'Test parameters filtering based on the prefix.
With ``assertion_prefix`` set to fixed, non default value,
issue an unscoped token from assertion EMPLOYEE_ASSERTION_PREFIXED.
Expect server to return unscoped token.'

def test_assertion_prefix_parameter(self):

    self.config_fixture.config(group='federation', assertion_prefix=self.ASSERTION_PREFIX)
    r = self._issue_unscoped_token(assertion='EMPLOYEE_ASSERTION_PREFIXED')
    self.assertIsNotNone(r.headers.get('X-Subject-Token'))
