Report coverage (#863)

.travis.yml

@@ -5,7 +5,11 @@ env:
   matrix:
     - ENV=test
     - ENV=check
-    - ENV=test_nvim
+    - ENV=test_coverage
+matrix:
+  include:
+    - env: ENV=test_coverage
+      python: 2.7
 install:
   - |
     if [ "$ENV" = "test" ]; then
@@ -13,12 +17,16 @@ install:
     fi
   - |
     # https://github.com/neovim/bot-ci#generated-builds
-    if [ "$ENV" = "test_nvim" ]; then
+    if [ "$ENV" = "test_coverage" ]; then
       eval "$(curl -Ss https://raw.githubusercontent.com/neovim/bot-ci/master/scripts/travis-setup.sh) nightly-x64"
       pip --version
-      pip install neovim
+      pip install neovim pytest-cov
     else
       vim --version
     fi
 script:
   - make --keep-going "$ENV"
+
+after_success:
+  - coverage xml
+  - bash <(curl -s https://codecov.io/bash) -X gcov -X coveragepy -X fix -X search -X xcode -f coverage.xml -F py${TRAVIS_PYTHON_VERSION//./}