Running test loads initial_data even on migrated app

[patrice@…]

Documentation says that If an application uses migrations, there is no automatic loading of fixtures.
I think we can expect the same when running tests but it appears not to be the case. After a little investigation I noticed:

• the test command calls the migrate commands with a parameter test_flush set to True: ​https://github.com/django/django/blob/1.7c2/django/db/backends/creation.py#L374
• the migrate command calls flush command : ​https://github.com/django/django/blob/1.7c2/django/core/management/commands/migrate.py#L135
• and the flush command runs loaddata with initial_data as a fixture_label : ​https://github.com/django/django/blob/1.7c2/django/core/management/commands/flush.py#L86

This makes running tests fails as it tries to load data before the tables had been created.

[Tim Graham]

Duplicate of #23077