@Override
    public Double getValue() {
        return getRatio().getValue();
    }
@Test
    public void handlesDivideByZeroIssues() {
        final RatioGauge divByZero = new RatioGauge() {
            @Override
            protected Ratio getRatio() {
                return Ratio.of(100, 0);
            }
        };

        assertThat(divByZero.getValue())
                .isNaN();
    }