void logResult(Logger LOG, List<String> rs) {
    StringBuilder sb = new StringBuilder();
    for(String s : rs) {
      sb.append(s).append('\n');
    }
    LOG.info(sb.toString());
  }
Will assert that actual files match expected.
@param expectedFiles - suffixes of expected Paths.  Must be the same length
@param rootPath - table or partition root where to start looking for actual files, recursively
ql/src/test/org/apache/hadoop/hive/ql/TxnCommandsBaseForTests.java