def test_emitter_error_handling():
"""Emitter error handling"""
em = EventEmitter(type="test_event")
em.print_callback_errors = "never"
def cb(ev):
raise Exception("test")
em.ignore_callback_errors = True
# first callback fails; second callback still runs.
em.connect(record_event)
em.connect(cb)
record_event.result = None
ev = em()
record_event.assert_result(event=ev)
# this time we should get an exception
record_event.result = None
em.ignore_callback_errors = False
try:
em()
assert False, "Emission should have raised exception"
except Exception as err:
if str(err) != "test":
raise
def test_emitter_loop():
"""Catch emitter loops"""
em1 = EventEmitter(type="test_event1")
em2 = EventEmitter(type="test_event2")
em1.ignore_callback_errors = False
em2.ignore_callback_errors = False
# cross-connect emitters; when we emit, an exception should be raised
# indicating an event loop.
em1.connect(em2)
em2.connect(em1)
with pytest.warns(UserWarning) as record:
em1()
assert "EventEmitter loop detected!" in str(record[0].message)
def test_emitter_loop():
"""Catch emitter loops"""
em1 = EventEmitter(type="test_event1")
em2 = EventEmitter(type="test_event2")
em1.ignore_callback_errors = False
em2.ignore_callback_errors = False
# cross-connect emitters; when we emit, an exception should be raised
# indicating an event loop.
em1.connect(em2)
em2.connect(em1)
try:
em1()
except RuntimeError as err:
if str(err) != "EventEmitter loop detected!":
raise err
