def _write_index(self, fp, index):
index_offset = fp.tell()
compressed = compress(dumps(index))
write_int8_str(fp, compressed)
fp.seek(len(self.MAGIC))
write_int8(fp, index_offset)
assert fp.tell() == len(self.MAGIC) + 8
def e(self):
s = BytesIO()
durus.utils.TRACE = True
for x in ('', 'a', 'ab', 'a' * 1000):
x = as_bytes(x)
s.seek(0)
write_int8_str(s, x)
s.seek(0)
assert x == read_int8_str(s)
durus.utils.TRACE = False