### Question:
Kleene extends ERE { @Override public ERE copy() { return new Kleene(children.get(0).copy()); } private  Kleene(ERE child); static ERE get(ERE child); @Override EREType getEREType(); @Override String toString(); @Override ERE copy(); @Override boolean containsEpsilon(); @Override ERE derive(Symbol s);  }### Answer:
@Test public void testCopy() { ERE copy = aStar.copy(); assertEquals(aStar, copy); }