Error creating object MockHttpServletResponse for unit testing

Question

I was trying to write unit test for Servlet using sprint-test using mock object

my maven dependency is:

<dependency>
   <groupId>org.springframework</groupId>
   <artifactId>spring-test</artifactId>
   <version>4.0.3.RELEASE</version>
</dependency>

I want to test just java servlet like below following book PRACTICAL TDD AND ACCEPTANCE TDD FOR JAVA DEVELOPER :

package sample;

import java.io.IOException;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class LoginServlet extends HttpServlet {
    private boolean isValid;

    /**
     * 
     */
    private static final long serialVersionUID = 2473252741884321641L;

    @Override
    public void init() throws ServletException {
        super.init();

    }

    @Override
    public void doPost(HttpServletRequest req, HttpServletResponse resp)
            throws IOException {
        String user = req.getParameter("j_username");
        String pass = req.getParameter("j_password");
        if (isValidLogin(user, pass)) {
            resp.sendRedirect("/frontpage");
            req.getSession().setAttribute("username", user);
        } else {
            resp.sendRedirect("/invalidlogin");
        }

    }

    private boolean isValidLogin(String user, String pass) {
        return isValid;
    }

    public void setValid(boolean isValid) {
        this.isValid = isValid;
    }

}

My code is:

    package sample;
    import static org.junit.Assert.assertEquals;
    import org.junit.Test;
    import org.springframework.mock.web.MockHttpServletRequest;
    import org.springframework.mock.web.MockHttpServletResponse;

    public class SprintTestProb {

    @Test
    public void wrongPasswordShouldRedirectToErrorPage() throws Exception {
        MockHttpServletRequest request = new MockHttpServletRequest();
        MockHttpServletResponse response = new MockHttpServletResponse();
        request.addParameter("j_username", "gyanu");
        request.addParameter("j_password", "wrongpassword");
        LoginServlet login = new LoginServlet();
        login.setValid(false);
        login.doPost(request, response);
        assertEquals("/invalidlogin", response.getRedirectedUrl());
    }

}

I got error on line MockHttpServletResponse response = new MockHttpServletResponse(); as follows:

java.lang.ExceptionInInitializerError
    at org.springframework.mock.web.MockHttpServletResponse.<init>(MockHttpServletResponse.java:76)
    at sample.SprintTestProb.wrongPasswordShouldRedirectToErrorPage(SprintTestProb.java:14)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: java.util.MissingResourceException: Can't find bundle for base name javax.servlet.LocalStrings, locale en_US
    at java.util.ResourceBundle.throwMissingResourceException(ResourceBundle.java:1499)
    at java.util.ResourceBundle.getBundleImpl(ResourceBundle.java:1322)
    at java.util.ResourceBundle.getBundle(ResourceBundle.java:721)
    at javax.servlet.ServletOutputStream.<clinit>(ServletOutputStream.java:87)
    ... 25 more

Tested the code, just like you provided it above, but it works for me, no errors. — Andrei Stefan
– Andrei Stefan, Commented Apr 30, 2014 at 11:35
In pom: junit 4.7, javax.servlet-api 3.0.1, spring-test 4.0.3, spring-context 4.0.3 — Andrei Stefan
– Andrei Stefan, Commented Apr 30, 2014 at 12:27
my mistake was using javaee-api solved with using javax.servlet-api. Thank you very much. — gyanu
– gyanu, Commented Apr 30, 2014 at 13:30

gyanu · Accepted Answer · 2014-05-06 08:39:38Z

10

I need to replace dependency for javaee-api with javax.selvlet-api as below:

<dependency>
  <groupId>javax.servlet</groupId>
  <artifactId>javax.servlet-api</artifactId>
  <version>3.1.0</version>
</dependency>

answered May 6, 2014 at 8:39

gyanu

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3 Comments

josh-cain Over a year ago

So I had the same problem, except I had the j2ee-api 7 listed as a dependency (provided). I thought this included the servlet api, but as soon as I added the servlet api as above + provided it resolved my issue. Why on earth did that work?

gyanu Over a year ago

seems like j2ee-api contains only j2ee-api than can be used for compile. It doesn't contain method bodies so it is not usable for run or deployment. for more mkyong.com/maven/how-to-download-j2ee-api-javaee-jar-from-maven

josh-cain Over a year ago

Right - and it was my understanding that the servlet-api was simply a sub-set of the larger j2ee-api. Are you saying that this is not the case?

Shiraaz.M · Accepted Answer · 2014-04-30 11:12:56Z

1

According to the Spring Framework Reference for Testing you should be using annotations to autowire your mocks. The example in the spring reference:

`

    @WebAppConfiguration
    @ContextConfiguration
    public class WacTests {

    @Autowired WebApplicationContext wac; // cached

    @Autowired MockServletContext servletContext; // cached

    @Autowired MockHttpSession session;

    @Autowired MockHttpServletRequest request;

    @Autowired MockHttpServletResponse response;

    @Autowired ServletWebRequest webRequest;

    //...
}

`

A different example (without annotations) can be found here

answered Apr 30, 2014 at 11:12

Shiraaz.M

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Comments

gyanu · Accepted Answer · 2014-09-16 12:38:40Z

0

I had a similar issue and solved it by adding this dependency to my pom and there is no need to change your javaee-api to javax.servlet

<dependency>
 <groupId>org.mortbay.jetty</groupId>
 <artifactId>servlet-api-2.5</artifactId>
 <version>6.1.11</version>
</dependency>

edited Sep 16, 2014 at 12:38

gyanu

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answered Sep 16, 2014 at 11:48

gabi

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1 Comment

gyanu Over a year ago

In java we can find many library implementation according to server we work on and in your case you are using jetty implementation. You can also check for glassfish, tomcat and also more.

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