added test for file header decoration

Author: zitzltho

StyleCop.Analyzers/StyleCop.Analyzers.Test/DocumentationRules/SA1633UnitTests.cs

@@ -24,10 +24,24 @@ public class SA1633UnitTests : FileHeaderTestBase
     }
   }
 }
+";
+
+        private const string DecoratedXmlMultiLineHeaderTestSettings = @"
+{
+  ""settings"": {
+    ""documentationRules"": {
+      ""companyName"": ""FooCorp"",
+      ""copyrightText"": ""  Copyright (c) {companyName}. All rights reserved."",
+      ""headerDecoration"": ""-----------------------------------------------------------------------"",
+    }
+  }
+}
 ";
 
         private bool useNoXmlSettings;
 
+        private bool useDecoratedXmlMultiLineHeaderTestSettings;
+
         /// <summary>
         /// Verifies that the analyzer will report <see cref="FileHeaderAnalyzers.SA1633DescriptorMissing"/> for
         /// projects using XML headers (the default) when the file is completely missing a header.
@@ -167,6 +181,36 @@ namespace Foo
             await this.VerifyCSharpFixAsync(testCode, fixedCode).ConfigureAwait(false);
         }
 
+        /// <summary>
+        /// Verifies that a file without a header, but with leading trivia will produce the correct diagnostic message.
+        /// </summary>
+        /// <returns>A <see cref="Task"/> representing the asynchronous unit test.</returns>
+        [Fact]
+        public async Task TestMissingFileHeaderWithDecorationAsync()
+        {
+            var testCode = @"namespace Foo
+{
+}
+";
+            var fixedCode = @"// -----------------------------------------------------------------------
+// <copyright file=""Test0.cs"" company=""FooCorp"">
+//   Copyright (c) FooCorp. All rights reserved.
+// </copyright>
+// -----------------------------------------------------------------------
+
+namespace Foo
+{
+}
+";
+
+            this.useDecoratedXmlMultiLineHeaderTestSettings = true;
+
+            var expectedDiagnostic = this.CSharpDiagnostic(FileHeaderAnalyzers.SA1633DescriptorMissing).WithLocation(1, 1);
+            await this.VerifyCSharpDiagnosticAsync(testCode, expectedDiagnostic, CancellationToken.None).ConfigureAwait(false);
+            await this.VerifyCSharpDiagnosticAsync(fixedCode, EmptyDiagnosticResults, CancellationToken.None).ConfigureAwait(false);
+            await this.VerifyCSharpFixAsync(testCode, fixedCode).ConfigureAwait(false);
+        }
+
         /// <summary>
         /// Verifies that a file header without XML structure will produce the correct diagnostic message.
         /// </summary>
@@ -308,6 +352,11 @@ protected override string GetSettings()
                 return NoXmlMultiLineHeaderTestSettings;
             }
 
+            if (this.useDecoratedXmlMultiLineHeaderTestSettings)
+            {
+                return DecoratedXmlMultiLineHeaderTestSettings;
+            }
+
             return base.GetSettings();
         }