### Question:
IntList { public IntList dereverse() { if (this.rest == null) { return this; } IntList tmp = this.rest; this.rest = null; while (tmp != null) { IntList tmp2 = new IntList(this.first, this.rest); this.first = tmp.first; this.rest = tmp2; tmp = tmp.rest; } return this; } IntList(int first0, IntList rest0);  IntList(); static void dSquareList(IntList L); static IntList squareListIterative(IntList L); static IntList squareListRecursive(IntList L); static IntList dcatenate(IntList A, IntList B); static IntList catenate(IntList A, IntList B); @Override int hashCode(); static IntList of(Integer... args); boolean equals(Object x); @Override /** Outputs the IntList as a String. You are not expected to read * or understand this method. */ String toString(); static IntList reverse(IntList A); IntList dereverse(); public int first; public IntList rest; }### Answer:
@Test(timeout = 1000) public void testDereverse() { IntList A = IntList.of(1, 2, 3); IntList Ap = IntList.of(1, 2, 3); IntList exp = IntList.of(3, 2, 1); IntList A2 = IntList.of(3, 4, 5, 6, 3); IntList exp2 = IntList.of(3, 6, 5, 4, 3); assertEquals(exp, A.dereverse()); assertNotEquals(Ap, A); assertEquals(exp2, A2.dereverse()); }