Merge pull request #2716 from stephentoub/disable_fsw_parallel

Disable parallelization of FSW tests

Author: stephentoub

src/System.IO.FileSystem.Watcher/tests/System.IO.FileSystem.Watcher.Tests.csproj

@@ -33,6 +33,7 @@
     <Compile Include="FileSystemEventArgs.unit.cs" />
     <Compile Include="FileSystemWatcher.unit.cs" />
     <Compile Include="RenamedEventArgs.unit.cs" />
+    <Compile Include="XunitAssemblyAttributes.cs" />
   </ItemGroup>
   <ItemGroup>
     <None Include="project.json" />

src/System.IO.FileSystem.Watcher/tests/XunitAssemblyAttributes.cs

@@ -0,0 +1,7 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+using Xunit;
+
+// Disable parallelization of FileSystemWatcher tests
+[assembly: CollectionBehavior(CollectionBehavior.CollectionPerAssembly, DisableTestParallelization = true, MaxParallelThreads = 1)]