public ComparisonTest(string filename, string[] stubbedAssemblies = null, TypeInfoProvider typeInfo = null)
        {
            Filename = Path.Combine(TestSourceFolder, filename);

            var sourceCode = File.ReadAllText(Filename);
            switch (Path.GetExtension(filename).ToLower()) {
                case ".cs":
                    Assembly = CompilerUtil.CompileCS(sourceCode, out TemporaryFiles);
                    break;
                case ".vb":
                    Assembly = CompilerUtil.CompileVB(sourceCode, out TemporaryFiles);
                    break;
                default:
                    throw new ArgumentException("Unsupported source file type for test");
            }

            var program = Assembly.GetType("Program");
            if (program == null)
                throw new Exception("Test missing 'Program' main class");

            TestMethod = program.GetMethod("Main");
            if (TestMethod == null)
                throw new Exception("Test missing 'Main' method of 'Program' main class");

            StubbedAssemblies = stubbedAssemblies;
            TypeInfo = typeInfo;
        }

        public void Analyze(TypeInfoProvider typeInfoProvider) {
            if (!Configuration.DeadCodeElimination.GetValueOrDefault(false))
                return;

            deadCodeInfo.TypeInfoProvider = typeInfoProvider;

            stopwatchElapsed = new Stopwatch();
            stopwatchElapsed.Start();

            var foundEntrypoints = from assembly in assemblyDefinitions
                                   from modules in assembly.Modules
                                   where modules.EntryPoint != null
                                   select modules.EntryPoint;

            deadCodeInfo.AddAssemblies(assemblyDefinitions);


            foreach (MethodDefinition method in foundEntrypoints)
            {
                deadCodeInfo.WalkMethod(method);
            }

            deadCodeInfo.ResolveVirtualMethodsCycle();

            stopwatchElapsed.Stop();
            Console.WriteLine("// Dead code analysis took {0} ms", stopwatchElapsed.ElapsedMilliseconds);
        }

        protected TypeInfoProvider MakeDefaultProvider () {
            if (DefaultTypeInfoProvider == null)
                // Construct a type info provider with default proxies loaded (kind of a hack)
                DefaultTypeInfoProvider = (new AssemblyTranslator(MakeConfiguration())).GetTypeInfoProvider();

            return DefaultTypeInfoProvider.Clone();
        }

        public void Analyze (AssemblyTranslator translator, AssemblyDefinition[] assemblies, TypeInfoProvider typeInfoProvider) {
            if (!Configuration.DeadCodeElimination)
                return;

            assemblyDefinitions.Clear();
            assemblyDefinitions.AddRange(assemblies);

            deadCodeInfo.TypeInfoProvider = typeInfoProvider;

            stopwatchElapsed = new Stopwatch();
            stopwatchElapsed.Start();

            var foundEntrypoints = from assembly in assemblyDefinitions
                                   from modules in assembly.Modules
                                   where modules.EntryPoint != null
                                   select modules.EntryPoint;

            deadCodeInfo.AddAssemblies(assemblyDefinitions);


            foreach (MethodDefinition method in foundEntrypoints)
            {
                deadCodeInfo.WalkMethod(method);
            }

            deadCodeInfo.FinishProcessing();

            stopwatchElapsed.Stop();
            Console.WriteLine("// Dead code analysis took {0} ms", stopwatchElapsed.ElapsedMilliseconds);
        }

 public EmulateStructAssignment(TypeSystem typeSystem, IFunctionSource functionSource, TypeInfoProvider typeInfo, CLRSpecialIdentifiers clr, bool optimizeCopies)
 {
     TypeSystem = typeSystem;
     FunctionSource = functionSource;
     TypeInfo = typeInfo;
     CLR = clr;
     OptimizeCopies = optimizeCopies;
 }

 public EmulateStructAssignment(QualifiedMemberIdentifier member, IFunctionSource functionSource, TypeSystem typeSystem, TypeInfoProvider typeInfo, CLRSpecialIdentifiers clr, bool optimizeCopies)
     : base(member, functionSource)
 {
     TypeSystem = typeSystem;
     TypeInfo = typeInfo;
     CLR = clr;
     OptimizeCopies = optimizeCopies;
 }

