def test_good_write_and_read(self):
# test a write that should succeed
blob_file = BlobFile(self.blob_dir, self.fake_content_hash,
self.fake_content_len)
self.assertFalse(blob_file.verified)
writer, finished_d = blob_file.open_for_writing(peer=1)
writer.write(self.fake_content)
writer.close()
out = yield finished_d
self.assertIsInstance(out, BlobFile)
self.assertTrue(out.verified)
self.assertEqual(self.fake_content_len, out.get_length())
# read from the instance used to write to, and verify content
f = blob_file.open_for_reading()
c = f.read()
self.assertEqual(c, self.fake_content)
self.assertFalse(out.is_downloading())
# read from newly declared instance, and verify content
del blob_file
blob_file = BlobFile(self.blob_dir, self.fake_content_hash,
self.fake_content_len)
self.assertTrue(blob_file.verified)
f = blob_file.open_for_reading()
self.assertEqual(1, blob_file.readers)
c = f.read()
self.assertEqual(c, self.fake_content)
# close reader
f.close()
self.assertEqual(0, blob_file.readers)
def test_too_much_write(self):
# writing too much data should result in failure
expected_length = 16
content = b'0' * 32
blob_hash = random_lbry_hash()
blob_file = BlobFile(self.blob_dir, blob_hash, expected_length)
writer, finished_d = blob_file.open_for_writing(peer=1)
writer.write(content)
out = yield self.assertFailure(finished_d, InvalidDataError)
def test_delete(self):
blob_file = BlobFile(self.blob_dir, self.fake_content_hash, self.fake_content_len)
writer, finished_d = blob_file.open_for_writing(peer=1)
writer.write(self.fake_content)
out = yield finished_d
out = yield blob_file.delete()
blob_file = BlobFile(self.blob_dir, self.fake_content_hash)
self.assertFalse(blob_file.verified)
def test_bad_hash(self):
# test a write that should fail because its content's hash
# does not equal the blob_hash
length = 64
content = b'0' * length
blob_hash = random_lbry_hash()
blob_file = BlobFile(self.blob_dir, blob_hash, length)
writer, finished_d = blob_file.open_for_writing(peer=1)
writer.write(content)
yield self.assertFailure(finished_d, InvalidDataError)
async def make_sd_blob(self):
sd_hash = self.calculate_sd_hash()
sd_data = self.as_json()
sd_blob = BlobFile(self.loop, self.blob_dir, sd_hash, len(sd_data))
if not sd_blob.get_is_verified():
writer = sd_blob.open_for_writing()
writer.write(sd_data)
await sd_blob.verified.wait()
await sd_blob.close()
return sd_blob
def test_multiple_writers(self):
# start first writer and write half way, and then start second writer and write everything
blob_hash = self.fake_content_hash
blob_file = BlobFile(self.blob_dir, blob_hash, self.fake_content_len)
writer_1, finished_d_1 = blob_file.open_for_writing(peer=1)
writer_1.write(self.fake_content[:self.fake_content_len // 2])
writer_2, finished_d_2 = blob_file.open_for_writing(peer=2)
writer_2.write(self.fake_content)
out_2 = yield finished_d_2
out_1 = yield self.assertFailure(finished_d_1, DownloadCanceledError)
self.assertIsInstance(out_2, BlobFile)
self.assertTrue(out_2.verified)
self.assertEqual(self.fake_content_len, out_2.get_length())
f = blob_file.open_for_reading()
c = f.read()
self.assertEqual(self.fake_content_len, len(c))
self.assertEqual(bytearray(c), self.fake_content)
def test_delete_fail(self):
# deletes should fail if being written to
blob_file = BlobFile(self.blob_dir, self.fake_content_hash,
self.fake_content_len)
writer, finished_d = blob_file.open_for_writing(peer=1)
yield self.assertFailure(blob_file.delete(), ValueError)
writer.write(self.fake_content)
writer.close()
# deletes should fail if being read and not closed
blob_file = BlobFile(self.blob_dir, self.fake_content_hash,
self.fake_content_len)
self.assertTrue(blob_file.verified)
f = blob_file.open_for_reading()
yield self.assertFailure(blob_file.delete(), ValueError)
def test_delete_fail(self):
# deletes should fail if being written to
blob_file = BlobFile(self.blob_dir, self.fake_content_hash, self.fake_content_len)
writer, finished_d = blob_file.open_for_writing(peer=1)
with self.assertRaises(ValueError):
blob_file.delete()
writer.write(self.fake_content)
writer.close()
# deletes should fail if being read and not closed
blob_file = BlobFile(self.blob_dir, self.fake_content_hash, self.fake_content_len)
self.assertTrue(blob_file.verified)
r = blob_file.open_for_reading() # must be set to variable otherwise it gets garbage collected
with self.assertRaises(ValueError):
blob_file.delete()
def test_multiple_writers_save_at_same_time(self):
blob_hash = self.fake_content_hash
blob_file = BlobFile(self.blob_dir, blob_hash, self.fake_content_len)
writer_1, finished_d_1 = blob_file.open_for_writing(peer=1)
writer_2, finished_d_2 = blob_file.open_for_writing(peer=2)
blob_file.save_verified_blob(writer_1)
# second write should fail to save
yield self.assertFailure(blob_file.save_verified_blob(writer_2), DownloadCanceledError)
# schedule a close, just to leave the reactor clean
finished_d_1.addBoth(lambda x:None)
finished_d_2.addBoth(lambda x:None)
self.addCleanup(writer_1.close)
self.addCleanup(writer_2.close)
def test_close_on_incomplete_write(self):
# write all but 1 byte of data,
blob_file = BlobFile(self.blob_dir, self.fake_content_hash, self.fake_content_len)
writer, finished_d = blob_file.open_for_writing(peer=1)
writer.write(self.fake_content[:self.fake_content_len-1])
writer.close()
yield self.assertFailure(finished_d, DownloadCanceledError)
# writes after close will throw a IOError exception
with self.assertRaises(IOError):
writer.write(self.fake_content)
# another call to close will do nothing
writer.close()
# file should not exist, since we did not finish write
blob_file_2 = BlobFile(self.blob_dir, self.fake_content_hash, self.fake_content_len)
out = blob_file_2.open_for_reading()
self.assertIsNone(out)