af = ArvadosFile(ArvadosFileReaderTestCase.MockParent(blocks, nocache), stream=stream, segments=[Range(1, 0, 3), Range(6, 3, 3), Range(11, 6, 3)])
return ArvadosFileReader(af, "count.txt")
- def test_read_returns_first_block(self):
- # read() calls will be aligned on block boundaries - see #3663.
+ def test_read_block_crossing_behavior(self):
+ # read() needs to return all the data requested if possible, even if it
+ # crosses uncached blocks: https://arvados.org/issues/5856
sfile = self.make_count_reader(nocache=True)
- self.assertEqual('123', sfile.read(10))
+ self.assertEqual('12345678', sfile.read(8))
def test_successive_reads(self):
+ # Override StreamFileReaderTestCase.test_successive_reads
sfile = self.make_count_reader(nocache=True)
- for expect in ['123', '456', '789', '']:
- self.assertEqual(expect, sfile.read(10))
+ self.assertEqual('1234', sfile.read(4))
+ self.assertEqual('5678', sfile.read(4))
+ self.assertEqual('9', sfile.read(4))
+ self.assertEqual('', sfile.read(4))
def test_tell_after_block_read(self):
+ # Override StreamFileReaderTestCase.test_tell_after_block_read
sfile = self.make_count_reader(nocache=True)
- sfile.read(5)
- self.assertEqual(3, sfile.tell())
+ self.assertEqual('12345678', sfile.read(8))
+ self.assertEqual(8, sfile.tell())
def test_prefetch(self):
keep = ArvadosFileWriterTestCase.MockKeep({"2e9ec317e197819358fbc43afca7d837+8": "01234567", "e8dc4081b13434b45189a720b77b6818+8": "abcdefgh"})