run tests in GH actions

Author: agramfort

.github/workflows/pythonpackage.yml

@@ -29,10 +29,18 @@ jobs:
       run: |
         python -m pip install --upgrade pip
         pip install -r requirements.txt
+        pip install flake8 pytest "pytest-cov<2.6" codecov
+        pip install -U "sklearn"
     - name: Lint with flake8
       run: |
-        pip install flake8
         # stop the build if there are Python syntax errors or undefined names
         flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
         flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics        
+    - name: Run tests
+      run: |
+        pip install .
+        python -m pytest -v test/ ot/ --doctest-modules --ignore ot/gpu/ --cov=ot
+    - name: Upload codecov
+      run: |
+        codecov