def test_write_read(self, run):
benji_obj = self.benji_open()
store = BenjiStore(benji_obj)
version = store.find_versions(version_uid=self.version_uid)[0]
store.open(version)
cow_version = store.create_cow_version(version)
image_2_filename = os.path.join(self.testpath.path, 'image')
image_2 = bytearray(self.image)
block_size = random.randint(512, 2 * 65536)
for pos in range(0, self.size, block_size):
if pos + block_size > self.size:
write_length = self.size - pos
else:
write_length = block_size
if random.randint(1, 100) <= 25:
if random.randint(0, 1):
image_2[pos:pos +
write_length] = self.random_bytes(write_length)
store.write(cow_version, pos,
image_2[pos:pos + write_length])
else:
image_2[pos:pos + write_length] = b'\0' * write_length
store.write(cow_version, pos, b'\0' * write_length)
with open(image_2_filename, 'wb') as f:
f.write(image_2)
for block_size in (512, 1024, 4096, 65536, 1861):
image = bytearray()
for pos in range(0, self.size, block_size):
if pos + block_size > self.size:
read_length = self.size - pos
else:
read_length = block_size
image = image + store.read(version, cow_version, pos,
read_length)
self.assertEqual(self.size, len(image))
for pos in range(0, self.size):
if image_2[pos] != image[pos]:
self.fail(
'Written image different at offset {} (block size {}).'
.format(pos, block_size))
break
store.fixate(cow_version)
benji_obj.deep_scrub(cow_version.uid,
'file:{}'.format(image_2_filename))
store.close(version)
benji_obj.close()
def test_create_cow_version(self):
benji_obj = self.benji_open()
store = BenjiStore(benji_obj)
version = store.find_versions(version_uid=self.version_uid)[0]
store.open(version)
cow_version = store.create_cow_version(version)
self.assertEqual(version.volume, cow_version.volume)
self.assertEqual(version.size, cow_version.size)
self.assertEqual(version.block_size, cow_version.block_size)
self.assertEqual(version.storage_id, cow_version.storage_id)
self.assertNotEqual(version.snapshot, cow_version.snapshot)
store.fixate(cow_version)
store.close(version)
benji_obj.close()