[INFO] Reactor Summary:
[INFO] 
[INFO] ix-checkit-dc ..................................... SUCCESS [0.003s]
[INFO] ix-checkit-contract ............................... SUCCESS [1.642s]
[INFO] ix-checkit-frontend: jquery, spring mvc ........... SUCCESS [2.345s]
[INFO] ix-checkit-backend: spring data rest, psql/h2 ..... SUCCESS [6.165s]
[INFO] ix-checkit-test: selenium IT ...................... SUCCESS [19.118s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD SUCCESS

The road to hell is paved with good intentions

Motivation

• During TDD there is a risk to break contracts between different components represented with war files
• It is useful to add a separate test project to run lightweight multi war integration tests to check the whole application integrity. These tests should be executed during common checkin build process as a part of continuous integration

Example application includes

• Backend war project, implemented with spring data rest. It has its own TDD tests implemented with mockMvc. There is no need in container, just mockMvc, to test the rest-services representing db entities. Test db is H2
• Front-end war project, implemented with spring MVC, and jquery. It has its own TDD tests implemented with Mockito.
• Selenium test project. Integration tests use jetty to deploy front-end and to test jsp pages. There is only one instance of jetty is used to deploy front-end. Backend mockMvc is used to test backend and to provide data for front-end. MockMvc instance is created in the context of the test itself and then it is passed to front-end, deployed in jetty context, through the dedicated static field of the front-end test (fake) service. So the Selenium test project is lightweight and can be run during the build process.
• Spring annotation configuration.

Test example

@RunWith(SpringJUnit4ClassRunner.class)

@ContextConfiguration(classes = { BEAppConfigurationDev.class,
 BEWebConfigurationDev.class })

@ActiveProfiles("dev")

@Transactional

@WebAppConfiguration

public class CheckItSeleniumIT { 

protected MockMvc backEndMockMvc;

@Autowired
  private WebApplicationContext backEndWebApplicationContext;

@Autowired
  private ItemService itemService;

@Before 
  public void setUp() throws Exception, BEError { 
    prepareSeleniumDriver();  check next pic. for details 
    createBackEndMockMvcAndPassItToJettyContext();
    prepareAndStartJetty();
  }

@Test
  public void testCheckItGoToEditPage() throws Exception {
    load_checkIt_homePage();
    when_double_click_on_first_row_of_itemGrid_Then_go_to_edit_page();
    when_an_option_entered_Then_it_is_in_the_option_grid();
  }

  private void load_checkIt_homePage() {
    seleniumDriver.get(seleniumBaseUrl + "/items");
  }

  private void
when_double_click_on_first_row_of_itemGrid_Then_go_to_edit_page() {
    WebElement row = (new WebDriverWait(seleniumDriver, 10))
        .until(ExpectedConditions.presenceOfElementLocated(
            By.cssSelector("table[id='list'] tr[id='1']")));
    Actions builder = new Actions(seleniumDriver);
    Action doubleClick = builder.moveToElement(row).doubleClick().build();
    doubleClick.perform();
  }

  private void
when_an_option_entered_Then_it_is_in_the_option_grid() {
    seleniumDriver.findElement(By.id("itemTextInput222")).clear();
    seleniumDriver.findElement(By.id("itemTextInput222"))
    .sendKeys("aaabbbccc");
    seleniumDriver.findElement(By.name("itemOption.itemComments"))
    .clear();
    seleniumDriver.findElement(By.name("itemOption.itemComments"))
    .sendKeys("dddeeefff");
    seleniumDriver.findElement(By.cssSelector(
    "#addOption > div.btBox > button[type=\"submit\"]")).click();
    seleniumDriver.findElement(By.cssSelector("span[title=\"dddeeefff\"]"))
    .click();
    WebElement itemText = (new WebDriverWait(seleniumDriver, 10))
        .until(ExpectedConditions.presenceOfElementLocated(
            By.cssSelector("span[title=\"dddeeefff\"]")));
    
    assertEquals("aaabbbccc",itemText.getText());
  }

setUp details

  private void prepareSeleniumDriver() {
    seleniumDriver = new ChromeDriver();
  }

  private void createBackEndMockMvcAndPassItToJettyContext() {
    backEndMockMvc = webAppContextSetup(backEndWebApplicationContext)
.build();
    itemService.setMockMvc(backEndMockMvc);
  }

  private void prepareAndStartJetty() throws Exception {
    createJetty();
    initJettyServerConnector();
    createJettyContextAndStart();
  }

  private void createJetty() {
    jetty = new Server(8080);
    jetty.setStopAtShutdown(true);
  }

  private void initJettyServerConnector() {
    ServerConnector scc = new ServerConnector(jetty);
    scc.setPort(8080);
    jetty.setConnectors(new Connector[] { scc });
  }

  private void createJettyContextAndStart() throws Exception {
    WebAppContext context = createAndConfigureJettyContext();
    jetty.setHandler(context);
    jetty.start();
  }

  private WebAppContext createAndConfigureJettyContext() {
    WebAppContext context = createJettyContext();
    configureJettyContextWithFrontEndInitializer(context);
    return context;
  }

  private WebAppContext createJettyContext() {
    WebAppContext context = new WebAppContext();
    context.setServer(jetty);
    context.setResourceBase(
"target/war/work/ru.ix.item.ui/ix-checkit-frontend");
    context.setContextPath("/ix-checkit-frontend");
    return context;
  }

  private void
configureJettyContextWithFrontEndInitializer(WebAppContext context) {
    context.setConfigurations(new Configuration[]{
            new WebXmlConfiguration(),
            new AnnotationConfiguration() {
              @Override
              public void preConfigure(WebAppContext context) throws
 Exception {
                  final ClassInheritanceMap map = new ClassInheritanceMap();
                  final ConcurrentHashSet set = new ConcurrentHashSet<>();
                  set.add(FEWebAppInitializerDev.class.getName());
                  map.put(WebApplicationInitializer.class.getName(), set);
                  context.setAttribute(CLASS_INHERITANCE_MAP, map);
                  _classInheritanceHandler = new ClassInheritanceHandler(
map);
              }
              
            }
    });
  }

Summary

Once upon a time I participated in some interesting project. There was a lot of war based components. There was a dedicated testing team. There was a lot of tests, all war component interactions had test-automation stuff, but one external link with CRM component. This link, as it was found after tdd had been completed, was the most important.