Better support for parallel execution via vstest.console.exe:

- Non-lock source file copy
- Don't overwrite dependencies to avoid file locking errors when test assemblies are in the same folder and parallel execution is used.

Bump to Beta 2

Source/Machine.VSTestAdapter.VSIX/License.txt

@@ -1,4 +1,5 @@
 Copyright (c) 2012, 2013, 2014, 2015 Jonathan Wilkins
+Copyright (c) 2016 Ivan Zlatev
 
 This license governs use of the accompanying software. If you use the software, you
 accept this license. If you do not accept the license, do not use the software.

Source/Machine.VSTestAdapter/Helpers/IsolatedAppDomainExecutionScope.cs

@@ -52,12 +52,27 @@ private static AppDomain CreateAppDomain(string assemblyPath, string appName)
 
         private static void CopyRequiredRuntimeDependencies(IEnumerable<Assembly> assemblies, string destination)
         {
-            foreach (Assembly assembly in assemblies)
-            {
+            foreach (Assembly assembly in assemblies) {
                 string assemblyLocation = assembly.Location;
                 string assemblyName = Path.GetFileName(assemblyLocation);
                 string assemblyFileDestination = Path.Combine(destination, assemblyName);
-                File.Copy(assemblyLocation, assemblyFileDestination, true);
+                if (!File.Exists(assemblyFileDestination))
+                    CopyWithoutLockingSourceFile(assemblyLocation, assemblyFileDestination);
+            }
+        }
+
+        private static void CopyWithoutLockingSourceFile(string sourceFile, string destinationFile)
+        {
+            const int BUFFER_SIZE = 10 * 1024;
+
+            using (FileStream inputFile = new FileStream(sourceFile, FileMode.Open, FileAccess.Read, FileShare.Read, BUFFER_SIZE))
+            using (FileStream outputFile = new FileStream(destinationFile, FileMode.Create, FileAccess.ReadWrite, FileShare.None, BUFFER_SIZE)) {
+                byte[] buffer = new byte[BUFFER_SIZE];
+                int bytes;
+
+                while ((bytes = inputFile.Read(buffer, 0, buffer.Length)) > 0) {
+                    outputFile.Write(buffer, 0, bytes);
+                }
             }
         }
 

appveyor.yml

@@ -1,5 +1,5 @@
 environment:
-  nuget_version: '2.0.0-beta1'
+  nuget_version: '2.0.0-beta2'
   vsix_version: '2.0.0'
   assembly_version: '2.0.0'