### Question:
MetricManager { public static Compass getCompass(String group, MetricName name) { IMetricManager manager = getIMetricManager(); return manager.getCompass(group, name); }  static Counter getCounter(String group, MetricName name); static BucketCounter getBucketCounters(String group, MetricName name); static Compass getCompass(String group, MetricName name); static void register(String group, MetricName name, Metric metric); @SuppressWarnings("unchecked") static IMetricManager getIMetricManager();  }### Answer:
@Test public void testNOPCompass() { Compass compass = MetricManager.getCompass("test", MetricName.build("test")); compass.record(10, "success"); Assertions.assertEquals(0, compass.getCountAndRtPerCategory().size()); Assertions.assertEquals(0, compass.getMethodCountPerCategory().size()); Assertions.assertEquals(0, compass.getMethodRtPerCategory().size()); }