Merge ~powersj/cloud-init:coverage into cloud-init:master

[Joshua Powers]

Adds in coverage collections to cloud-init tox-based unit tests.

[Joshua Powers (powersj)]

Example tox run: https://paste.ubuntu.com/23356016/

[Scott Moser (smoser)]

do we think we need to do coverage on every thing ?
Can we maybe only run it on the py3 tox enviornment? it is somewhat significantly slower than without coverage.

that would seem enough to me.

review: Needs Information

[Joshua Powers (powersj)]

That last commit broke things so this is not safe to merge right now...

My intent was to replicate what we do for curtin [1] and simplestreams [2], which runs it on both py3 and py2.7. If we want to change to just py3 that is fine as it does save some time. Let me get a working commit.

[1] https://jenkins.ubuntu.com/server/job/curtin-ci/nodes=amd64/270/console
[2] https://jenkins.ubuntu.com/server/job/simplestreams-ci/nodes=amd64/26/console

[Joshua Powers (powersj)]

Now working commit: https://paste.ubuntu.com/23384075/

diff --git a/.gitignore b/.gitignore
index 77eb9c7..865cac1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,3 +4,4 @@ dist
 *.pyc
 __pycache__
 .tox
+.coverage
diff --git a/test-requirements.txt b/test-requirements.txt
index 6bf3894..0e7fc8f 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,6 +3,7 @@ httpretty>=0.7.1
 mock
 nose
 unittest2
+coverage
 
 # Only needed if you want to know the test times
 # nose-timer
diff --git a/tox.ini b/tox.ini
index 277858e..08318a9 100644
--- a/tox.ini
+++ b/tox.ini
@@ -19,6 +19,9 @@ setenv =
 
 [testenv:py3]
 basepython = python3
+commands = {envpython} -m nose \
+    {posargs:--with-coverage --cover-erase \
+        --cover-branches --cover-package=cloudinit --cover-inclusive}
 
 [testenv:py26]
 commands = nosetests {posargs:tests}