Test Driven Development with Django
In Django, the approach is always to recreate a working environment for testing and staging. In testing the data is fake, in staging the data is "old" or very similar to the production.
I have a conceptual question about doing test driven development with Django, may also apply to other frameworks as well.
TDD states that the firts step in the development cycle is to write failing tests. 
Suppose for a unit test, I want to verify that an item is actually created when a request arrives. To test this functioanlty, I want to issue a request with the test client, and check with the db that this object is actully created. To be able to do that, I need to import the related model in the test file, but as the first step is writing this test, I don't even have a model yet. So I won't be able to run the tests to see them fail.
What is the suggested approach here? Maybe write a simpler test first, then modify the test after enough level of production code is implemented?