Add coverage report

Change-Id: Ia520e5f0e96612fe9d0223a2fba1f49bcaa5070f

setup-test-env.sh

@@ -51,4 +51,5 @@ fi
 
 memcached &
 
-python setup.py testr --slowest
+# Yield execution to venv command
+$*

test-requirements.txt

@@ -8,3 +8,4 @@ testrepository>=0.0.17
 testtools>=0.9.32
 testscenarios>=0.4
 zake>=0.0.9
+coverage>=3.6

tox.ini

@@ -9,14 +9,17 @@ deps = -r{toxinidir}/requirements.txt
 install_command = pip install -U {opts} {packages}
 usedevelop = True
 commands =
-   bash -x {toxinidir}/run_tests.sh {posargs}
-
+   bash -x {toxinidir}/setup-test-env.sh python setup.py testr --slowest --testr-args="{posargs}"
 
 [testenv:venv]
 deps = -r{toxinidir}/requirements.txt
        -r{toxinidir}/test-requirements.txt
 commands = {posargs}
 
+[testenv:cover]
+commands =
+    bash -x {toxinidir}/setup-test-env.sh python setup.py testr --slowest --coverage --testr-args="{posargs}"
+
 [testenv:pep8]
 deps = hacking>=0.9.2,<0.10
 commands =