Merge pull request #3164 from grayjay/cabal-install-unit-tests

Run cabal-install unit tests on AppVeyor

appveyor.yml

@@ -21,4 +21,4 @@ build_script:
   - echo "" | cabal install --only-dependencies --enable-tests --force-reinstalls
   - Setup configure --user --ghc-option=-Werror --enable-tests
   - Setup build
-  # - Setup test unit-tests --show-details=streaming
+  - Setup test unit-tests --show-details=streaming --test-option=--pattern=!FileMonitor