def test_floating_point_wait_raises_error():
# A floating point value should reaise a TraitletError
event_widget = Event()
with pytest.raises(traitlets.traitlets.TraitError) as e:
event_widget.wait = 15.0
assert "'wait' trait of an Event instance" in str(e)
def test_negative_wait_raises_error():
# negative wait should raise an error.
event_widget = Event()
with pytest.raises(ValueError) as e:
event_widget.wait = -20
assert 'wait must be set to a non-negative integer. ' in str(e)
def test_setting_wait_with_debounce_set_preserves_debounce(slow_method):
# If debounce is set but wait is zero and wait is then set to something
# non-zero then throttle_or_debounce should still stay debounce.
event_widget = Event()
event_widget.throttle_or_debounce = slow_method
# Make sure wait is currently zero...
assert event_widget.wait == 0
# This shouldn't change throttle or debounce
event_widget.wait = 20
assert event_widget.throttle_or_debounce == slow_method
def test_setting_wait_with_no_throttle_or_debounce():
# If wait is set to something non-zero AND neither throttle
# nor debounce has been set then it should be set to
# throttle.
event_widget = Event()
# Make sure throttle_or_debounce is not set...
assert not event_widget.throttle_or_debounce
# ...and that wait is currently zero
assert event_widget.wait == 0
# This implicitly sets throttle_or_debounce
event_widget.wait = 20
assert event_widget.throttle_or_debounce == 'throttle'