def test_auth_form_warns_if_username_does_not_exist(self):
# username doesn't exist yet
form = AuthenticationForm(None, {
"username": "******"
})
self.assertFalse(form.is_valid())
self.assertTrue(form.has_error("username", code="username"))
make(get_user_model(), username="******")
# username does exist now
form = AuthenticationForm(None, {
"username": "******"
})
self.assertFalse(form.is_valid())
self.assertFalse(form.has_error("username", code="username"))
