private Path createAndGetTestDir() throws IOException {
    final Path testDir = HBASE_TESTING_UTILITY.getDataTestDir();
    HBASE_TESTING_UTILITY.getTestFileSystem().mkdirs(testDir);
    return testDir;
  }
Test Utility to create test dir and return name
@return return name of created dir
@throws IOException throws IOException
hbase-server/src/test/java/org/apache/hadoop/hbase/io/hfile/bucket/TestBucketCache.java