### Question:
Tracker implements TrackerMBean { public void setIsTrackingDelayedMetrics() { isTrackingDelayedMetrics = true; log.info("[TRACKER] Tracking delayed metrics started"); } private  Tracker(); static Tracker getInstance(); synchronized void register(); void addTenant(String tenantId); void removeTenant(String tenantId); void removeAllTenants(); Set getTenants(); void addMetricName(String metricName); void removeMetricName(String metricName); void removeAllMetricNames(); Set<String> getMetricNames(); void setIsTrackingDelayedMetrics(); void resetIsTrackingDelayedMetrics(); boolean getIsTrackingDelayedMetrics(); boolean isTracking(String tenantId); boolean doesMessageContainMetricNames(String logmessage); void track(HttpRequest request); void trackResponse(HttpRequest request, FullHttpResponse response); void trackDelayedMetricsTenant(String tenantid, final List<Metric> delayedMetrics); void trackDelayedAggregatedMetricsTenant(String tenantId, long collectionTimeMs, long delayTimeMs, List<String> delayedMetricNames); static final String trackerName; }### Answer:
@Test public void testSetIsTrackingDelayedMetrics() { tracker.resetIsTrackingDelayedMetrics(); tracker.setIsTrackingDelayedMetrics(); Assert.assertTrue("isTrackingDelayedMetrics should be true from setIsTrackingDelayedMetrics", tracker.getIsTrackingDelayedMetrics()); }