def test_subtract_overlap(self):
rangeset = RangeSet()
rangeset.add(1, 4)
rangeset.add(6, 8)
rangeset.add(10, 20)
rangeset.add(30, 40)
self.assertEqual(
list(rangeset),
[range(1, 4),
range(6, 8),
range(10, 20),
range(30, 40)])
rangeset.subtract(0, 2)
self.assertEqual(
list(rangeset),
[range(2, 4),
range(6, 8),
range(10, 20),
range(30, 40)])
rangeset.subtract(3, 11)
self.assertEqual(
list(rangeset),
[range(2, 3), range(11, 20),
range(30, 40)])
def test_subtract(self):
rangeset = RangeSet()
rangeset.add(0, 10)
rangeset.add(20, 30)
rangeset.subtract(0, 3)
self.assertEqual(list(rangeset), [range(3, 10), range(20, 30)])
def test_subtract_no_change(self):
rangeset = RangeSet()
rangeset.add(5, 10)
rangeset.add(15, 20)
rangeset.add(25, 30)
rangeset.subtract(0, 5)
self.assertEqual(
list(rangeset),
[range(5, 10), range(15, 20),
range(25, 30)])
rangeset.subtract(10, 15)
self.assertEqual(
list(rangeset),
[range(5, 10), range(15, 20),
range(25, 30)])
def test_subtract_split(self):
rangeset = RangeSet()
rangeset.add(0, 10)
rangeset.subtract(2, 5)
self.assertEqual(list(rangeset), [range(0, 2), range(5, 10)])