Add functional test to verify generated code is up to date (#1369).

test/Microsoft.AspNetCore.Server.Kestrel.FunctionalTests/GeneratedCodeTests.cs

@@ -0,0 +1,44 @@
+// Copyright (c) .NET Foundation. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+#if NETCOREAPP1_1
+
+using System.IO;
+using Xunit;
+
+namespace Microsoft.AspNetCore.Server.Kestrel.FunctionalTests
+{
+    public class GeneratedCodeTests
+    {
+        [Fact]
+        public void GeneratedCodeIsUpToDate()
+        {
+            const string frameHeadersGeneratedPath = "../../../../../src/Microsoft.AspNetCore.Server.Kestrel/Internal/Http/FrameHeaders.Generated.cs";
+            const string frameGeneratedPath = "../../../../../src/Microsoft.AspNetCore.Server.Kestrel/Internal/Http/Frame.Generated.cs";
+
+            var testFrameHeadersGeneratedPath = Path.GetTempFileName();
+            var testFrameGeneratedPath = Path.GetTempFileName();
+
+            try
+            {
+                var currentFrameHeadersGenerated = File.ReadAllText(frameHeadersGeneratedPath);
+                var currentFrameGenerated = File.ReadAllText(frameGeneratedPath);
+
+                CodeGenerator.Program.Run(testFrameHeadersGeneratedPath, testFrameGeneratedPath);
+
+                var testFrameHeadersGenerated = File.ReadAllText(testFrameHeadersGeneratedPath);
+                var testFrameGenerated = File.ReadAllText(testFrameGeneratedPath);
+
+                Assert.Equal(currentFrameHeadersGenerated, testFrameHeadersGenerated, ignoreLineEndingDifferences: true);
+                Assert.Equal(currentFrameGenerated, testFrameGenerated, ignoreLineEndingDifferences: true);
+            }
+            finally
+            {
+                File.Delete(testFrameHeadersGeneratedPath);
+                File.Delete(testFrameGeneratedPath);
+            }
+        }
+    }
+}
+
+#endif

test/Microsoft.AspNetCore.Server.Kestrel.FunctionalTests/Microsoft.AspNetCore.Server.Kestrel.FunctionalTests.csproj

@@ -35,6 +35,7 @@
   </ItemGroup>
 
   <ItemGroup Condition=" '$(TargetFramework)' == 'netcoreapp1.1' ">
+    <ProjectReference Include="..\..\tools\CodeGenerator\CodeGenerator.csproj" />
     <PackageReference Include="System.Net.NetworkInformation" Version="$(CoreFxVersion)" />
   </ItemGroup>
 

tools/CodeGenerator/Program.cs

@@ -10,36 +10,38 @@ namespace CodeGenerator
     {
         public static int Main(string[] args)
         {
-            var text0 = KnownHeaders.GeneratedFile();
+            if (args.Length < 1)
-            var text1 = FrameFeatureCollection.GeneratedFile();
+            {
+                Console.Error.WriteLine("Missing path to FrameHeaders.Generated.cs");
+                return 1;
+            }
+            else if (args.Length < 2)
+            {
+                Console.Error.WriteLine("Missing path to Frame.Generated.cs");
+                return 1;
+            }
 
-            if (args.Length == 1)
+            Run(args[0], args[1]);
-            {
-                var existing = File.Exists(args[0]) ? File.ReadAllText(args[0]) : "";
-                if (!string.Equals(text0, existing))
-                {
-                    File.WriteAllText(args[0], text0);
-                }
-            }
-            else if (args.Length == 2)
-            {
-                var existing0 = File.Exists(args[0]) ? File.ReadAllText(args[0]) : "";
-                if (!string.Equals(text0, existing0))
-                {
-                    File.WriteAllText(args[0], text0);
-                }
 
-                var existing1 = File.Exists(args[1]) ? File.ReadAllText(args[1]) : "";
-                if (!string.Equals(text1, existing1))
-                {
-                    File.WriteAllText(args[1], text1);
-                }
-            }
-            else
-            {
-                Console.WriteLine(text0);
-            }
             return 0;
         }
+
+        public static void Run(string knownHeadersPath, string frameFeaturesCollectionPath)
+        {
+            var knownHeadersContent = KnownHeaders.GeneratedFile();
+            var frameFeatureCollectionContent = FrameFeatureCollection.GeneratedFile();
+
+            var existingKnownHeaders = File.Exists(knownHeadersPath) ? File.ReadAllText(knownHeadersPath) : "";
+            if (!string.Equals(knownHeadersContent, existingKnownHeaders))
+            {
+                File.WriteAllText(knownHeadersPath, knownHeadersContent);
+            }
+
+            var existingFrameFeatureCollection = File.Exists(frameFeaturesCollectionPath) ? File.ReadAllText(frameFeaturesCollectionPath) : "";
+            if (!string.Equals(frameFeatureCollectionContent, existingFrameFeatureCollection))
+            {
+                File.WriteAllText(frameFeaturesCollectionPath, frameFeatureCollectionContent);
+            }
+        }
     }
 }