 public DecomposeMutationOperators (
     TypeSystem typeSystem, TypeInfoProvider typeInfo, 
     IFunctionSource functionSource, bool decomposeAllMutations
 ) {
     TypeSystem = typeSystem;
     TypeInfo = typeInfo;
     FunctionSource = functionSource;
     DecomposeAllMutations = decomposeAllMutations;
 }

 protected ComparisonTest MakeTest (
     string filename, string[] stubbedAssemblies = null,
     TypeInfoProvider typeInfo = null,
     AssemblyCache assemblyCache = null
 ) {
     return new ComparisonTest(
         EvaluatorPool,
         Portability.NormalizeDirectorySeparators(filename), stubbedAssemblies,
         typeInfo, assemblyCache
     );
 }

        public void Dispose () {
            if (EvaluatorPool != null) {
                EvaluatorPool.Dispose();
                EvaluatorPool = null;
            }

            if (DefaultTypeInfoProvider != null) {
                DefaultTypeInfoProvider.Dispose();
                DefaultTypeInfoProvider = null;
            }
        }

        public IntroduceEnumCasts(TypeSystem typeSystem, TypeInfoProvider typeInfo)
        {
            TypeSystem = typeSystem;
            TypeInfo = typeInfo;

            LogicalOperators = new HashSet<JSOperator>() {
                JSOperator.LogicalAnd,
                JSOperator.LogicalOr,
                JSOperator.LogicalNot
            };
        }

        public ComparisonTest(string filename, Regex[] stubbedAssemblies = null, TypeInfoProvider typeInfo = null)
        {
            Filename = Path.Combine(TestSourceFolder, filename);

            var sourceCode = File.ReadAllText(Filename);
            Assembly = CSharpUtil.Compile(sourceCode, out TemporaryFiles);

            TestMethod = Assembly.GetType("Program").GetMethod("Main");

            StubbedAssemblies = stubbedAssemblies;
            TypeInfo = typeInfo;
        }

        public AssemblyTranslator(TypeInfoProvider typeInfoProvider = null)
        {
            // Important to avoid preserving the proxy list from previous translations in this process
            MemberIdentifier.ResetProxies();

            if (typeInfoProvider != null) {
                TypeInfoProvider = typeInfoProvider;
            } else {
                TypeInfoProvider = new JSIL.TypeInfoProvider();
                AddProxyAssembly(typeof(JSIL.Proxies.ObjectProxy).Assembly, false);
            }
        }

        public ComparisonTest(
            EvaluatorPool pool,
            IEnumerable<string> filenames, string outputPath, 
            string[] stubbedAssemblies = null, TypeInfoProvider typeInfo = null,
            AssemblyCache assemblyCache = null
        )
        {
            var started = DateTime.UtcNow.Ticks;
            OutputPath = outputPath;
            EvaluatorPool = pool;

            var extensions = (from f in filenames select Path.GetExtension(f).ToLower()).Distinct().ToArray();
            var absoluteFilenames = (from f in filenames select Path.Combine(TestSourceFolder, f));

            if (extensions.Length != 1)
                throw new InvalidOperationException("Mixture of different source languages provided.");

            var assemblyNamePrefix = Path.GetDirectoryName(outputPath).Split(new char[] { '\\', '/' }).Last();
            var assemblyName = Path.Combine(
                assemblyNamePrefix,
                Path.GetFileName(outputPath).Replace(".js", "")
            );

            switch (extensions[0]) {
                case ".cs":
                    Assembly = CompilerUtil.CompileCS(absoluteFilenames, assemblyName);
                    break;
                case ".vb":
                    Assembly = CompilerUtil.CompileVB(absoluteFilenames, assemblyName);
                    break;
                case ".exe":
                case ".dll":
                    var fns = absoluteFilenames.ToArray();
                    if (fns.Length > 1)
                        throw new InvalidOperationException("Multiple binary assemblies provided.");

