Merge pull request #571 from tahoe-lafs/3000.windows-coverage

Report code coverage from Windows CI

Fixes: ticket:3000

.appveyor.yml

@@ -48,9 +48,9 @@ test_script:
   # Put your test command here.
   # Note that you must use the environment variable %PYTHON% to refer to
   # the interpreter you're using - Appveyor does not do anything special
-  # to put the Python evrsion you want to use on PATH.
+  # to put the Python version you want to use on PATH.
   - |
-    %PYTHON%\Scripts\tox.exe -e py
+    %PYTHON%\Scripts\tox.exe -e coverage
 
 after_test:
   # This builds the main tahoe wheel, and wheels for all dependencies.
@@ -63,6 +63,10 @@ after_test:
     rd /s /q _trial_temp
     %PYTHON%\python.exe setup.py bdist_wheel
     %PYTHON%\python.exe -m pip wheel -w dist .
+  - |
+    %PYTHON%\python.exe -m pip install codecov coverage
+    %PYTHON%\python.exe -m coverage xml -o coverage.xml -i
+    %PYTHON%\python.exe -m codecov -X search -X gcov -f coverage.xml
 
 artifacts:
   # bdist_wheel puts your built wheel in the dist directory