class _AuthLdapNoEmailMock():

    def __init__(self, **kwargs):

        pass

    def authenticate_ldap(self, username, password):

        return 'spam dn', dict(test_ldap_firstname=['spam ldap first name'],

                               test_ldap_lastname=['spam ldap last name'],

                               test_ldap_email=[''])

def test_init_user_attributes_from_ldap_with_missing_email(monkeypatch,

                                                           arrange_ldap_auth):

    """Authenticate unknown user with mocked LDAP where email is missing.

    """

    # Arrange test user.

    uniqifier = uuid.uuid4()

    username = 'test-user-{}'.format(uniqifier)

    assert User.get_by_username(username) is None

    # Arrange LDAP auth.

    monkeypatch.setattr(auth_ldap, 'AuthLdap', _AuthLdapNoEmailMock)

    # Authenticate with LDAP.

    user_data = authenticate(username, 'password')

    # Verify that authenication succeeded and retrieved correct attributes

    # from LDAP, with empty email.

    assert user_data is not None

    assert user_data.get('firstname') == 'spam ldap first name'

    assert user_data.get('lastname') == 'spam ldap last name'

    assert user_data.get('email') == ''

    # Verify that authentication created new user with attributes

    # retrieved from LDAP, with email == None.

    new_user = User.get_by_username(username)

    assert new_user is not None

    assert new_user.firstname == 'spam ldap first name'

    assert new_user.lastname == 'spam ldap last name'

    assert new_user.email is None