                    Assembly = Assembly.LoadFile(fns[0]);
                    break;
                default:
                    throw new ArgumentException("Unsupported source file type for test");
            }

            if (typeInfo != null)
                typeInfo.ClearCaches();

            StubbedAssemblies = stubbedAssemblies;
            TypeInfo = typeInfo;
            AssemblyCache = assemblyCache;

            var ended = DateTime.UtcNow.Ticks;
            CompilationElapsed = TimeSpan.FromTicks(ended - started);
        }

        public IntroduceEnumCasts (TypeSystem typeSystem, JSSpecialIdentifiers js, TypeInfoProvider typeInfo, MethodTypeFactory methodTypes) {
            TypeSystem = typeSystem;
            TypeInfo = typeInfo;
            MethodTypes = methodTypes;
            JS = js;

            LogicalOperators = new HashSet<JSOperator>() {
                JSOperator.LogicalAnd,
                JSOperator.LogicalOr,
                JSOperator.LogicalNot
            };

            BitwiseOperators = new HashSet<JSOperator>() {
                JSOperator.BitwiseAnd,
                JSOperator.BitwiseOr,
                JSOperator.BitwiseXor
            };
        }

        static AssemblyTranslator CreateTranslator(
            Configuration configuration, AssemblyManifest manifest, AssemblyCache assemblyCache
        )
        {
            TypeInfoProvider typeInfoProvider = null;

            if (
                configuration.ReuseTypeInfoAcrossAssemblies.GetValueOrDefault(true) &&
                (CachedTypeInfoProvider != null)
            ) {
                if (CachedTypeInfoProviderConfiguration.Assemblies.Equals(configuration.Assemblies))
                    typeInfoProvider = CachedTypeInfoProvider;
            }

            var translator = new AssemblyTranslator(configuration, typeInfoProvider, manifest, assemblyCache);

            translator.Decompiling += MakeProgressHandler("Decompiling   ");
            translator.Optimizing += MakeProgressHandler ("Optimizing    ");
            translator.Writing += MakeProgressHandler    ("Generating JS ");

            translator.AssemblyLoaded += (fn) => {
                Console.Error.WriteLine("// Loaded {0}", ShortenPath(fn));
            };
            translator.CouldNotLoadSymbols += (fn, ex) => {
            };
            translator.CouldNotResolveAssembly += (fn, ex) => {
                Console.Error.WriteLine("// Could not load module {0}: {1}", fn, ex.Message);
            };
            translator.CouldNotDecompileMethod += (fn, ex) => {
                Console.Error.WriteLine("// Could not decompile method {0}: {1}", fn, ex.Message);
            };

            if (typeInfoProvider == null) {
                if (CachedTypeInfoProvider != null)
                    CachedTypeInfoProvider.Dispose();

                CachedTypeInfoProvider = translator.GetTypeInfoProvider();
                CachedTypeInfoProviderConfiguration = configuration;
            }

            return translator;
        }

        protected IEnumerable<TestCaseData> FilenameTestSource(string[] filenames, TypeInfoProvider typeInfo = null, AssemblyCache asmCache = null)
        {
            var testNames = filenames.OrderBy((s) => s).ToArray();

            for (int i = 0, l = testNames.Length; i < l; i++) {
                var testName = testNames[i];

                bool isIgnored = testName.StartsWith("ignored:", StringComparison.OrdinalIgnoreCase);
                var actualTestName = testName;

                if (isIgnored)
                    actualTestName = actualTestName.Substring(actualTestName.IndexOf(":") + 1);

                var item = (new TestCaseData(new object[] { new object[] { actualTestName, typeInfo, asmCache, null, i == (l - 1) } }))
                    .SetName(Path.GetFileName(actualTestName));

                if (isIgnored)
                    item.Ignore();

