### Question:
SwitchTrackingService implements IOFSwitchListener, IService { @Override @NewCorrelationContextRequired public void switchRemoved(final DatapathId switchId) { dashboardLogger.onSwitchEvent(switchId, SwitchChangeType.REMOVED); switchManager.deactivate(switchId); switchDiscovery(switchId, SwitchChangeType.REMOVED); }  void dumpAllSwitches(); void completeSwitchActivation(DatapathId dpId); @Override @NewCorrelationContextRequired void switchAdded(final DatapathId switchId); @Override @NewCorrelationContextRequired void switchRemoved(final DatapathId switchId); @Override @NewCorrelationContextRequired void switchActivated(final DatapathId switchId); @Override @NewCorrelationContextRequired void switchDeactivated(final DatapathId switchId); @Override @NewCorrelationContextRequired void switchChanged(final DatapathId switchId); @Override @NewCorrelationContextRequired void switchPortChanged(final DatapathId switchId, final OFPortDesc portDesc, final PortChangeType type); @Override void setup(FloodlightModuleContext context);  }### Answer:
@Test public void switchRemoved() { Capture<Message> producedMessage = prepareSwitchEventCommon(dpId); switchManager.deactivate(eq(dpId)); replayAll(); service.switchRemoved(dpId); verifySwitchEvent(SwitchChangeType.REMOVED, null, producedMessage); }