Django ORM - mock values().filter() chain
Try this:
import mockfrom mocktest.mockme.models import MyModelclass SimpleTest(TestCase): def test_chained_query(self): my_model_value_mock = mock.patch(MyModel.objects, 'value') my_model_value_mock.return_value.filter.return_value.count.return_value = 10000 self.assertTrue(my_model_value_mock.return_value.filter.return_value.count.called)
@Gin's answer got me most of the way there, but in my case I'm patching MyModel.objects, and the query I'm mocking looks like this:
MyModel.objects.filter(arg1=user, arg2=something_else).order_by('-something').first()
so this worked for me:
@patch('MyModel.objects')def test_a_function(mock, a_fixture): mock.filter.return_value.order_by.return_value.first.return_value = a_fixture result = the_func_im_testing(arg1, arg2) assert result == 'value'Also, the order of the patched attributes matters, and must match the order you're calling them within the tested function.