record test results on appveyor

Author: mr-c

appveyor.yml

@@ -48,7 +48,10 @@ build_script:
 
 
 test_script:
-  - "%PYTHON%\\python.exe -m pytest --verbose -p no:cacheprovider"
+  - "%PYTHON%\\python.exe -m pytest --verbose -p no:cacheprovider --addopts --junit-xml=tests.xml"
+  - ps: >-
+      $wc = New-Object 'System.Net.WebClient'
+      $wc.UploadFile("https://ci.appveyor.com/api/testresults/xunit/$($env:APPVEYOR_JOB_ID)", (Resolve-Path .\tests.xml))
 
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