def _assert_object_writing(self, db):
"""General tests to verify object writing, compatible to ObjectDBW
**Note:** requires write access to the database"""
# start in 'dry-run' mode, using a simple sha1 writer
ostreams = (ZippedStoreShaWriter, None)
for ostreamcls in ostreams:
for data in self.all_data:
dry_run = ostreamcls is not None
ostream = None
if ostreamcls is not None:
ostream = ostreamcls()
assert isinstance(ostream, Sha1Writer)
# END create ostream
prev_ostream = db.set_ostream(ostream)
assert type(
prev_ostream) in ostreams or prev_ostream in ostreams
istream = IStream(str_blob_type, len(data), BytesIO(data))
# store returns same istream instance, with new sha set
my_istream = db.store(istream)
sha = istream.binsha
assert my_istream is istream
assert db.has_object(sha) != dry_run
assert len(sha) == 20
# verify data - the slow way, we want to run code
if not dry_run:
info = db.info(sha)
assert str_blob_type == info.type
assert info.size == len(data)
ostream = db.stream(sha)
assert ostream.read() == data
assert ostream.type == str_blob_type
assert ostream.size == len(data)
else:
self.failUnlessRaises(BadObject, db.info, sha)
self.failUnlessRaises(BadObject, db.stream, sha)
# DIRECT STREAM COPY
# our data hase been written in object format to the StringIO
# we pasesd as output stream. No physical database representation
# was created.
# Test direct stream copy of object streams, the result must be
# identical to what we fed in
ostream.seek(0)
istream.stream = ostream
assert istream.binsha is not None
prev_sha = istream.binsha
db.set_ostream(ZippedStoreShaWriter())
db.store(istream)
assert istream.binsha == prev_sha
new_ostream = db.ostream()
# note: only works as long our store write uses the same compression
# level, which is zip_best
assert ostream.getvalue() == new_ostream.getvalue()
def store(self, istream):
zstream = ZippedStoreShaWriter()
self._db.set_ostream(zstream)
istream = self._db.store(istream)
zstream.close() # close to flush
zstream.seek(0)
# don't provide a size, the stream is written in object format, hence the
# header needs decompression
decomp_stream = DecompressMemMapReader(zstream.getvalue(), close_on_deletion=False)
self._cache[istream.binsha] = OStream(istream.binsha, istream.type, istream.size, decomp_stream)
return istream
def store(self, istream):
zstream = ZippedStoreShaWriter()
self._db.set_ostream(zstream)
istream = self._db.store(istream)
zstream.close() # close to flush
zstream.seek(0)
# don't provide a size, the stream is written in object format, hence the
# header needs decompression
decomp_stream = DecompressMemMapReader(zstream.getvalue(), close_on_deletion=False)
self._cache[istream.binsha] = OStream(istream.binsha, istream.type, istream.size, decomp_stream)
return istream