Changing your application's configuration for testing

Your application may uses Spring beans to, say, access an LDAP server. But when unit testing your pages, it is not needed and should be disabled. To do that, you can provide an additional Spring context XML file to override those beans. So, create an context-test.xml file in the root of the classpath:

<beans ...>
        <!-- Disable the LDAP by making it a simple String -->
        <bean id="ldapServer" class="java.lang.String"/>
        ...
</beans>

How to tell Spring to load this context-test.xml file in addition to the normal context.xml file? In principle, you need to contextConfigLocation parameter in web.xml:

<web-app ...>
        ...
        <context-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:/context.xml classpath:/context-test.xml</param-value>
        </context-param>
</web-app>

However, you definitely shouldn't modify web.xml as it is to be used in production. The idea is to create an overriding web.xml file. So, create a web-test.xml file in src/test/resources: 

<web-app ...>
        <context-param>
                <param-name>contextConfigLocation</param-name>
                <param-value>classpath:/context.xml classpath:/context-test.xml</param-value>
        </context-param>
</web-app>

To tell Jetty to apply this overriding web.xml file (web-test.xml) when launching your web application, create a class to wrap around the WebPageTestContext class. This class will specify the overriding web.xml file:

public class TestFixture {
        @BeforeSuite
        public void setUp() throws Exception {
                // configuration for wpt
                Configuration cfg = new Configuration();
                // tell wpt to provide an overriding web.xml to Jetty
                cfg.setOverrideWebXml("web-test.xml");
                // go ahead to launch Jetty and Selenium
                WebPageTestContext.beforePageTests(cfg); 
        }
        @AfterSuite
        public void tearDown() throws Exception {
                // shutdown Jetty and Selenium
                WebPageTestContext.afterPageTests();
        }
}

In the testng.xml file, run this TestFixture instead of the WebPageTestContext:

<suite name="wicket-page-test-sample">
        <test verbose="2" name="tests" annotations="JDK">
                <packages>
                        <package name="..."></package>
                </packages>
                <classes>
                        <class name="com.foo.TextFixture"></class>
                </classes>
        </test>
</suite>