Merge "Added tox environment for gathering coverage"

.coveragerc

@@ -1,6 +0,0 @@
-[report]
-# Regexes for lines to exclude from consideration
-exclude_lines =
-    if __name__ == .__main__.:
-include=
-    hooks/rabbit*

.zuul.yaml

@@ -1,3 +1,4 @@
 - project:
     templates:
       - python35-charm-jobs
+      - openstack-cover-jobs

tox.ini

@@ -39,6 +39,34 @@ deps = -r{toxinidir}/requirements.txt
 commands = flake8 {posargs} hooks unit_tests tests actions lib scripts
            charm-proof
 
+[testenv:cover]
+# Technique based heavily upon
+# https://github.com/openstack/nova/blob/master/tox.ini
+basepython = python3
+deps = -r{toxinidir}/requirements.txt
+       -r{toxinidir}/test-requirements.txt
+setenv =
+    {[testenv]setenv}
+    PYTHON=coverage run
+commands =
+    coverage erase
+    ostestr {posargs}
+    coverage combine
+    coverage html -d cover
+    coverage xml -o cover/coverage.xml
+    coverage report
+
+[coverage:run]
+branch = True
+concurrency = multiprocessing
+parallel = True
+source =
+    .
+omit =
+    .tox/*
+    */charmhelpers/*
+    unit_tests/*
+
 [testenv:venv]
 basepython = python3
 commands = {posargs}