Merge branch 'test_coverage' into 'master'

Test coverage

See merge request !37

.gitlab-ci.yml

@@ -70,11 +70,12 @@ doc:
     - source ./ci/install_scripts.sh
     - python -m pip install pip --upgrade
     - python -m pip install setuptools --upgrade
+    - python -m pip install pytest-cov
     - install_silx
     - python -m pip install -r requirements.txt
     - python -m pip install .
   script:
-    - python -m unittest tomoscan.test.suite -v
+    - python -m pytest --cov=tomoscan .
 
 
 test:python3.7_stretch_pyqt5: