def test_double_event_handler_attachment(connection):
handler1 = DefaultHandler()
handler2 = DefaultHandler()
sub = dxc.dxf_create_subscription(cc=connection, event_type='Trade')
sub.set_event_handler(handler1)
dxc.dxf_attach_listener(sub)
symbols = ['AAPL', 'MSFT']
dxc.dxf_add_symbols(sub, symbols)
sub.set_event_handler(handler2)
assert sub.get_event_handler() is handler2
assert set(dxc.dxf_get_symbols(sub)) == set(symbols)
def _attach_default_listener(self):
"""
Method to attach default listener. If event handler was not previously set, DefaultHandler will be initialized.
Returns
-------
self: Subscription
"""
if not self.get_event_handler():
self.set_event_handler(DefaultHandler())
simplefilter(action='ignore', category=FutureWarning)
dxp.dxf_attach_listener(self.__sub)
simplefilter(action='default', category=FutureWarning)
return self
