'Validate trust request fails without `impersonation`.'

def test_validate_trust_without_impersonation_fails(self):

    request_to_validate = {'trustee_user_id': uuid.uuid4().hex, 'trustor_user_id': uuid.uuid4().hex}
    self.assertRaises(exception.SchemaValidationError, self.create_trust_validator.validate, request_to_validate)
