Merge pull request #514 from SLaks/refactor-tests

Tests: Reuse decompiler roundtrip assertion code

ICSharpCode.Decompiler/Tests/DecompilerTestBase.cs

@@ -35,10 +35,8 @@ namespace ICSharpCode.Decompiler.Tests
 	{
 		protected static void ValidateFileRoundtrip(string samplesFileName)
 		{
-			var lines = File.ReadAllLines(Path.Combine(@"..\..\Tests", samplesFileName));
-			var testCode = RemoveIgnorableLines(lines);
-			var decompiledTestCode = RoundtripCode(testCode);
-			CodeAssert.AreEqual(testCode, decompiledTestCode);
+			var fullPath = Path.Combine(@"..\..\Tests", samplesFileName);
+			AssertRoundtripCode(fullPath);
 		}
 
 		static string RemoveIgnorableLines(IEnumerable<string> lines)
@@ -46,28 +44,25 @@ namespace ICSharpCode.Decompiler.Tests
 			return CodeSampleFileParser.ConcatLines(lines.Where(l => !CodeSampleFileParser.IsCommentOrBlank(l)));
 		}
 
-		/// <summary>
-		/// Compiles and decompiles a source code.
-		/// </summary>
-		/// <param name="code">The source code to copile.</param>
-		/// <returns>The decompilation result of compiled source code.</returns>
-		static string RoundtripCode(string code)
+		protected static void AssertRoundtripCode(string fileName, bool optimize = false, bool useDebug = false)
 		{
-			DecompilerSettings settings = new DecompilerSettings();
-			settings.FullyQualifyAmbiguousTypeNames = false;
-			AssemblyDefinition assembly = Compile(code);
-			AstBuilder decompiler = new AstBuilder(new DecompilerContext(assembly.MainModule) { Settings = settings });
+			var code = RemoveIgnorableLines(File.ReadLines(fileName));
+			AssemblyDefinition assembly = CompileLegacy(code, optimize, useDebug);
+
+			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));
-			return output.ToString();
+			CodeAssert.AreEqual(code, output.ToString());
 		}
 
-		static AssemblyDefinition Compile(string code)
+		protected static AssemblyDefinition CompileLegacy(string code, bool optimize, bool useDebug)
 		{
 			CSharpCodeProvider provider = new CSharpCodeProvider(new Dictionary<string, string> { { "CompilerVersion", "v4.0" } });
 			CompilerParameters options = new CompilerParameters();
+			options.CompilerOptions = "/unsafe /o" + (optimize ? "+" : "-") + (useDebug ? " /debug" : "");
 			options.ReferencedAssemblies.Add("System.Core.dll");
 			CompilerResults results = provider.CompileAssemblyFromSource(options, code);
 			try

ICSharpCode.Decompiler/Tests/Helpers/CodeAssert.cs

@@ -104,7 +104,7 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 
 		private static IEnumerable<string> NormalizeAndSplitCode(string input)
 		{
-			return input.Split(new[] { "\r\n", "\n\r", "\n", "\r" }, StringSplitOptions.None);
+			return input.Split(new[] { "\r\n", "\n\r", "\n", "\r" }, StringSplitOptions.RemoveEmptyEntries);
 		}
 	}
 }

ICSharpCode.Decompiler/Tests/TestRunner.cs

@@ -32,7 +32,7 @@ using NUnit.Framework;
 namespace ICSharpCode.Decompiler.Tests
 {
 	[TestFixture]
-	public class TestRunner
+	public class TestRunner : DecompilerTestBase
 	{
 		[Test]
 		public void Async()
@@ -67,7 +67,8 @@ namespace ICSharpCode.Decompiler.Tests
 		[Test]
 		public void ExceptionHandling()
 		{
-			TestFile(@"..\..\Tests\ExceptionHandling.cs", optimize: false);
+			AssertRoundtripCode(@"..\..\Tests\ExceptionHandling.cs", optimize: false);
+			AssertRoundtripCode(@"..\..\Tests\ExceptionHandling.cs", optimize: false);
 		}
 		
 		[Test]
@@ -85,7 +86,8 @@ namespace ICSharpCode.Decompiler.Tests
 		[Test]
 		public void ControlFlowWithDebug()
 		{
-			TestFile(@"..\..\Tests\ControlFlow.cs", optimize: false, useDebug: true);
+			AssertRoundtripCode(@"..\..\Tests\ControlFlow.cs", optimize: false, useDebug: true);
+			AssertRoundtripCode(@"..\..\Tests\ControlFlow.cs", optimize: false, useDebug: true);
 		}
 		
 		[Test]
@@ -180,42 +182,10 @@ namespace ICSharpCode.Decompiler.Tests
 		
 		static void TestFile(string fileName, bool useDebug = false)
 		{
-			TestFile(fileName, false, useDebug);
-			TestFile(fileName, true, useDebug);
-		}
-
-		static void TestFile(string fileName, bool optimize, bool useDebug = false)
-		{
-			string code = File.ReadAllText(fileName);
-			AssemblyDefinition assembly = Compile(code, optimize, useDebug);
-			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());
-		}
-
-		static AssemblyDefinition Compile(string code, bool optimize, bool useDebug)
-		{
-			CSharpCodeProvider provider = new CSharpCodeProvider(new Dictionary<string, string> { { "CompilerVersion", "v4.0" } });
-			CompilerParameters options = new CompilerParameters();
-			options.CompilerOptions = "/unsafe /o" + (optimize ? "+" : "-") + (useDebug ? " /debug": "");
-			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();
-			}
+			AssertRoundtripCode(fileName, optimize: false, useDebug: useDebug);
+			AssertRoundtripCode(fileName, optimize: true, useDebug: useDebug);
+			AssertRoundtripCode(fileName, optimize: false, useDebug: useDebug);
+			AssertRoundtripCode(fileName, optimize: true, useDebug: useDebug);
 		}
 	}
 }