[tests] Rewrite ValidateAppBundleTaskTests to not create a task in-process. (#9983)

This is a step towards making Xamarin.MacDev.Tests run tests out-of-process.

It requires adding '_GenerateBundleName' as a dependency for the
'_ValidateAppBundle' target, because we're invoking the '_ValidateAppBundle'
directly, and we can't depend on any other targets executing
'_GenerateBundleName', because there are no other executed targets.

msbuild/Xamarin.iOS.Tasks.Core/Xamarin.iOS.Common.targets

@@ -1062,7 +1062,7 @@ Copyright (C) 2013-2016 Xamarin. All rights reserved.
 			$(_AppBundlePath)..\%(_ResolvedAppExtensionReferences.FileName)%(_ResolvedAppExtensionReferences.Extension).dSYM" />
 	</Target>
 
-	<Target Name="_ValidateAppBundle" Condition="'$(IsAppExtension)' == 'false' And '$(IsWatchApp)' == 'false'" DependsOnTargets="_DetectSdkLocations;_ComputeTargetFrameworkMoniker">
+	<Target Name="_ValidateAppBundle" Condition="'$(IsAppExtension)' == 'false' And '$(IsWatchApp)' == 'false'" DependsOnTargets="_DetectSdkLocations;_ComputeTargetFrameworkMoniker;_GenerateBundleName">
 		<ValidateAppBundleTask
 			Condition="'$(IsMacEnabled)' == 'true'"
 			SessionId="$(BuildSessionId)"

tests/msbuild/Xamarin.MacDev.Tests/ProjectsTests/Extensions/ExtensionTestBase.cs

@@ -3,6 +3,8 @@ using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
 
+using Microsoft.Build.Evaluation;
+
 namespace Xamarin.iOS.Tasks
 {
 	public class ExtensionTestBase : TestBase {
@@ -15,7 +17,7 @@ namespace Xamarin.iOS.Tasks
 			Platform = platform;
 		}
 
-		public void BuildExtension (string hostAppName, string extensionName, string platform, string config, int expectedErrorCount = 0, System.Action<ProjectPaths> additionalAsserts = null)
+		public Project BuildExtension (string hostAppName, string extensionName, string platform, string config, int expectedErrorCount = 0, System.Action<ProjectPaths> additionalAsserts = null)
 		{
 			var bundlePath = platform;
 			var mtouchPaths = SetupProjectPaths (hostAppName, "../", true, bundlePath, config);
@@ -34,7 +36,7 @@ namespace Xamarin.iOS.Tasks
 			RunTarget (proj, "Build", expectedErrorCount);
 
 			if (expectedErrorCount > 0)
-				return;
+				return proj;
 
 			Assert.IsTrue (Directory.Exists (AppBundlePath), "{1} App Bundle does not exist: {0} ", AppBundlePath, bundlePath);
 
@@ -65,6 +67,8 @@ namespace Xamarin.iOS.Tasks
 
 			if (additionalAsserts != null)
 				additionalAsserts (mtouchPaths);
+
+			return proj;
 		}
 
 		public void SetupPaths (string appName, string platform) 

tests/msbuild/Xamarin.MacDev.Tests/TargetTests/ValidateAppBundleTaskTests.cs

@@ -1,5 +1,9 @@
+using System;
 using System.IO;
 using NUnit.Framework;
+
+using Microsoft.Build.Evaluation;
+
 using Xamarin.MacDev;
 
 namespace Xamarin.iOS.Tasks
@@ -7,70 +11,80 @@ namespace Xamarin.iOS.Tasks
 	[TestFixture]
 	public class ValidateAppBundleTaskTests : ExtensionTestBase
 	{
-		ValidateAppBundleTask task;
-
 		string extensionBundlePath;
-
 		string mainAppPlistPath;
 		string extensionPlistPath;
 
-		PDictionary sourcePlist;
+		Project project;
 
-		public override void Setup ()
+		public ValidateAppBundleTaskTests ()
+			: base ("iPhoneSimulator")
 		{
-			base.Setup ();
-
-			var extensionName = "MyActionExtension";
-			BuildExtension ("MyTabbedApplication", extensionName, "iPhoneSimulator", "Debug");
-
-			task = CreateTask<ValidateAppBundleTask> ();
-			task.AppBundlePath = AppBundlePath;
-			task.SdkIsSimulator = true;
-			task.TargetFrameworkMoniker = "Xamarin.iOS,v1.0";
-
-			extensionBundlePath = Path.Combine (AppBundlePath, "PlugIns", extensionName + ".appex");
+		}
 
