@After
  public void tearDown() throws Exception {
    Configuration c = TEST_UTIL.getConfiguration();
    FileUtil.fullyDelete(new File(c.get("hadoop.tmp.dir")));
  }
Base set of tests and setup for input formats touching multiple tables.
hbase-mapreduce/src/test/java/org/apache/hadoop/hbase/mapreduce/MultiTableInputFormatTestBase.java