@Override
            public void run(Status status) {
                assertEquals("Fail to [GET_SEQUENCE], step must >= 0", status.getErrorMsg());
            }
Test method: {@link MemoryRawKVStore#getSequence(byte[], int, KVStoreClosure)}
jraft-rheakv/rheakv-core/src/test/java/com/alipay/sofa/jraft/rhea/storage/memorydb/MemoryKVStoreTest.java