protected final void setupWALWriter() throws IOException {
    logPath = new Path(LOG_DIR, name.getMethodName());
    WRITER = WALFactory.createWALWriter(FS, logPath, UTIL.getConfiguration());
  }
Base class for testing serial replication.
hbase-server/src/test/java/org/apache/hadoop/hbase/replication/SerialReplicationTestBase.java