def test_chained_emitters(self):
"""Chained emitters"""
em1 = EventEmitter(source=None, type='test_event1')
em2 = EventEmitter(source=self, type='test_event2')
em1.connect(em2)
em1.connect(self.record_event)
self.result = None
ev = em1()
self.assert_result(event=ev, event_class=Event, source=None, type='test_event1', sources=[None])
# sources look different from second emitter, but type is the same.
em1.disconnect(self.record_event)
em2.connect(self.record_event)
self.result = None
ev = em1()
self.assert_result(event=ev, event_class=Event, source=self, type='test_event1', sources=[None,self])
def test_emission_order(self):
"""Event emission order"""
em = EventEmitter(type='test_event')
def cb1(ev):
self.result = 1
def cb2(ev):
self.result = 2
em.connect(cb1)
em.connect(cb2)
self.result = None
em()
assert self.result == 1, "Events emitted in wrong order"
em.disconnect()
em.connect(cb2)
em.connect(cb1)
self.result = None
em()
assert self.result == 2, "Events emitted in wrong order"
def test_disconnect(self):
"""Emitter disconnection"""
em = EventEmitter(type='test_event')
def cb1(ev):
self.result = 1
def cb2(ev):
self.result = 2
em.connect((self, 'record_event'))
em.connect(cb1)
em.connect(cb2)
self.result = None
em.disconnect(cb2)
ev = em()
self.assert_result(event=ev)
self.result = None
em.disconnect((self, 'record_event'))
ev = em()
assert self.result == 1
self.result = None
em.connect(cb1)
em.connect(cb2)
em.connect((self, 'record_event'))
em.disconnect()
em()
assert self.result == None
def test_source_stack_integrity(self):
"""Emitter checks source stack"""
em = EventEmitter(type='test_event')
def cb(ev):
ev._sources.append('x')
em.connect(cb)
try:
em()
except RuntimeError as err:
if str(err) != 'Event source-stack mismatch.':
raise
em.disconnect()
def cb(ev):
ev._sources = []
em.connect(cb)
try:
em()
except IndexError:
pass