### Question:
EhDisjointFF extends GenericFilterFunction { @Override public boolean isDisjoint() { return true; }  @Override boolean isDisjoint(); @Override boolean isDisconnected();  }### Answer:
@Test public void testIsDisjoint() { EhDisjointFF instance = new EhDisjointFF(); boolean expResult = true; boolean result = instance.isDisjoint(); assertEquals(expResult, result); }