'Validate trust request with invalid `expires_at` fails.'

def test_validate_trust_with_invalid_expires_at_fails(self):

    request_to_validate = {'trustor_user_id': uuid.uuid4().hex, 'trustee_user_id': uuid.uuid4().hex, 'impersonation': False, 'expires_at': 3}
    self.assertRaises(exception.SchemaValidationError, self.create_trust_validator.validate, request_to_validate)
