Upgrade to NUnit 3.9 and enable parallel test execution.

ICSharpCode.Decompiler.Tests/CorrectnessTestRunner.cs

@@ -26,10 +26,10 @@ using NUnit.Framework;
 
 namespace ICSharpCode.Decompiler.Tests
 {
-	[TestFixture]
+	[TestFixture, Parallelizable(ParallelScope.All)]
 	public class CorrectnessTestRunner
 	{
-		const string TestCasePath = DecompilerTestBase.TestCasePath + "/Correctness";
+		static readonly string TestCasePath = DecompilerTestBase.TestCasePath + "/Correctness";
 
 		[Test]
 		public void AllFilesHaveTests()

ICSharpCode.Decompiler.Tests/DecompilerTestBase.cs

@@ -32,7 +32,9 @@ namespace ICSharpCode.Decompiler.Tests
 {
 	public abstract class DecompilerTestBase
 	{
-		public const string TestCasePath = "../../../TestCases";
+		public static readonly string TestCasePath = Path.Combine(
+			Path.GetDirectoryName(typeof(DecompilerTestBase).Assembly.Location),
+			"../../../TestCases");
 
 		protected static void ValidateFileRoundtrip(string samplesFileName)
 		{

ICSharpCode.Decompiler.Tests/Helpers/Tester.cs

@@ -219,7 +219,7 @@ namespace ICSharpCode.Decompiler.Tests.Helpers
 			} else if (flags.HasFlag(CompilerOptions.UseMcs)) {
 				CompilerResults results = new CompilerResults(new TempFileCollection());
 				results.PathToAssembly = outputFileName ?? Path.GetTempFileName();
-				string testBasePath = Path.GetFullPath("../../../../ILSpy-tests");
+				string testBasePath = RoundtripAssembly.TestDir;
 				if (!Directory.Exists(testBasePath)) {
 					Assert.Ignore($"Compilation with mcs ignored: test directory '{testBasePath}' needs to be checked out separately." + Environment.NewLine +
 			  $"git clone https://github.com/icsharpcode/ILSpy-tests \"{testBasePath}\"");

ICSharpCode.Decompiler.Tests/ICSharpCode.Decompiler.Tests.csproj

@@ -38,9 +38,9 @@
   <ItemGroup>
     <PackageReference Include="DiffLib" Version="1.0.0.55" />
     <PackageReference Include="Microsoft.CodeAnalysis.CSharp" Version="2.6.0" />
+    <PackageReference Include="NUnit3TestAdapter" Version="3.9.0" />
     <PackageReference Include="System.Collections.Immutable" Version="1.3.1" />
-    <PackageReference Include="NUnit" Version="2.6.3" />
-    <PackageReference Include="NUnitTestAdapter" Version="2.0.0" />
+    <PackageReference Include="NUnit" Version="3.9.0" />
   </ItemGroup>
 
   <ItemGroup>

ICSharpCode.Decompiler.Tests/ILPrettyTestRunner.cs

@@ -1,18 +1,34 @@
-using System;
-using System.Collections.Generic;
+// 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.IO;
 using System.Linq;
 using System.Runtime.CompilerServices;
-using System.Text;
-using System.Threading.Tasks;
 using ICSharpCode.Decompiler.Tests.Helpers;
 using NUnit.Framework;
 
 namespace ICSharpCode.Decompiler.Tests
 {
+	[TestFixture, Parallelizable(ParallelScope.All)]
 	public class ILPrettyTestRunner
 	{
-		const string TestCasePath = DecompilerTestBase.TestCasePath + "/ILPretty";
+		static readonly string TestCasePath = DecompilerTestBase.TestCasePath + "/ILPretty";
 
 		[Test]
 		public void AllFilesHaveTests()
@@ -78,13 +94,13 @@ namespace ICSharpCode.Decompiler.Tests
 			Run(settings: new DecompilerSettings { RemoveDeadCode = true });
 		}
 
