Adding system tests to make sure token exchange works as expected.

- Updates CONTRIBUTING.md to explain how to set-up and run these tests.
- Requires a version of httplib2 that has not been released on PyPI
  yet in order to work on Python 3.
- Simply creates 3 different token types (JSON key for svc. acct.,
  P12 key for svc. acct., JSON key for user acct.) and then authorizes
  an httplib2.Http object to hit the USERINFO API.

1 files changed, 18 insertions, 0 deletions

diff --git a/tox.ini b/tox.ini
index 639b56b..578e3b5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -72,3 +72,21 @@ basepython = python2.7
 deps = {[testenv]basedeps}
        django>=1.5,<1.6
        pyopenssl<0.14
+
+[testenv:system-tests]
+basepython =
+    python2.7
+commands =
+    {toxinidir}/scripts/run_system_tests.sh
+deps =
+    pycrypto==2.6
+    pyopenssl==0.14
+
+[testenv:system-tests3]
+basepython =
+    python3.4
+commands =
+    {toxinidir}/scripts/run_system_tests.sh
+deps =
+    pycrypto==2.6
+    pyopenssl==0.14