@Override
    public final void calculate() {

    }
@Test
    public void testCalculate() {
        function.accept(MeterEntity.newService("service-test", Layer.GENERAL), HTTP_CODE_COUNT_1);
        function.accept(MeterEntity.newService("service-test", Layer.GENERAL), HTTP_CODE_COUNT_2);
        function.calculate();

        assertThat(function.getValue()).isEqualTo(HTTP_CODE_COUNT_3);
    }