                yield return item;
            }
        }

        private CompileResult RunComparisonTest(
            string filename, string[] stubbedAssemblies = null, TypeInfoProvider typeInfo = null, Action<string, string> errorCheckPredicate = null,
            List<string> failureList = null, string commonFile = null, bool shouldRunJs = true, AssemblyCache asmCache = null,
            Func<Configuration> makeConfiguration = null, Action<Exception> onTranslationFailure = null,
            string compilerOptions = ""
        )
        {
            CompileResult result = null;
            Console.WriteLine("// {0} ... ", Path.GetFileName(filename));
            filename = Portability.NormalizeDirectorySeparators(filename);

            try {
                var testFilenames = new List<string>() { filename };
                if (commonFile != null)
                    testFilenames.Add(commonFile);

                using (var test = new ComparisonTest(
                    EvaluatorPool,
                    testFilenames,
                    Path.Combine(
                        ComparisonTest.TestSourceFolder,
                        ComparisonTest.MapSourceFileToTestFile(filename)
                    ),
                    stubbedAssemblies, typeInfo, asmCache,
                    compilerOptions: compilerOptions
                )) {
                    result = test.CompileResult;

                    if (shouldRunJs) {
                        test.Run(makeConfiguration: makeConfiguration, onTranslationFailure: onTranslationFailure);
                    } else {
                        string js;
                        long elapsed;
                        try {
                            var csOutput = test.RunCSharp(new string[0], out elapsed);
                            test.GenerateJavascript(new string[0], out js, out elapsed, makeConfiguration, onTranslationFailure);

                            Console.WriteLine("generated");

                            if (errorCheckPredicate != null) {
                                errorCheckPredicate(csOutput, js);
                            }
                        } catch (Exception) {
                            Console.WriteLine("error");
                            throw;
                        }
                    }
                }
            } catch (Exception ex) {
                if (ex.Message == "JS test failed")
                    Debug.WriteLine(ex.InnerException);
                else
                    Debug.WriteLine(ex);

                if (failureList != null) {
                    failureList.Add(Path.GetFileNameWithoutExtension(filename));
                } else
                    throw;
            }

            return result;
        }

        /// <summary>
        /// Runs one or more comparison tests by compiling the source C# or VB.net file,
        ///     running the compiled test method, translating the compiled test method to JS,
        ///     then running the translated JS and comparing the outputs.
        /// </summary>
        /// <param name="filenames">The path to one or more test files. If a test file is named 'Common.cs' it will be linked into all tests.</param>
        /// <param name="stubbedAssemblies">The paths of assemblies to stub during translation, if any.</param>
        /// <param name="typeInfo">A TypeInfoProvider to use for type info. Using this parameter is not advised if you use proxies or JSIL.Meta attributes in your tests.</param>
        /// <param name="testPredicate">A predicate to invoke before running each test. If the predicate returns false, the JS version of the test will not be run (though it will be translated).</param>
        protected void RunComparisonTests(
            string[] filenames, string[] stubbedAssemblies = null,
            TypeInfoProvider typeInfo = null,
            Func<string, bool> testPredicate = null,
            Action<string, string> errorCheckPredicate = null,
            Func<Configuration> getConfiguration = null
        )
        {
            var started = DateTime.UtcNow.Ticks;

            string commonFile = null;
            for (var i = 0; i < filenames.Length; i++) {
                if (filenames[i].Contains(Path.Combine ("", "Common."))) {
                    commonFile = filenames[i];
                    break;
                }
            }

            const string keyName = @"Software\Squared\JSIL\Tests\PreviousFailures";

            StackFrame callingTest = null;
            for (int i = 1; i < 10; i++) {
                callingTest = new StackFrame(i);
                var method = callingTest.GetMethod();
                if ((method != null) && method.GetCustomAttributes(true).Any(
                    (ca) => ca.GetType().FullName == "NUnit.Framework.TestAttribute"
                )) {
                    break;
                } else {
                    callingTest = null;
                }
            }

