将pytest与Google AppEngine一起使用

Question

My GAE app runs correctly on the local host (using dev_appserver.py app ) and when deployed ( appcfg.py name update app/ )

However, when I run py.test on test code (in my app's directory), I get an import error:

app/main.py:4: in <module>
    from google.appengine.ext import db
E   ImportError: No module named google.appengine.ext

GAE is installed here: /Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/ and it contains google/appengine/ext/

I have added the google-cloud-sdk to my $PATH, and there is a symlink in /usr/local/ to GAE:

lrwxr-xr-x    1 root       admin    google_appengine -> /Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine

How can I get py.test to find google.appengine.ext?

Answer 1

Something like

sys.path.insert(0, '/Applications/GoogleAppEngineLauncher.app/Contents/Resources/GoogleAppEngine-default.bundle/Contents/Resources/google_appengine/')

in your tests may work, but better use nosetests with nose-gae extension.

Answer 2

You see the error because the Google App Engine SDK is not in your Python path.

You can manually interfere with sys.path at the beginning of your test scripts or package, use nose-gae extension or, you use something like (shameless plug - I wrote it) testable_appengine to automate setting up a virtualenv with Google's SDK and some other nice things (like nose, without the nose-age plugins). It works seamlessly because, once you activate the virtualenv, the SDK is automatically added to your path.