'Stores an L{IProtocol} provider and the flag to log/drop stderr'

def test_constructor(self):

    d = self.ep.connect(self.factory)
    self.successResultOf(d)
    wpp = self.reactor.processProtocol
    self.assertIsInstance(wpp.protocol, StubApplicationProtocol)
    self.assertEqual(wpp.errFlag, self.ep._errFlag)
