Fix the coverage tox target

It was broken for a long while, since the migration
of the dashboard code into Horizon, and then back
into this repository, as .testr.conf was removed.

Use coverage directly instead of testrepository,
the same way as Horizon does. We should port
the normal test runner to the Django test runner too,
instead of the custom run_tests.sh script, but
that's for another (future) review.

Change-Id: I08966ddc7e891156a1c934bb115ce8a02f77ec83

.coveragerc

@@ -0,0 +1,13 @@
+[run]
+branch = True
+source = sahara_dashboard
+omit =
+ .tox/*
+ sahara_dashboard/test/*
+
+[paths]
+source = sahara_dashboard
+
+[report]
+ignore_errors = True
+precision = 3

lower-constraints.txt

@@ -112,7 +112,6 @@ six==1.10.0
 statsd==3.2.1
 stevedore==1.20.0
 tenacity==3.2.1
-testrepository==0.0.18
 testscenarios==0.4
 testtools==2.2.0
 traceback2==1.4.0

test-requirements.txt

@@ -12,7 +12,6 @@ netifaces>=0.10.4 # MIT
 nose-exclude>=0.5.0 # LGPL
 python-subunit>=1.0.0 # Apache-2.0/BSD
 selenium>=2.50.1 # Apache-2.0
-testrepository>=0.0.18 # Apache-2.0/BSD
 testscenarios>=0.4 # Apache-2.0/BSD
 testtools>=2.2.0 # MIT
 # This also needs xvfb library installed on your OS

tox.ini

@@ -54,7 +54,11 @@ commands = sphinx-build -a -E -W -d releasenotes/build/doctrees -b html releasen
 
 [testenv:cover]
 basepython = python3
-commands = python setup.py testr --coverage --testr-args='{posargs}'
+commands =
+  coverage erase
+  coverage run {toxinidir}/manage.py test sahara_dashboard --settings=sahara_dashboard.test.settings --exclude-dir=sahara_dashboard/test/integration_tests {posargs}
+  coverage html -d cover
+  coverage xml -o cover/coverage.xml
 
 [testenv:debug]
 basepython = python3