### Question:
ProcessManager implements IOFogModule { public void instanceConfigUpdated() { docker.reInitDockerClient(); } private  ProcessManager(); @Override int getModuleIndex(); @Override String getModuleName(); static ProcessManager getInstance(); void update(); void deleteRemainingMicroservices(); void stopRunningMicroservices(boolean withCleanUp, String iofogUuid); void instanceConfigUpdated(); void start();  }### Answer:
@Test public void testInstanceConfigUpdated() { try { PowerMockito.doNothing().when(dockerUtil).reInitDockerClient(); initiateMockStart(); processManager.instanceConfigUpdated(); verify(dockerUtil).reInitDockerClient(); } catch (Exception e) { fail("This should not happen"); } }