1 files changed, 89 insertions, 0 deletions
diff --git a/ICSharpCode.Decompiler/Tests/DecompilerTestBase.cs b/ICSharpCode.Decompiler/Tests/DecompilerTestBase.cs
new file mode 100644
index 00000000..659bb2be
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+++ b/ICSharpCode.Decompiler/Tests/DecompilerTestBase.cs
@@ -0,0 +1,89 @@
+// Copyright (c) AlphaSierraPapa for the SharpDevelop Team
+// 
+// Permission is hereby granted, free of charge, to any person obtaining a copy of this
+// software and associated documentation files (the "Software"), to deal in the Software
+// without restriction, including without limitation the rights to use, copy, modify, merge,
+// publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons
+// to whom the Software is furnished to do so, subject to the following conditions:
+// 
+// The above copyright notice and this permission notice shall be included in all copies or
+// substantial portions of the Software.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
+// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
+// PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
+// FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
+// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+
+using System;
+using System.CodeDom.Compiler;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+using ICSharpCode.Decompiler.Ast;
+using ICSharpCode.Decompiler.Tests.Helpers;
+using Microsoft.CSharp;
+using Mono.Cecil;
+using NUnit.Framework;
+
+namespace ICSharpCode.Decompiler.Tests
+{
+	public abstract class DecompilerTestBase
+	{
+		protected static void ValidateFileRoundtrip(string samplesFileName)
+		{
+			var fullPath = Path.Combine(@"..\..\Tests", samplesFileName);
+			AssertRoundtripCode(fullPath);
+		}
+
+		static string RemoveIgnorableLines(IEnumerable<string> lines)
+		{
+			return CodeSampleFileParser.ConcatLines(lines.Where(l => !CodeSampleFileParser.IsCommentOrBlank(l)));
+		}
+
+		protected static void AssertRoundtripCode(string fileName, bool optimize = false, bool useDebug = false, int compilerVersion = 4)
+		{
+			var code = RemoveIgnorableLines(File.ReadLines(fileName));
+			AssemblyDefinition assembly = CompileLegacy(code, optimize, useDebug, compilerVersion);
+
+			AstBuilder decompiler = new AstBuilder(new DecompilerContext(assembly.MainModule));
+			decompiler.AddAssembly(assembly);
+			new Helpers.RemoveCompilerAttribute().Run(decompiler.SyntaxTree);
+
+			StringWriter output = new StringWriter();
+			decompiler.GenerateCode(new PlainTextOutput(output));
+			CodeAssert.AreEqual(code, output.ToString());
+		}
+
+		protected static AssemblyDefinition CompileLegacy(string code, bool optimize, bool useDebug, int compilerVersion)
+		{
+			CSharpCodeProvider provider = new CSharpCodeProvider(new Dictionary<string, string> { { "CompilerVersion", "v" + new Version(compilerVersion, 0) } });
+			CompilerParameters options = new CompilerParameters();
+			options.CompilerOptions = "/unsafe /o" + (optimize ? "+" : "-") + (useDebug ? " /debug" : "");
+			if (compilerVersion >= 4)
+				options.ReferencedAssemblies.Add("System.Core.dll");
+			CompilerResults results = provider.CompileAssemblyFromSource(options, code);
+			try
+			{
+				if (results.Errors.Count > 0)
+				{
+					StringBuilder b = new StringBuilder("Compiler error:");
+					foreach (var error in results.Errors)
+					{
+						b.AppendLine(error.ToString());
+					}
+					throw new Exception(b.ToString());
+				}
+				return AssemblyDefinition.ReadAssembly(results.PathToAssembly);
+			}
+			finally
+			{
+				File.Delete(results.PathToAssembly);
+				results.TempFiles.Delete();
+			}
+		}
+	}
+}