### Question:
HorizontalRuleEvent extends DocumentBuilderEvent { @Override public boolean equals(Object obj) { if (obj == null) { return false; } if (obj == this) { return true; } if (!(obj instanceof HorizontalRuleEvent)) { return false; } return true; }  @Override void invoke(DocumentBuilder builder); @Override int hashCode(); @Override boolean equals(Object obj); @Override String toString();  }### Answer:
@Test public void equals() { assertEquality(new HorizontalRuleEvent(), new HorizontalRuleEvent()); }