Merge pull request #1527 from Microsoft/billti/fixUnitTestDebugging

Explicitly load the VS assemblies on Dev15 to fix unit test debugging

Author: billti

Nodejs/Product/TestAdapter/TestExecutor.cs

@@ -17,9 +17,11 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.Globalization;
 using System.IO;
 using System.Linq;
 using System.Net.NetworkInformation;
+using System.Reflection;
 using System.Runtime.InteropServices;
 using System.Text;
 using System.Threading;
@@ -30,9 +32,9 @@
 using Microsoft.VisualStudioTools;
 using Microsoft.VisualStudioTools.Project;
 using MSBuild = Microsoft.Build.Evaluation;
-using System.Globalization;
 
-namespace Microsoft.NodejsTools.TestAdapter {
+namespace Microsoft.NodejsTools.TestAdapter
+{
     [ExtensionUri(TestExecutor.ExecutorUriString)]
     class TestExecutor : ITestExecutor {
         public const string ExecutorUriString = "executor://NodejsTestExecutor/v1";
@@ -158,6 +160,26 @@ private void RunTestCase(VisualStudioApp app, IFrameworkHandle frameworkHandle,
                 return;
             }
 
+#if DEV15
+            // VS 2017 doesn't install some assemblies to the GAC that are needed to work with the
+            // debugger, and as the tests don't execute in the devenv.exe process, those assemblies
+            // fail to load - so load them manually from PublicAssemblies.
+
+            // Use the executable name, as this is only needed for the out of proc test execution
+            // that may interact with the debugger (vstest.executionengine.x86.exe).
+            string currentProc = Process.GetCurrentProcess().MainModule.FileName;
+            if(Path.GetFileName(currentProc).ToLowerInvariant().Equals("vstest.executionengine.x86.exe"))
+            {
+                string baseDir = Path.GetDirectoryName(currentProc);
+                string publicAssemblies = Path.Combine(baseDir, "..\\..\\..\\PublicAssemblies");
+
+                Assembly.LoadFrom(Path.Combine(publicAssemblies, "Microsoft.VisualStudio.OLE.Interop.dll"));
+                Assembly.LoadFrom(Path.Combine(publicAssemblies, "envdte90.dll"));
+                Assembly.LoadFrom(Path.Combine(publicAssemblies, "envdte80.dll"));
+                Assembly.LoadFrom(Path.Combine(publicAssemblies, "envdte.dll"));
+            }
+#endif
+
             NodejsTestInfo testInfo = new NodejsTestInfo(test.FullyQualifiedName);
             List<string> args = new List<string>();
             int port = 0;