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 save_verified_blob(self, writer):
result = BlobFile.save_verified_blob(self, writer)
if not self.callback.called:
self.callback.callback(True)
return result