I have an API endpoint I'm trying to write unit tests for and I can't seem to figure out how to unit test the Python Google Cloud Storage client library calls (https://cloud.google.com/appengine/docs/python/googlecloudstorageclient/). I was hoping to find a stub somewhere in the library and have it be as simple as unit testing the mail API would be (https://cloud.google.com/appengine/docs/python/tools/localunittesting?hl=en), but haven't found anything yet. Any idea how to go about this?
The list of available unit test does not list GCS. You can file a feature request on their GitHub to add that functionality.
In the mean time using the setUp for your tests to create files is probably your best bet.