@Override
    public String eventName() {
        return "selector";
    }
@Test
    void eventName() {
        SelectorChangedEvent selectorChangedEvent
                = new SelectorChangedEvent(before, null, EventTypeEnum.SELECTOR_CREATE, "test-operator");

        String expectName = "selector";

        String actualName = selectorChangedEvent.eventName();

        assertEquals(expectName, actualName);
    }