@Before public void setUp() { server1Count =0; server2Count =0; ServerData data1 = new ServerData(8080,Arrays.asList(), Mockito.mock(ApplicationContext.class), "url1", () -> "app-context"); ServerData data2 = new ServerData(8081, Arrays.asList(), Mockito.mock(ApplicationContext.class), "url2", () -> "test-context"); serverApplication1 = new GrizzlyApplication(AllData.builder().serverData(data1).build()){ @Override public void run(CompletableFuture start,JaxRsServletConfigurer jaxRsConfigurer, CompletableFuture end) { server1Count++; start.complete(true); } }; serverApplication2 = new GrizzlyApplication(AllData.builder().serverData(data2).build()){ @Override public void run(CompletableFuture start,JaxRsServletConfigurer jaxRsConfigurer,CompletableFuture end) { server2Count++; start.complete(true); } }; serverRunner = new ServerRunner( (array) -> {registered = array; } , Arrays.asList(serverApplication1, serverApplication2), new CompletableFuture()); }