def test_nonmonotonic_warning(caplog):
pages = _pages_from_ranges('1, 3, 2')
assert pages == {0, 1, 2}
assert 'out of order' in caplog.text
def test_list_range():
assert _pages_from_ranges([0, 1, 2]) == {0, 1, 2}
def test_pages(pages, result):
if isinstance(result, type):
with pytest.raises(result):
_pages_from_ranges(pages)
else:
assert _pages_from_ranges(pages) == result
