Merge pull request #11603 from edx/usman/migrations-setup

Update migrations setup during Python unit tests

lms/envs/test.py

@@ -24,6 +24,7 @@ from path import Path as path
 from uuid import uuid4
 from warnings import filterwarnings, simplefilter
 
+from util.db import NoOpMigrationModules
 from openedx.core.lib.tempdir import mkdtemp_clean
 
 # This patch disables the commit_on_success decorator during tests
@@ -86,7 +87,7 @@ PARENTAL_CONSENT_AGE_LIMIT = 13
 SOUTH_TESTS_MIGRATE = False  # To disable migrations and use syncdb instead
 
 # Nose Test Runner
-TEST_RUNNER = 'django_nose.NoseTestSuiteRunner'
+TEST_RUNNER = 'openedx.core.djangolib.nose.NoseTestSuiteRunner'
 
 _SYSTEM = 'lms'
 
@@ -188,9 +189,10 @@ DATABASES = {
 
 }
 
-# This hack disables migrations during tests. We want to create tables directly from the models for speed.
-# See https://groups.google.com/d/msg/django-developers/PWPj3etj3-U/kCl6pMsQYYoJ.
-MIGRATION_MODULES = {app: "app.migrations_not_used_in_tests" for app in INSTALLED_APPS}
+if os.environ.get('DISABLE_MIGRATIONS'):
+    # Create tables directly from apps' models. This can be removed once we upgrade
+    # to Django 1.9, which allows setting MIGRATION_MODULES to None in order to skip migrations.
+    MIGRATION_MODULES = NoOpMigrationModules()
 
 CACHES = {
     # This is the cache used for most things.