Test: DataContractSerializerTests/DCS_FileStreamSurrogate failed with "System.UnauthorizedAccessException"

Opened on behalf of @JiayiLi1

The test DataContractSerializerTests/DCS_FileStreamSurrogate has failed.

System.UnauthorizedAccessException : Access to the path 'C:\dotnetbuild\work\8b64ac9d-8324-443b-a250-64baec62f74f\Work\142c785d-2f76-4aae-b3c8-32bf55151a7a\Unzip\Test.txt' is denied.

    Stack Trace:

       at System.IO.FileStream.OpenHandle(FileMode mode, FileShare share, FileOptions options)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options)
   at System.IO.FileStream..ctor(String path, FileMode mode, FileAccess access, FileShare share)
   at MyFileStream..ctor(String fileName)
   at DataContractSerializerTests.DCS_FileStreamSurrogate()

Build : Master - 20170428.01 (UWP F5 Tests)
Failing configurations:

• Windows.10.Amd64
  • x64-Debug
  • x64-Release

Detail: https://mc.dot.net/#/product/netcore/master/source/official~2Fcorefx~2Fmaster~2F/type/test~2Ffunctional~2Fuwp~2F/build/20170428.01/workItem/System.Runtime.Serialization.Xml.ReflectionOnly.Tests/analysis/xunit/DataContractSerializerTests~2FDCS_FileStreamSurrogate

[danmoseley]

Test is writing to its own directory. Should write to temp eg with the TempFile or TempDirectory clases.

[shmao]

This is a test bug. We should fix the test according to @danmosemsft 's suggestion.

[danmoseley]

Note this is 2.1 not 2.0 as it's UWP

[ptoonen]

I'll start work on this one.

[karelz]

@ptoonen thanks for your contribution!
I sent you collaborator invite, so that we can assign it to you. Ping me here please when you accept it. Thanks!

[karelz]

Also I am not sure if we have good/any guidance on running UWP tests at this moment. If you hit any road blocks, please let us know - we may need to clean up our own guidance first ...

[ptoonen]

@karelz you should be able to assign now :)

[karelz]

Done, thanks!