added windows and osx tests

.travis.yml

@@ -8,19 +8,38 @@ matrix:
     - python: 3.7
       dist: xenial
       sudo: true
+    - name: "Python 3.7.2 on macOS"
+      os: osx
+      osx_image: xcode10.2  # Python 3.7.2 running on macOS 10.14.3
+      language: shell       # 'language: python' is an error on Travis CI macOS
+    # - os: osx
+    #   language: minimal
+    #   install: pip3 install -e .[tests]
+    - name: "Python 3.7.3 on Windows"
+      os: windows           # Windows 10.0.17134 N/A Build 17134
+      language: shell       # 'language: python' is an error on Travis CI Windows
+      before_install:
+        - choco install python
+        - python -m pip install --upgrade pip
+        - pip3 install --upgrade pytest
+        - pip3 install codecov
+      env: PATH=/c/Python37:/c/Python37/Scripts:$PATH
+      script: 
+        - python -m pytest
+        - python -m codecov
 before_install:
   # coverage submission packages
-  - pip install -U pip
-  - pip install -U pytest
-  - pip install codecov
-  - pip install pymongo
+  - pip3 install -U pip
+  - pip3 install -U pytest
+  - pip3 install codecov
+  - pip3 install pymongo
 install:
   - if [ "$TRAVIS_PYTHON_VERSION" == "2.7" ]; then pip install coverage pytest-cov .; else pip install ".[test]"; fi
-script: python -m pytest --cov=cachier
+script: python3 -m pytest
 # submit coverage
 after_success:
   # - coveralls
-  - codecov
+  - python3 -m codecov
 # deploy:
 #   provider: pypi
 #   user: shaypal5

tox.ini

@@ -29,4 +29,6 @@ norecursedirs=dist build .tox
 addopts =
     # --doctest-modules
     --cov=cachier
+    -r a
+    -v