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