'verifyHostKey() should return a Deferred which fails with a
NotImplementedError exception.  connectionSecure() should raise
NotImplementedError().'

def test_notImplementedClientMethods(self):

    self.assertRaises(NotImplementedError, self.klass().connectionSecure)
    def _checkRaises(f):
        f.trap(NotImplementedError)
    d = self.klass().verifyHostKey(None, None)
    return d.addCallback(self.fail).addErrback(_checkRaises)
