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