Testing against a multi-db app with un-managed models [django 1.2.3]

Hi there,

I would like to test a django 1.2.3 application that uses both a sqlite db for auth/users, and an unmanaged postgres database for the application itself. Given that the models are unmanaged, and the postgres database has a very involved, long running set of scripts to build, the right approach seems to be to write a custom test runner which does not call create_test_db() but allows tests to run against an existing, pre-built test database.

The example I have been basing my custom test runner on is from django-test-utls https://raw.github.com/ericholscher/django-test-utils/master/test_utils/test_runners/keep_database.py

This seems to assume that the application only has one database however.

My no doubt imperfect understanding how how the test runner works, is that settings.DATABASES['default']['NAME'] is swapped out with settings.DATABASES['default']['TEST_NAME'], and then swapped back after unittest.TextTestRunner() is called. A point of confusion here is that connection.settings_dict['DATABASE_NAME'] only appears to take one database key.

Here is my test runner currently (default = sqlite, alt_db = pg):

https://gist.github.com/3174450

When my tests run at the moment, they fail with KeyError: 'SUPPORTS_TRANSACTIONS'.

Is there some way that I can have the test runner create a test sqlite database, but also setup a connection to the existing test postgresql db?

Apologies if this all sounds a bit convoluted!

Many thanks

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