@@ -0,0 +1,433 @@
+package jfdi.test.logic.events;%0A%0Aimport jfdi.logic.events.UndoFailedEvent;%0Aimport org.junit.Test;%0A%0Aimport static org.junit.Assert.*;%0A%0A/**%0A * @author Xinan%0A */%0Apublic class UndoFailedEventTest %7B%0A%0A    @Test%0A    public void getError() throws Exception %7B%0A        UndoFailedEvent event = new UndoFailedEvent(UndoFailedEvent.Error.NONTHING_TO_UNDO);%0A        assertEquals(UndoFailedEvent.Error.NONTHING_TO_UNDO, event.getError());%0A    %7D%0A%0A%7D%0A

Add test for `UndoFailedEvent`