DEV: Add Code Coverage Report Generation + Upload

* Add code coverage XML report generation via pytest-cov by adding test runner options in tox.ini file.
* Create .coveragerc file for pytest-cov using codecov defaults.
* Add report upload to codecov and deepsource services by adding after-sucess section to .travis.yml file.

Author: tialab

.coveragerc

@@ -0,0 +1,15 @@
+# Pytest-cov configuration: https://coverage.readthedocs.io/en/latest/config.html
+# Based off of covdecov example: https://gist.github.com/codecov-io/bf15bde2c7db1a011b6e
+[run]
+branch = True
+source = tiatoolbox
+
+[report]
+exclude_lines =
+    if self.debug:
+    pragma: no cover
+    raise NotImplementedError
+    if __name__ == .__main__.:
+ignore_errors = True
+omit =
+    tests/*

.travis.yml

@@ -13,6 +13,16 @@ install: pip install -U tox-travis
 # Command to run tests, e.g. python setup.py test
 script: tox
 
+# Upload test coverage reports (codecov and deepsource)
+after_success:
+# Upload coverage to codecov
+- bash <(curl -s https://codecov.io/bash)
+# Install deepsource CLI
+- curl https://deepsource.io/cli | sh
+- export DEEPSOURCE_DSN=https://sampledsn@deepsource.io
+# Report coverage artifact to 'test-coverage' analyzer
+-./bin/deepsource report --analyzer test-coverage --key python --value-file ./coverage.xml
+
 # Assuming you have installed the travis-ci CLI tool, after you
 # create the Github repo and add it to Travis, run the
 # following command to finish PyPI deployment setup:

requirements_dev.txt

@@ -4,9 +4,10 @@ wheel==0.33.6
 watchdog==0.9.0
 flake8==3.7.8
 tox==3.14.0
-coverage==4.5.4
+coverage==5.1
 Sphinx==1.8.5
 twine==1.14.0
 Click==7.0
 pytest==4.6.5
-pytest-runner==5.1
+pytest-runner==5.1
+pytest-cov==2.9.0

tox.ini

@@ -23,5 +23,4 @@ deps =
 ;     -r{toxinidir}/requirements.txt
 commands =
     pip install -U pip
-    pytest --basetemp={envtmpdir}
-
+    pytest --basetemp={envtmpdir} --cov=tiatoolbox --cov-report=term --cov-report=xml