#146, run the tests on Appveyor

.appveyor.yml

@@ -30,4 +30,5 @@ install:
 
 build_script:
     - cd C:\msys64\home\ghc\shake-build
+    - echo "" | stack --no-terminal exec -- build.bat selftest
     - echo "" | stack --no-terminal exec -- build.bat -j --no-progress inplace/bin/ghc-stage1.exe