@Override
    public void put(MessageWriteSet messageSetToWrite) throws StoreException {
      operationReceived = RequestOrResponseType.PutRequest;
      messageWriteSetReceived = messageSetToWrite;
      throwExceptionIfRequired();
    }
Mocked {@link Store} that is intended to perform predefined behavior.
ambry-server/src/test/java/com/github/ambry/server/MockStorageManager.java