py.test does not extract data from the database

Question

Good afternoon.

I'm testing api based on django-rest-framework using pytest. As far as I knew at the beginning of the test, py.test creates a duplicate database with the prefix test_. But the pattern during writing tests noticed that it is not receiving data from the database. That is a duplicate of this supposedly empty. A simple example:

@pytest.mark.django_db
def test_db():
    qs = Category.objects.get(id=4)
    assert qs['id'] = 4

Its returns this error below, but in a database, object with id=4 exists.

>       assert qs['id'] == 4
E       assert [] == 4

I am new to testing, may miss something, help please.

Answer 1

Like Daniel commented, test DB is initially empty. You can add any data you want for testing by using one of two methods:

1. Django Fixtures - You can add data using a JSON file just like initial data.
2. Mock data using a library such as django dynamic fixture during run time.

These are your best bets.