'L{lazyByteSlice} called with some bytes, an offset and a length returns
a semantically equal version of these bytes starting at the given
offset, up to the given length.'

def test_lazyByteSliceOffsetAndLength(self):

    data = '123XYZ'
    self.assertEqual(bytes(lazyByteSlice(data, 2, 3)), data[2:5])
