how to do servlet unit testing

hi guys please help to me

Here is a GEMS Session where they cover JUNIT Testing - From Unit Testing to Integration Test of an AEM Application

A COMMUNITY ARTICLE TO HELP YOU:- http://keysandstrokes.info/aem-apache-sling-testing/

Also, some reference post wcm.io Testing | Testing

i reffered these things,but i din't get anything, this is 1st time to doing unittesing for servlet in aem., can u write servlet unittesting testcases  how to write , how to get resources ,how to json data equals

smacdonald2008​tim-schwalbe​Jörg Hoh​inactiveforumnotifier​Amy_Wong​mghalpin​

Have you looked at the default test package when you generate a maven archetype 12/13 project.

You can use JUNIT code to test application logic here. For example - here a model class.  WHen you build the maven project - you can see the Tests run and the results.

hi bro..i written like this

@RunWith(MockitoJUnitRunner.class)

public class ChildListTest {

@InjectMocks

private ChildList childlist;

@Mock

private SlingHttpServletRequest request;

@Mock

private SlingHttpServletResponse response;

@Mock

Resource resource;

Logger LOGGER;

@Mock

Node nodes;

@Mock

private ResourceResolverFactory resourceResolverFactory;

@Rule

public final AemContext context = new AemContext();

@Before

public void setup() {

//childlist=new ChildList();

MockitoAnnotations.initMocks(this);

}

@Test

public void testDoGet() throws ServletException, IOException, RepositoryException, JSONException

{

/*//childlist.doGet(context.request(),context.response());

resource = context.resourceResolver().getResource("/content");

ResourceResolver resolver = request.getResourceResolver();

resource = resolver.getResource(request.getRequestPathInfo().getResourcePath());

nodes=resource.adaptTo(Node.class);

NodeIterator it=nodes.getNodes();

}

}

i written testing in eclipse  maven archetype10, but how get request from servlet,, how to test servlet class and how link with test class and servlet class,and these servlet class how can i get response without running ...

package com.aem.community.core.servlets;

import java.io.IOException;

import javax.jcr.Node;

import javax.jcr.NodeIterator;

import javax.jcr.RepositoryException;

import javax.servlet.ServletException;

import org.apache.felix.scr.annotations.Service;

import org.apache.felix.scr.annotations.sling.SlingServlet;

import org.apache.sling.api.SlingHttpServletRequest;

import org.apache.sling.api.SlingHttpServletResponse;

import org.apache.sling.api.resource.Resource;

import org.apache.sling.api.resource.ResourceResolver;

import org.apache.sling.api.servlets.SlingAllMethodsServlet;

import org.apache.sling.commons.json.JSONArray;

import org.apache.sling.commons.json.JSONException;

import org.apache.sling.commons.json.JSONObject;

import org.apache.sling.commons.json.jcr.JsonJcrNode;

import org.osgi.service.component.annotations.Component;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

@Component(enabled = true, immediate = true)

@Service(ChildList.class)

@SlingServlet(resourceTypes="sling/servlet/default",selectors="childlist",methods="GET",ex tensions="json",metatype=true)

public class ChildList extends SlingAllMethodsServlet {

protected final Logger loger = LoggerFactory.getLogger(ChildList.class);

private static final long serialVersionUID = 9176255033916949528L;

private JSONArray array;

@Override

public void doGet(final SlingHttpServletRequest request, final SlingHttpServletResponse response)

throws ServletException, IOException {

try{

ResourceResolver resolver = request.getResourceResolver();

Resource resource = resolver.getResource(request.getRequestPathInfo().getResourcePath());

Node node = null;

if (resource != null) {

node = resource.adaptTo(Node.class);

}

if (node == null){

throw new RepositoryException();

}

NodeIterator it = node.getNodes();

array = new JSONArray();

while (it.hasNext()) {

Node child = it.nextNode();

if (loger.isDebugEnabled()){

loger.debug("resource......."+child.getPath());

}

JSONObject obj = new JsonJcrNode(child);

array.put(obj);

response.setContentType("application/json");

response.getOutputStream().print(array.toString());

}

}

catch(RepositoryException e) {

throw new ServletException("404 HTTP ERROR Page Not Found", e);

}

catch(JSONException e)

{

loger.error("Could not formulate JSON response");

throw new ServletException("Error", e);

}

}

}

Try creating another class in the test package. Then use Java APIs to invoke the Servlet and use  assertTrue on the value the servlet returns.

Also - you do not need @Component and @Servlet when using @SlingServlet.

Invoke the Servlet using JAVA HTTP APIS -- something like:

@Test

    public void testinvokeServlet() throws Exception {

        // some very basic junit tests

        <PUT IN JAVA HTTP CODE TO CALL SERVLET>

        assertTrue(msg.length() > 0);

    }

ie --

//Create an HTTPClient object

        HttpClient client = new HttpClient();

        HttpMethod method = new GetMethod("http://localhost:4502/bin/mySearchServlet");

with that @Slingservlet ex:http://localhost:4502/content.childlist.json  whenever hit this url we can get jsonarray for node properties.,

actaul requirement ->This web service is mounted to the selector .childlist.json. Given any node path, it returns a JSONArray of the node's child node paths and properties.

so that's why i created servlet with selector.extension