-		[Test, Ignore]
+		[Test, Ignore("?")]
 		public void FSharpLoops_Debug()
 		{
 			Run(settings: new DecompilerSettings { RemoveDeadCode = true });
 		}
 
-		[Test, Ignore]
+		[Test, Ignore("?")]
 		public void FSharpLoops_Release()
 		{
 			Run(settings: new DecompilerSettings { RemoveDeadCode = true });

ICSharpCode.Decompiler.Tests/PrettyTestRunner.cs

@@ -26,9 +26,10 @@ using NUnit.Framework;
 
 namespace ICSharpCode.Decompiler.Tests
 {
+	[TestFixture, Parallelizable(ParallelScope.All)]
 	public class PrettyTestRunner
 	{
-		const string TestCasePath = DecompilerTestBase.TestCasePath + "/Pretty";
+		static readonly string TestCasePath = DecompilerTestBase.TestCasePath + "/Pretty";
 
 		[Test]
 		public void AllFilesHaveTests()

ICSharpCode.Decompiler.Tests/RoundtripAssembly.cs

@@ -30,10 +30,11 @@ using NUnit.Framework;
 
 namespace ICSharpCode.Decompiler.Tests
 {
+	[TestFixture, Parallelizable(ParallelScope.All)]
 	public class RoundtripAssembly
 	{
-		static readonly string testDir = Path.GetFullPath("../../../../ILSpy-tests");
-		static readonly string nunit = Path.Combine(testDir, "nunit", "nunit3-console.exe");
+		public static readonly string TestDir = Path.GetFullPath(Path.Combine(DecompilerTestBase.TestCasePath, "../../ILSpy-tests"));
+		static readonly string nunit = Path.Combine(TestDir, "nunit", "nunit3-console.exe");
 		
 		[Test]
 		public void Cecil_net45()
@@ -105,26 +106,30 @@ namespace ICSharpCode.Decompiler.Tests
 
 		void RunWithTest(string dir, string fileToRoundtrip, string fileToTest)
 		{
-			RunInternal(dir, fileToRoundtrip, () => RunTest(Path.Combine(testDir, dir) + "-output", fileToTest));
+			RunInternal(dir, fileToRoundtrip, outputDir => RunTest(outputDir, fileToTest));
 		}
 		
 		void RunWithOutput(string dir, string fileToRoundtrip)
 		{
-			string inputDir = Path.Combine(testDir, dir);
-			string outputDir = inputDir + "-output";
-			RunInternal(dir, fileToRoundtrip, () => Tester.RunAndCompareOutput(fileToRoundtrip, Path.Combine(inputDir, fileToRoundtrip), Path.Combine(outputDir, fileToRoundtrip)));
+			string inputDir = Path.Combine(TestDir, dir);
+			RunInternal(dir, fileToRoundtrip,
+				outputDir => Tester.RunAndCompareOutput(fileToRoundtrip, Path.Combine(inputDir, fileToRoundtrip), Path.Combine(outputDir, fileToRoundtrip)));
 		}
 		
-		void RunInternal(string dir, string fileToRoundtrip, Action testAction)
+		void RunInternal(string dir, string fileToRoundtrip, Action<string> testAction)
 		{
-			if (!Directory.Exists(testDir)) {
-				Assert.Ignore($"Assembly-roundtrip test ignored: test directory '{testDir}' needs to be checked out separately." + Environment.NewLine +
-				              $"git clone https://github.com/icsharpcode/ILSpy-tests \"{testDir}\"");
+			if (!Directory.Exists(TestDir)) {
+				Assert.Ignore($"Assembly-roundtrip test ignored: test directory '{TestDir}' needs to be checked out separately." + Environment.NewLine +
+				              $"git clone https://github.com/icsharpcode/ILSpy-tests \"{TestDir}\"");
 			}
-			string inputDir = Path.Combine(testDir, dir);
-			//RunTest(inputDir, fileToTest);
+			string inputDir = Path.Combine(TestDir, dir);
 			string decompiledDir = inputDir + "-decompiled";
 			string outputDir = inputDir + "-output";
+			if (inputDir.EndsWith("TestCases")) {
+				// make sure output dir names are unique so that we don't get trouble due to parallel test execution
+				decompiledDir += Path.GetFileNameWithoutExtension(fileToRoundtrip);
+				outputDir += Path.GetFileNameWithoutExtension(fileToRoundtrip);
+			}
 			ClearDirectory(decompiledDir);
 			ClearDirectory(outputDir);
 			string projectFile = null;
@@ -157,7 +162,7 @@ namespace ICSharpCode.Decompiler.Tests
 			Assert.IsNotNull(projectFile, $"Could not find {fileToRoundtrip}");
 			
