private Path getBaseTestDirOnTestFS() throws IOException {
    FileSystem fs = getTestFileSystem();
    return new Path(fs.getWorkingDirectory(), "test-data");
  }
@return Where to write test data on the test filesystem; Returns working directory for the test
        filesystem by default
@see #setupDataTestDirOnTestFS()
@see #getTestFileSystem()
hbase-testing-util/src/main/java/org/apache/hadoop/hbase/HBaseTestingUtility.java