gistfile1.py

def test_refer_physician_no_caller(self):
    signals.referral_without_caller.disconnect(alerts.referral_without_caller)
    
    callback_called = Ref(False)
    def cb(sender, **kwargs):
        callback_called(True)
    signals.referral_without_caller.connect(cb)
    
    physician = milkman.deliver(Physician, is_active=True)
    
    try:
        self.vut.get(views.refer_caller_to_physician, [physician.id], {'disposition': ''})
    except KeyError:
        pass
    else:
        self.fail("Should have a KeyError")
    assert callback_called()