 			Compile(projectFile, outputDir);
-			testAction();
+			testAction(outputDir);
 		}
 
 		static void ClearDirectory(string dir)

ICSharpCode.Decompiler.Tests/TestTraceListener.cs

@@ -17,7 +17,6 @@
 // DEALINGS IN THE SOFTWARE.
 
 using System.Diagnostics;
-using NUnit.Core;
 using NUnit.Framework;
 
 namespace ICSharpCode.Decompiler.Tests
@@ -25,14 +24,13 @@ namespace ICSharpCode.Decompiler.Tests
 	[SetUpFixture]
 	public class TestTraceListener : DefaultTraceListener
 	{
-		[SetUp]
+		[OneTimeSetUp]
 		public void RunBeforeAnyTests()
 		{
 			Debug.Listeners.Insert(0, this);
 		}
 		
-		
-		[TearDown]
+		[OneTimeTearDown]
 		public void RunAfterAnyTests()
 		{
 			Debug.Listeners.Remove(this);

ICSharpCode.Decompiler.Tests/UglyTestRunner.cs

@@ -26,9 +26,10 @@ using NUnit.Framework;
 
 namespace ICSharpCode.Decompiler.Tests
 {
+	[TestFixture, Parallelizable(ParallelScope.All)]
 	public class UglyTestRunner
 	{
-		const string TestCasePath = DecompilerTestBase.TestCasePath + "/Ugly";
+		static readonly string TestCasePath = DecompilerTestBase.TestCasePath + "/Ugly";
 
 		[Test]
 		public void AllFilesHaveTests()

ILSpy.BamlDecompiler.Tests/BamlTestRunner.cs

@@ -14,7 +14,7 @@ using NUnit.Framework;
 
 namespace ILSpy.BamlDecompiler.Tests
 {
-	[TestFixture]
+	[TestFixture, Parallelizable(ParallelScope.All)]
 	public class BamlTestRunner
 	{
 		[Test]
@@ -104,12 +104,17 @@ namespace ILSpy.BamlDecompiler.Tests
 		#region RunTest
 		void RunTest(string name)
 		{
-			RunTest(name, typeof(BamlTestRunner).Assembly.Location, Path.Combine("..\\..\\..\\..\\ILSpy.BamlDecompiler.Tests", name + ".xaml"));
+			RunTest(name, typeof(BamlTestRunner).Assembly.Location,
+				Path.Combine(
+					Path.GetDirectoryName(typeof(BamlTestRunner).Assembly.Location),
+					"../../../../ILSpy.BamlDecompiler.Tests", name + ".xaml"));
 		}
 
 		void RunTest(string name, string asmPath, string sourcePath)
 		{
 			var resolver = new DefaultAssemblyResolver();
+			resolver.RemoveSearchDirectory(".");
+			resolver.AddSearchDirectory(Path.GetDirectoryName(asmPath));
 			var assembly = AssemblyDefinition.ReadAssembly(asmPath, new ReaderParameters { AssemblyResolver = resolver, InMemory = true });
 			Resource res = assembly.MainModule.Resources.First();
 			Stream bamlStream = LoadBaml(res, name + ".baml");

ILSpy.BamlDecompiler.Tests/ILSpy.BamlDecompiler.Tests.csproj

@@ -33,7 +33,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="NUnit" Version="2.6.3" />
+    <PackageReference Include="NUnit" Version="3.9.0" />
   </ItemGroup>
 
   <ItemGroup>