@Test
public void testCertRecordChanged() {

    assertFalse(zts.certRecordChanged(null, null));
    assertTrue(zts.certRecordChanged(null, ""));
    assertTrue(zts.certRecordChanged("", null));
    assertFalse(zts.certRecordChanged("", ""));
    assertFalse(zts.certRecordChanged("test1", "test1"));
    assertTrue(zts.certRecordChanged("test1", "test2"));
    assertTrue(zts.certRecordChanged("test1", ""));
    assertTrue(zts.certRecordChanged("", "test2"));
}