### Question:
Reduction extends ArrayList<Token> { public void setValue(Variable value) { this.value = value; } Reduction();  Reduction(int size); void execute(); Production getParent(); void setParent(Production parent); Variable getValue(); void setValue(Variable value);  }### Answer:
@Test public void testSetValue() { Variable variable = new Variable("Hello"); Reduction reduction = new Reduction(); assertNull(reduction.getValue()); reduction.setValue(variable); assertEquals("wrong value", variable, reduction.getValue()); }