def test_notification_manager_no_gui_with_threading():
"""
Direct test of the notification manager.
This does not test the integration with the gui, but test that
exceptions and warnings from threads are correctly captured.
"""
def _warn():
time.sleep(0.01)
warnings.showwarning('this is a warning', UserWarning, '', 0)
def _raise():
time.sleep(0.01)
with pytest.raises(PurposefulException):
raise PurposefulException("this is an exception")
if PY38_OR_HIGHER:
previous_threading_exhook = threading.excepthook
with notification_manager:
notification_manager.records.clear()
# save all of the events that get emitted
store: List[Notification] = []
_append = lambda e: store.append(e) # lambda needed on py3.7 # noqa
notification_manager.notification_ready.connect(_append)
# Test exception inside threads
if PY38_OR_HIGHER:
# `threading.excepthook` available only for Python >= 3.8
assert (threading.excepthook ==
notification_manager.receive_thread_error)
exception_thread = threading.Thread(target=_raise)
exception_thread.start()
time.sleep(0.02)
if PY38_OR_HIGHER:
threading.excepthook(sys.exc_info())
else:
sys.excepthook(*sys.exc_info())
assert len(notification_manager.records) == 1
assert store[-1].type == 'error'
# Test warning inside threads
assert warnings.showwarning == notification_manager.receive_warning
warning_thread = threading.Thread(target=_warn)
warning_thread.start()
time.sleep(0.02)
assert len(notification_manager.records) == 2
assert store[-1].type == 'warning'
# make sure we've restored the threading except hook
if PY38_OR_HIGHER:
assert threading.excepthook == previous_threading_exhook
assert all(isinstance(x, Notification) for x in store)
def test_notification_manager_no_gui_with_threading():
"""
Direct test of the notification manager.
This does not test the integration with the gui, but test that
exceptions and warnings from threads are correctly captured.
"""
def _warn():
warnings.showwarning('this is a warning', UserWarning, '', 0)
def _raise():
with pytest.raises(PurposefulException):
raise PurposefulException("this is an exception")
previous_threading_exhook = threading.excepthook
with notification_manager:
notification_manager.records.clear()
# save all of the events that get emitted
store: List[Notification] = []
notification_manager.notification_ready.connect(store.append)
# Test exception inside threads
assert (
threading.excepthook == notification_manager.receive_thread_error)
exception_thread = threading.Thread(target=_raise)
exception_thread.start()
exception_thread.join(timeout=DEFAULT_TIMEOUT_SECS)
try:
raise ValueError("a")
except ValueError:
threading.excepthook(sys.exc_info())
assert len(notification_manager.records) == 1
assert store[-1].type == 'error'
# Test warning inside threads
assert warnings.showwarning == notification_manager.receive_warning
warning_thread = threading.Thread(target=_warn)
warning_thread.start()
warning_thread.join(timeout=DEFAULT_TIMEOUT_SECS)
assert len(notification_manager.records) == 2
assert store[-1].type == 'warning'
# make sure we've restored the threading except hook
assert threading.excepthook == previous_threading_exhook
assert all(isinstance(x, Notification) for x in store)
def test_excepthook_thread_None(self):
# threading.excepthook called with thread=None: log the thread
# identifier in this case.
with support.captured_output("stderr") as stderr:
try:
raise ValueError("bug")
except Exception as exc:
args = threading.ExceptHookArgs([*sys.exc_info(), None])
threading.excepthook(args)
stderr = stderr.getvalue().strip()
self.assertIn(f'Exception in thread {threading.get_ident()}:\n', stderr)
self.assertIn('Traceback (most recent call last):\n', stderr)
self.assertIn(' raise ValueError("bug")', stderr)
self.assertIn('ValueError: bug', stderr)
