import progressbar

def test_unknown_length() -> None:

pb = progressbar.ProgressBar(

widgets=[progressbar.AnimatedMarker()],

max_value=progressbar.UnknownLength,

)

assert pb.max_value is progressbar.UnknownLength

def test_unknown_length_default_widgets() -> None:

# The default widgets picked should work without a known max_value

pb = progressbar.ProgressBar(max_value=progressbar.UnknownLength).start()

for i in range(60):

pb.update(i)

pb.finish()

def test_unknown_length_at_start() -> None:

# The default widgets should be picked after we call .start()

pb = progressbar.ProgressBar().start(max_value=progressbar.UnknownLength)

for i in range(60):

pb.update(i)

pb.finish()

pb2 = progressbar.ProgressBar().start(max_value=progressbar.UnknownLength)

for w in pb2.widgets:

print(type(w), repr(w))

assert any(isinstance(w, progressbar.Bar) for w in pb2.widgets)

def test_unknown_length_redraws_on_value_change() -> None:

# With an unknown length and a non-time-sensitive widget (no

# `INTERVAL`), the bar still needs to redraw whenever the value

# advances; otherwise it would only ever show the start and finish

# values. See the `format_label` example.

pb = progressbar.ProgressBar(

widgets=[progressbar.FormatLabel('%(value)d')],

max_value=progressbar.UnknownLength,

).start()

assert pb.poll_interval is None

pb.previous_value = 2

pb.value = 3

# Make sure the min_poll_interval rate limit is not what blocks us

pb._last_update_timer -= 10

assert pb._needs_update() is True

pb.finish()