@Test
public void testGetAmbariBlacklistFile() {

  Properties ambariProperties = new Properties();
  Configuration conf = new Configuration(ambariProperties);
  Assert.assertEquals(null, conf.getAmbariBlacklistFile());
  ambariProperties = new Properties();
  ambariProperties.setProperty(Configuration.PROPERTY_MASK_FILE.getKey(), "ambari-blacklist.properties");
  conf = new Configuration(ambariProperties);
  Assert.assertEquals("ambari-blacklist.properties", conf.getAmbariBlacklistFile());
}