test_admin.py

from funkwhale_api.users.admin import MyUserCreationForm


def test_clean_username_success(db):
    # Instantiate the form with a new username
    form = MyUserCreationForm({
        'username': 'alamode',
        'password1': '123456',
        'password2': '123456',
    })
    # Run is_valid() to trigger the validation
    valid = form.is_valid()
    assert valid

    # Run the actual clean_username method
    username = form.clean_username()
    assert 'alamode' == username


def test_clean_username_false(factories):
    user = factories['users.User']()
    # Instantiate the form with the same username as self.user
    form = MyUserCreationForm({
        'username': user.username,
        'password1': '123456',
        'password2': '123456',
    })
    # Run is_valid() to trigger the validation, which is going to fail
    # because the username is already taken
    valid = form.is_valid()
    assert not valid

    # The form.errors dict should contain a single error called 'username'
    assert len(form.errors) == 1
    assert 'username' in form.errors