def test_map_errors_log():
a = Stream(asynchronous=True)
b = a.delay(0.001).map(lambda x: 1 / x)
with captured_logger('streamz') as logger:
a._emit(0)
yield gen.sleep(0.1)
out = logger.getvalue()
assert 'ZeroDivisionError' in out
def test_accumulate_errors_log():
a = Stream(asynchronous=True)
b = a.delay(0.001).accumulate(lambda x, y: x / y)
with captured_logger('streamz') as logger:
a._emit(1)
a._emit(0)
yield gen.sleep(0.1)
out = logger.getvalue()
assert 'ZeroDivisionError' in out