            var previousFailures = new HashSet<string>();
            MethodBase callingMethod = null;
            if ((callingTest != null) && ((callingMethod = callingTest.GetMethod()) != null)) {
                try {
                    using (var rk = Registry.CurrentUser.CreateSubKey(keyName)) {
                        var names = rk.GetValue(callingMethod.Name) as string;
                        if (names != null) {
                            foreach (var name in names.Split(',')) {
                                previousFailures.Add(name);
                            }
                        }
                    }
                } catch (Exception ex) {
                    Console.WriteLine("Warning: Could not open registry key: {0}", ex);
                }
            }

            var failureList = new List<string>();
            var sortedFilenames = new List<string>(filenames);
            sortedFilenames.Sort(
                (lhs, rhs) => {
                    var lhsShort = Path.GetFileNameWithoutExtension(lhs);
                    var rhsShort = Path.GetFileNameWithoutExtension(rhs);

                    int result =
                        (previousFailures.Contains(lhsShort) ? 0 : 1).CompareTo(
                            previousFailures.Contains(rhsShort) ? 0 : 1
                        );

                    if (result == 0)
                        result = lhsShort.CompareTo(rhsShort);

                    return result;
                }
            );

            var asmCache = new AssemblyCache();

            foreach (var filename in sortedFilenames) {
                if (filename == commonFile)
                    continue;

                bool shouldRunJs = true;
                if (testPredicate != null)
                    shouldRunJs = testPredicate(filename);

                RunComparisonTest(
                    filename, stubbedAssemblies, typeInfo,
                    errorCheckPredicate, failureList,
                    commonFile, shouldRunJs, asmCache,
                    getConfiguration ?? MakeConfiguration
                );
            }

            if (callingMethod != null) {
                try {
                    using (var rk = Registry.CurrentUser.CreateSubKey(keyName))
                        rk.SetValue(callingMethod.Name, String.Join(",", failureList.ToArray()));
//.........这里部分代码省略.........

        protected string GenericTest(
            string fileName, string csharpOutput,
            string javascriptOutput, string[] stubbedAssemblies = null,
            TypeInfoProvider typeInfo = null
        )
        {
            long elapsed, temp;
            string generatedJs = null;

            using (var test = new ComparisonTest(EvaluatorPool, Portability.NormalizeDirectorySeparators(fileName), stubbedAssemblies, typeInfo)) {
                var csOutput = test.RunCSharp(new string[0], out elapsed);

                try {
                    var jsOutput = test.RunJavascript(new string[0], out generatedJs, out temp, out elapsed, MakeConfiguration);

                    Assert.AreEqual(Portability.NormalizeNewLines(csharpOutput), csOutput.Trim(), "Did not get expected output from C# test");
                    Assert.AreEqual(Portability.NormalizeNewLines(javascriptOutput), jsOutput.Trim(), "Did not get expected output from JavaScript test");
                } catch {
                    Console.Error.WriteLine("// Generated JS: \r\n{0}", generatedJs);
                    throw;
                }
            }

            return generatedJs;
        }

        protected IEnumerable<TestCaseData> FolderTestSource(string folderName, TypeInfoProvider typeInfo = null, AssemblyCache asmCache = null)
        {
            var testPath = Path.GetFullPath(Path.Combine(ComparisonTest.TestSourceFolder, folderName));
            var testNames = Directory.GetFiles(testPath, "*.cs")
                .Concat(Directory.GetFiles(testPath, "*.vb"))
                .Concat(Directory.GetFiles(testPath, "*.fs"))
                .OrderBy((s) => s).ToArray();

            string commonFile = null;

            foreach (var testName in testNames) {
                if (Path.GetFileNameWithoutExtension(testName) == "Common") {
                    commonFile = testName;
                    break;
                }
            }

            for (int i = 0, l = testNames.Length; i < l; i++) {
                var testName = testNames[i];
                if (Path.GetFileNameWithoutExtension(testName) == "Common")
                    continue;

                yield return (new TestCaseData(new object[] { new object[] { testName, typeInfo, asmCache, commonFile, i == (l - 1) } }))
                    .SetName(PickTestNameForFilename(testName))
                    .SetDescription(String.Format("{0}\\{1}", folderName, Path.GetFileName(testName)))
                    .SetCategory(folderName);
            }
        }