Support coverage

This patch provides coverage support in order to check quality of
the code.

Change-Id: Id962288fee3d57b679fc126ef7b498d6d34598f2

.gitignore

@@ -9,3 +9,5 @@
 .vagrant
 .idea
 .tox
+.coverage
+cover

test-requirements.txt

@@ -1,5 +1,6 @@
 # mock object framework
+coverage>=3.6 # Apache-2.0
 hacking>=0.10.2
 flake8>=2.2.4
 nose==1.3.0
-mock>=1.0.1
+mock>=1.0.1

tox.ini

@@ -1,7 +1,7 @@
 [tox]
 minversion = 2.0
 skipsdist = True
-envlist = py27,pep8
+envlist = py27,pep8,cover
 
 [testenv]
 usedevelop = True
@@ -16,10 +16,16 @@ deps = -r{toxinidir}/requirements.txt
 whitelist_externals = bash
                       find
 commands =
-    find ./ -type f -name "*.pyc" -delete
+    find ./ -type f -name "*.py[c|o]" -delete
     nosetests -w test
 
 [testenv:cover]
+setenv = VIRTUAL_ENV={envdir}
+         NOSE_WITH_COVERAGE=1
+         NOSE_COVER_BRANCHES=1
+         NOSE_COVER_HTML=1
+         NOSE_COVER_HTML_DIR={toxinidir}/cover
+         PYTHONPATH={homedir}/spark/spark-1.6.1/python:{homedir}/spark/spark-1.6.1/python/lib/py4j-0.9-src.zip:
 
 [testenv:pep8]
 commands =