Add additional tests covering SyntaxKindEx features

Author: sharwell

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

@@ -6,6 +6,7 @@ namespace StyleCop.Analyzers.Test.CSharp7.Lightup
     using System;
     using Microsoft.CodeAnalysis;
     using Microsoft.CodeAnalysis.CSharp;
+    using StyleCop.Analyzers.Helpers;
     using StyleCop.Analyzers.Lightup;
     using Xunit;
 
@@ -25,6 +26,9 @@ public void TestNull()
         public void TestExpression()
         {
             var syntaxNode = SyntaxFactory.ConstantPattern(SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression));
+            Assert.True(syntaxNode.IsKind(SyntaxKind.ConstantPattern));
+            Assert.True(syntaxNode.IsKind(SyntaxKindEx.ConstantPattern));
+
             var constantPatternSyntax = (ConstantPatternSyntaxWrapper)syntaxNode;
             Assert.Same(syntaxNode, constantPatternSyntax.SyntaxNode);
             Assert.Same(syntaxNode.Expression, constantPatternSyntax.Expression);

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

@@ -7,6 +7,7 @@ namespace StyleCop.Analyzers.Test.CSharp7.Lightup
     using Microsoft.CodeAnalysis;
     using Microsoft.CodeAnalysis.CSharp;
     using Microsoft.CodeAnalysis.CSharp.Syntax;
+    using StyleCop.Analyzers.Helpers;
     using StyleCop.Analyzers.Lightup;
     using Xunit;
 
@@ -30,6 +31,9 @@ public void TestProperties()
             var syntaxNode = SyntaxFactory.DeclarationPattern(
                 SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.IntKeyword)),
                 SyntaxFactory.DiscardDesignation());
+            Assert.True(syntaxNode.IsKind(SyntaxKind.DeclarationPattern));
+            Assert.True(syntaxNode.IsKind(SyntaxKindEx.DeclarationPattern));
+
             var declarationPatternSyntax = (DeclarationPatternSyntaxWrapper)syntaxNode;
             Assert.Same(syntaxNode, declarationPatternSyntax.SyntaxNode);
             Assert.Same(syntaxNode.Type, declarationPatternSyntax.Type);