class UnitTestObserver(unittest.TestCase):
'''Testing class'''
def setUp(self):
self.undOb = Observable()
self.bot1 = TestObserver()
self.bot2 = TestObserver()
def tearDown(self):
del self.undOb
del self.bot1
del self.bot2
def test_defaultNoObserver(self):
self.assertEqual(len(self.undOb.observers),0," Observer list is not empty")
def test_DuplicateObservers(self):
self.undOb.register(self.bot1)
self.undOb.register(self.bot2)
self.undOb.register(self.bot1)
self.assertEqual(len(self.undOb.observers),2,"Duplicate observers registered")
def test_RemoveAllSubscribers(self):
self.undOb.register(self.bot1)
self.undOb.register(self.bot2)
self.undOb.register(self.bot1)
self.undOb.unregister_all()
self.assertEqual(len(self.undOb.observers), 0, "Observers still registered")
print(key,":",value)
class ObserverB(BaseClass):
'''A type of observerA class'''
def __init__(self):
'''Observer A constructor'''
def update(self, *args, **kwargs):
'''update callback which would be invoked'''
print("ObserverB update invoked")
for arg in args:
print(arg)
for key,value in kwargs.items():
print(key,":",value)
if __name__ == "__main__":
underObservation = Observable()
bot1 = ObserverA()
bot2 = ObserverB()
underObservation.register(bot1)
underObservation.register(bot2)
underObservation.update_observers(('SMA indicates SELL', 'Bollinger Resistance', 'SELL'), {"Lotsize": 37,
"TakeProfit": 300,
"SL": 50})
from Observable import Observable
from observer import Observer
class AmericanStockMarket(Observer):
def update(self, *args, **kwargs):
print("American stock market received: {0}\n{1}".format(args, kwargs))
class EuropeanStockMarket(Observer):
def update(self, *args, **kwargs):
print("European stock market received: {0}\n{1}".format(args, kwargs))
if __name__ == "__main__":
observable = Observable()
american_observer = AmericanStockMarket()
observable.register(american_observer)
european_observer = EuropeanStockMarket()
observable.register(european_observer)
observable.update_observers('Market Rally', something='Hello World')
