Running Google AppEngine Django Unit Test Cases

If you want to run standalone google appengine code, you will need to establish some setup routines and initializations. Here is some code that I used to prepare the google appengine datastore and run a collection of python unit test cases.

#!/usr/bin/env python

'''
 Author: Berlin Brown
 Filename: run_all_tests.py 
 Application: test case for botlist django front-end (ghostnet)
 Environment: Python 2.5.2
 -------------------------- Description --

 With the following code, you can run google-appengine
 stand-alone database driven test cases.

 * Run batch python unit test scripts
 * The script ensures that the google libraries are imported and
   added to the python sys path.
 
'''

import os
import sys
import unittest

# Add the parent directory, ghostnet to the sys path.
# We are assuming that google_appengine is also in the
# For example:
# -----------------------------
# PROJECT_HOME/google_appengine
# PROJECT_HOME/projects/ghostnet/tests

DIR_PATH = os.path.abspath(os.path.dirname(os.path.realpath(__file__)))
PROJECT_HOME = os.path.join(DIR_PATH, '..', '..', '..')

print("INFO: project_home=%s" % PROJECT_HOME)

EXTRA_PATHS = [
  DIR_PATH,
  os.path.join(PROJECT_HOME, 'projects', 'ghostnet'),
  os.path.join(PROJECT_HOME, 'google_appengine'),
  os.path.join(PROJECT_HOME, 'google_appengine', 'lib', 'django'),
  os.path.join(PROJECT_HOME, 'google_appengine', 'lib', 'webob'),
  os.path.join(PROJECT_HOME, 'google_appengine', 'lib', 'yaml', 'lib')
]
sys.path = EXTRA_PATHS + sys.path

# End of path setup

import datetime
import logging

# Google App Engine includes
from google.appengine.api import apiproxy_stub_map
from google.appengine.api import datastore_file_stub
from google.appengine.api import mail_stub
from google.appengine.api import user_service_stub 
from google.appengine.ext import db

APP_ID = 'ghostnet_tests'
DS_PATH = '/tmp/dev_ds_tests.db'
HIST_PATH = '/tmp/dev_ds_tests.hist'

apiproxy_stub_map.apiproxy.RegisterStub(
        'user',
        user_service_stub.UserServiceStub())

# From the dev_appserver source:
# ----------------------
#  datastore = datastore_file_stub.DatastoreFileStub(
#      app_id, datastore_path, history_path, require_indexes=require_indexes)
# ----------------------
apiproxy_stub_map.apiproxy.RegisterStub(
        'datastore_v3',
        datastore_file_stub.DatastoreFileStub('ghostnet_tests',
                                              DS_PATH,
                                              HIST_PATH))
apiproxy_stub_map.apiproxy.RegisterStub(
        'mail',
        mail_stub.MailServiceStub())

# ----------------------
# Django Setups
# ----------------------

# A workaround to fix the partial initialization of Django before we are ready
from django.conf import settings
settings._target = None

os.environ['DJANGO_SETTINGS_MODULE'] = 'settings'

# Import various parts of Django.
import django.core.handlers.wsgi
import django.core.signals
import django.dispatch.dispatcher
import django.db

# --------------
# Tests includes
# --------------
from tests.create_models import suite as suite_create
from tests.read_models import suite as suite_read
from tests.agent_rpc_test import suite as suite_rpc
from tests.client.client_rpc_test import suite as suite_client_rpc

def run_test_suite():
        suite = unittest.TestSuite()
        suite.addTest(suite_create())
        suite.addTest(suite_read())
        suite.addTest(suite_rpc())
        suite.addTest(suite_client_rpc())
        runner = unittest.TextTestRunner()
        runner.run(suite)

# End of appengine setups for command-line test apps
        
if __name__ == '__main__':
        print "Running model create"    
        run_test_suite()
        print "Done"

# End of Script