Improved handling of token comparisons in tests

Author: sharwell

StyleCop.Analyzers/StyleCop.Analyzers.Test.CSharp7/Lightup/DiscardDesignationSyntaxWrapperTests.cs

@@ -19,6 +19,7 @@ public void TestNull()
             var discardDesignationSyntax = (DiscardDesignationSyntaxWrapper)syntaxNode;
             Assert.Null(discardDesignationSyntax.SyntaxNode);
             Assert.Throws<NullReferenceException>(() => discardDesignationSyntax.UnderscoreToken);
+            Assert.Throws<NullReferenceException>(() => discardDesignationSyntax.WithUnderscoreToken(SyntaxFactory.Token(SyntaxKind.UnderscoreToken)));
         }
 
         [Fact]
@@ -35,7 +36,7 @@ public void TestUnderscoreToken()
             discardDesignationSyntax = discardDesignationSyntax.WithUnderscoreToken(SpacingExtensions.WithoutTrivia(SyntaxFactory.Token(SyntaxKind.UnderscoreToken)));
             Assert.NotNull(discardDesignationSyntax.SyntaxNode);
             Assert.NotSame(syntaxNode, discardDesignationSyntax.SyntaxNode);
-            Assert.NotEqual(syntaxNode.UnderscoreToken, discardDesignationSyntax.UnderscoreToken);
+            Assert.False(syntaxNode.UnderscoreToken.IsEquivalentTo(discardDesignationSyntax.UnderscoreToken));
         }
 
         [Fact]

StyleCop.Analyzers/StyleCop.Analyzers.Test/Lightup/DiscardDesignationSyntaxWrapperTests.cs

@@ -18,6 +18,7 @@ public void TestNull()
             var discardDesignationSyntax = (DiscardDesignationSyntaxWrapper)syntaxNode;
             Assert.Null(discardDesignationSyntax.SyntaxNode);
             Assert.Throws<NullReferenceException>(() => discardDesignationSyntax.UnderscoreToken);
+            Assert.Throws<NullReferenceException>(() => discardDesignationSyntax.WithUnderscoreToken(SyntaxFactory.Token((SyntaxKind)SyntaxKindEx.UnderscoreToken)));
         }
 
         [Fact]