@Test
  public void testIsOverlap() {
    assertTrue(MetaFixer.isOverlap(_BRI, new Pair<RegionInfo, RegionInfo>(ABRI, ACRI)));
    assertFalse(MetaFixer.isOverlap(_ARI, new Pair<RegionInfo, RegionInfo>(C_RI, D_RI)));
    assertTrue(MetaFixer.isOverlap(ADRI, new Pair<RegionInfo, RegionInfo>(CDRI, C_RI)));
    assertFalse(MetaFixer.isOverlap(_BRI, new Pair<RegionInfo, RegionInfo>(CDRI, C_RI)));
  }
Test small utility methods inside {@link MetaFixer}. For cluster tests see {@link TestMetaFixer}
hbase-server/src/test/java/org/apache/hadoop/hbase/master/janitor/TestMetaFixerNoCluster.java