def test_cal_datapos(self):
textend = 2
datasize = 8
start_expected = 4
end_expected = 11
start, end = TextSegment.cal_datapos(textend, datasize)
assert start == start_expected
assert end == end_expected
textend = 999
datasize = 9000
start_expected = 1007
end_expected = 10006
start, end = TextSegment.cal_datapos(textend, datasize)
assert start == start_expected
assert end == end_expected
def test_data_pos(self):
assert TextSegment.cal_datapos(10, 100) == (14, 113)