def test_conact_source(self):
source = ConcatSource([
RangeSource(0, 4),
RangeSource(4, 8),
RangeSource(8, 12),
RangeSource(12, 16),
])
self.assertEqual(list(source.read(source.get_range_tracker())),
list(range(16)))
self.assertEqual(
list(source.read(source.get_range_tracker((1, None), (2, 10)))),
list(range(4, 10)))
range_tracker = source.get_range_tracker(None, None)
self.assertEqual(range_tracker.position_at_fraction(0), (0, 0))
self.assertEqual(range_tracker.position_at_fraction(.5), (2, 8))
self.assertEqual(range_tracker.position_at_fraction(.625), (2, 10))
# Simulate a read.
self.assertEqual(range_tracker.try_claim((0, None)), True)
self.assertEqual(range_tracker.sub_range_tracker(0).try_claim(2), True)
self.assertEqual(range_tracker.fraction_consumed(), 0.125)
self.assertEqual(range_tracker.try_claim((1, None)), True)
self.assertEqual(range_tracker.sub_range_tracker(1).try_claim(6), True)
self.assertEqual(range_tracker.fraction_consumed(), 0.375)
self.assertEqual(range_tracker.try_split((0, 1)), None)
self.assertEqual(range_tracker.try_split((1, 5)), None)
self.assertEqual(range_tracker.try_split((3, 14)), ((3, None), 0.75))
self.assertEqual(range_tracker.try_claim((3, None)), False)
self.assertEqual(range_tracker.sub_range_tracker(1).try_claim(7), True)
self.assertEqual(range_tracker.try_claim((2, None)), True)
self.assertEqual(range_tracker.sub_range_tracker(2).try_claim(9), True)
self.assertEqual(range_tracker.try_split((2, 8)), None)
self.assertEqual(range_tracker.try_split((2, 11)), ((2, 11), 11. / 12))
self.assertEqual(
range_tracker.sub_range_tracker(2).try_claim(10), True)
self.assertEqual(
range_tracker.sub_range_tracker(2).try_claim(11), False)
def test_empty_source(self):
read_all = source_test_utils.read_from_source
empty = RangeSource(0, 0)
self.assertEquals(read_all(ConcatSource([])), [])
self.assertEquals(read_all(ConcatSource([empty])), [])
self.assertEquals(read_all(ConcatSource([empty, empty])), [])
range10 = RangeSource(0, 10)
self.assertEquals(read_all(ConcatSource([range10]), (0, None), (0, 0)),
[])
self.assertEquals(read_all(ConcatSource([range10]), (0, 10), (1, None)),
[])
self.assertEquals(read_all(ConcatSource([range10, range10]),
(0, 10), (1, 0)),
[])
def test_estimate_size(self):
sources = [TestConcatSource.DummySource(range(start, start + 10)) for start
in [0, 10, 20]]
concat = ConcatSource(sources)
self.assertEquals(30, concat.estimate_size())
def test_conact_source_exhaustive(self):
source = ConcatSource([RangeSource(0, 10),
RangeSource(100, 110),
RangeSource(1000, 1010),
])
source_test_utils.assertSplitAtFractionExhaustive(source)
def test_estimate_size(self):
source = ConcatSource([RangeSource(0, 10),
RangeSource(10, 100),
RangeSource(100, 1000),
])
self.assertEqual(source.estimate_size(), 1000)
