def test_delta_medium_object(self):
# This tests an object set that will have a copy operation
# 2**20 in size.
with self.get_pack(pack1_sha) as orig_pack:
orig_blob = orig_pack[a_sha]
new_blob = Blob()
new_blob.data = orig_blob.data + (b'x' * 2**20)
new_blob_2 = Blob()
new_blob_2.data = new_blob.data + b'y'
all_to_pack = list(orig_pack.pack_tuples()) + [(new_blob, None),
(new_blob_2, None)]
pack_path = os.path.join(self._tempdir, 'pack_with_deltas')
write_pack(pack_path, all_to_pack, deltify=True)
output = run_git_or_fail(['verify-pack', '-v', pack_path])
self.assertEqual(set(x[0].id for x in all_to_pack),
_git_verify_pack_object_list(output))
# We specifically made a new blob that should be a delta
# against the blob a_sha, so make sure we really got only 3
# non-delta objects:
got_non_delta = int(_NON_DELTA_RE.search(output).group('non_delta'))
self.assertEqual(
3, got_non_delta,
'Expected 3 non-delta objects, got %d' % got_non_delta)
# We expect one object to have a delta chain length of two
# (new_blob_2), so let's verify that actually happens:
self.assertIn(b'chain length = 2', output)
def test_copy(self):
with self.get_pack(pack1_sha) as origpack:
self.assertSucceeds(origpack.index.check)
pack_path = os.path.join(self._tempdir, "Elch")
write_pack(pack_path, origpack.pack_tuples())
output = run_git_or_fail(['verify-pack', '-v', pack_path])
orig_shas = set(o.id for o in origpack.iterobjects())
self.assertEqual(orig_shas, _git_verify_pack_object_list(output))
def test_copy(self):
with self.get_pack(pack1_sha) as origpack:
self.assertSucceeds(origpack.index.check)
basename = os.path.join(self.tempdir, 'Elch')
write_pack(basename, origpack.pack_tuples())
with Pack(basename) as newpack:
self.assertEqual(origpack, newpack)
self.assertSucceeds(newpack.index.check)
self.assertEqual(origpack.name(), newpack.name())
self.assertEqual(origpack.index.get_pack_checksum(),
newpack.index.get_pack_checksum())
wrong_version = origpack.index.version != newpack.index.version
orig_checksum = origpack.index.get_stored_checksum()
new_checksum = newpack.index.get_stored_checksum()
self.assertTrue(wrong_version or orig_checksum == new_checksum)
def test_deltas_work(self):
with self.get_pack(pack1_sha) as orig_pack:
orig_blob = orig_pack[a_sha]
new_blob = Blob()
new_blob.data = orig_blob.data + b'x'
all_to_pack = list(orig_pack.pack_tuples()) + [(new_blob, None)]
pack_path = os.path.join(self._tempdir, 'pack_with_deltas')
write_pack(pack_path, all_to_pack, deltify=True)
output = run_git_or_fail(['verify-pack', '-v', pack_path])
self.assertEqual(set(x[0].id for x in all_to_pack),
_git_verify_pack_object_list(output))
# We specifically made a new blob that should be a delta
# against the blob a_sha, so make sure we really got only 3
# non-delta objects:
got_non_delta = int(_NON_DELTA_RE.search(output).group('non_delta'))
self.assertEqual(
3, got_non_delta,
'Expected 3 non-delta objects, got %d' % got_non_delta)
def test_delta_large_object(self):
# This tests an object set that will have a copy operation
# 2**25 in size. This is a copy large enough that it requires
# two copy operations in git's binary delta format.
raise SkipTest('skipping slow, large test')
with self.get_pack(pack1_sha) as orig_pack:
new_blob = Blob()
new_blob.data = 'big blob' + ('x' * 2**25)
new_blob_2 = Blob()
new_blob_2.data = new_blob.data + 'y'
all_to_pack = list(orig_pack.pack_tuples()) + [(new_blob, None),
(new_blob_2, None)]
pack_path = os.path.join(self._tempdir, "pack_with_deltas")
write_pack(pack_path, all_to_pack, deltify=True)
output = run_git_or_fail(['verify-pack', '-v', pack_path])
self.assertEqual(set(x[0].id for x in all_to_pack),
_git_verify_pack_object_list(output))
# We specifically made a new blob that should be a delta
# against the blob a_sha, so make sure we really got only 4
# non-delta objects:
got_non_delta = int(_NON_DELTA_RE.search(output).group('non_delta'))
self.assertEqual(
4, got_non_delta,
'Expected 4 non-delta objects, got %d' % got_non_delta)
def _copy_pack(self, origpack):
basename = os.path.join(self.tempdir, 'somepack')
write_pack(basename, origpack.pack_tuples())
return Pack(basename)