@Test
public void testReportNullGauge() throws Exception {

	influxDbReporter.reportMetrics(
			metricNameMap(name("cpu_usage").type("user").tag("core", "1").build(), gauge(null)),
			metricNameMap(Counter.class),
			metricNameMap(Histogram.class),
			metricNameMap(Meter.class),
			metricNameMap(Timer.class));
	verify(httpClient).send(eq("POST"), eq("http://localhost:8086/write?precision=ms&db=stm"),
			eq(Collections.emptyList()));
}