  @Test
  public void testAddInt() {

    FixValue<Integer> op1 = new FixValue<Integer>("op1", FixType.intType, 3);
    FixValue<Integer> op2 = new FixValue<Integer>("op2", FixType.intType, 4);  
    assertEquals(Integer.valueOf(7), fixValueOperations.add.apply(op1, op2).getValue());
  }