(typeof(ArgumentException), ex.GetType());
                     Assert.Null(ex.InnerException);
                     Assert.NotNull(ex.Message);
-                    Assert.True(ex.Message.IndexOf("'" + keyword + "'") == -1);
+                    Assert.Contains(keyword, ex.Message);
                     Assert.Equal(keyword, ex.ParamName);
                 }
             }
@@ -302,7 +302,7 @@ namespace System.Data.Tests.Common
                     Assert.Equal(typeof(ArgumentException), ex.GetType());
                     Assert.Null(ex.InnerException);
                     Assert.NotNull(ex.Message);
-                    Assert.True(ex.Message.IndexOf("'" + keyword + "'") == -1);
+                    Assert.Contains(keyword, ex.Message);
                     Assert.Equal(keyword, ex.ParamName);
                 }