+		[Test]
+		public void MissingFiles ()
+		{
+			project = BuildExtension ("MyTabbedApplication", "MyActionExtension", Platform, "Debug");
+			extensionBundlePath = AppBundlePath;
 			mainAppPlistPath = Path.Combine (AppBundlePath, "Info.plist");
 			extensionPlistPath = Path.Combine (extensionBundlePath, "Info.plist");
 
-			sourcePlist = PDictionary.FromFile (mainAppPlistPath);
+			MissingPlist_Extension ();
+			MissingPlist_MainApp ();
+			NotMatching_VersionBuildNumbers ();
 		}
 
-		[Test]
-		public void MissingPlist_MainApp ()
+		void MissingPlist_MainApp ()
 		{
-			File.Delete (mainAppPlistPath);
-			Assert.IsFalse (task.Execute (), "#1");
-			Assert.IsTrue (Engine.Logger.ErrorEvents.Count > 0, "#2");
+			var contents = File.ReadAllBytes (mainAppPlistPath);
+			try {
+				File.Delete (mainAppPlistPath);
+				Engine.Logger.Clear ();
+				RunTarget (project, "_ValidateAppBundle", 1);
+				Assert.IsTrue (Engine.Logger.ErrorEvents.Count > 0, "#2");
+			} finally {
+				// Restore the contents
+				File.WriteAllBytes (mainAppPlistPath, contents);
+			}
 		}
 
-		[Test]
-		public void MissingPlist_Extension ()
+		void MissingPlist_Extension ()
 		{
-			File.Delete (extensionPlistPath);
-			Assert.IsFalse (task.Execute (), "#1");
-			Assert.IsTrue (Engine.Logger.ErrorEvents.Count > 0, "#2");
+			var contents = File.ReadAllBytes (extensionPlistPath);
+			try { 
+				File.Delete (extensionPlistPath);
+				Engine.Logger.Clear ();
+				RunTarget (project, "_ValidateAppBundle", 1);
+				Assert.IsTrue (Engine.Logger.ErrorEvents.Count > 0, "#2");
+			} finally {
+				// Restore the contents
+				File.WriteAllBytes (extensionPlistPath, contents);
+			}
 		}
 
-		[Test (Description = "Xambug #38673")]
-		public void NotMatching_VersionBuildNumbers ()
+		// Xambug #38673
+		void NotMatching_VersionBuildNumbers ()
 		{
-			var warningCount = Engine.Logger.WarningsEvents.Count;
+			var contents = File.ReadAllBytes (mainAppPlistPath);
+			var sourcePlist = PDictionary.FromFile (mainAppPlistPath);
+			try {
+				// Warning: The App Extension has a CFBundleShortVersionString
+				// that does not match the main app bundle's CFBundleShortVersionString.
+				sourcePlist.SetCFBundleShortVersionString ("1");
 
-			// Warning: The App Extension has a CFBundleShortVersionString
-			// that does not match the main app bundle's CFBundleShortVersionString.
-			sourcePlist.SetCFBundleShortVersionString ("1");
-			warningCount++;
+				// Warning: The App Extension has a CFBundleVersion
+				// that does not match the main app bundle's CFBundleVersion.
+				sourcePlist.SetCFBundleVersion ("1");
 
-			// Warning: The App Extension has a CFBundleVersion
-			// that does not match the main app bundle's CFBundleVersion.
-			sourcePlist.SetCFBundleVersion ("1");
-			warningCount++;
-
-			sourcePlist.Save (mainAppPlistPath);
-			Assert.True (task.Execute (), "#1"); // No build error.
-			Assert.AreEqual (warningCount, Engine.Logger.WarningsEvents.Count, "#2");
+				sourcePlist.Save (mainAppPlistPath);
+				Engine.Logger.Clear ();
+				RunTarget (project, "_ValidateAppBundle", 0);
+				Assert.AreEqual (2, Engine.Logger.WarningsEvents.Count, "#2");
+			} finally {
+				// Restore the contents
+				File.WriteAllBytes (mainAppPlistPath, contents);
+			}
 		}
 	}
 }
-

tests/msbuild/Xamarin.MacDev.Tests/TestHelpers/TestBase.cs

@@ -317,13 +317,6 @@ namespace Xamarin.iOS.Tasks
 		{
 		}
 
-		public T CreateTask<T> () where T : Task, new()
-		{
-			var t = new T ();
-			t.BuildEngine = Engine;
-			return t;
-		}
-
 		/// <summary>
 		/// Executes the task and log its error messages.</summary>
 		/// <remarks>