'Check that the id() of the doctests\' case object contains the FQPN of
the actual tests.'

def test_id(self):

    loader = runner.TestLoader()
    suite = loader.loadDoctests(mockdoctest)
    idPrefix = 'twisted.trial.test.mockdoctest.Counter'
    for test in suite._tests:
        self.assertIn(idPrefix, itrial.ITestCase(test).id())
