ServiceReference ref_cs = Utils.getServiceReferenceByName(context, CheckService.class.getName(), un);
assertNotNull("Check cs availability", ref_cs);
CheckService cs = (CheckService) context.getService(ref_cs);
assertTrue("Check invocation", cs.check());
// Stop the provider.
provider.stop();
assertNull("No FooService", Utils.getServiceReference(context, FooService.class.getName(), null));
ref_cs = Utils.getServiceReferenceByName(context, CheckService.class.getName(), un);