Add back in permissions tests.

Author: theengineear

circle.yml

@@ -27,11 +27,11 @@ test:
     # run test suite in all our python versions
     - bash circle/test.sh
 
-#    # test that it imports when you don't have file permissions
-#    - sudo chmod 400 ${PLOTLY_CONFIG_DIR} && python -c "import plotly"
-#
-#    # test that setting permissions will work for import (and tests)
-#    - sudo chmod 600 ${PLOTLY_CONFIG_DIR} && python -c "import plotly"
+    # test that it imports when you don't have write permissions
+    - sudo chmod 444 ${PLOTLY_CONFIG_DIR} && python -c "import plotly"
+
+    # test that giving back write permissions works again
+    - sudo chmod 666 ${PLOTLY_CONFIG_DIR} && python -c "import plotly"
 
     # test core things in the general 2.7 version that circle has
     - nosetests -xv plotly/tests/test_core --with-coverage --cover-package=plotly