Java(TM) Boutique - StrutsTestCase: The Tool for Struts Unit testing

Tutorials : StrutsTestCase: The Tool for Struts Unit testing :

The next test program

The way you organize JUnit programs is that you create many test-methods, each testing a specific feature. We'll therefore add a new method to test the "detail" action, which brings us from the List page to the Detail page:

public void testDetail() {
    setRequestPathInfo("/detail");
    addRequestParameter("index","1");
    actionPerform();
    verifyForward("detail");
    verifyNoActionErrors();
}

The detail action needs to carry a parameter holding the index for the DVD to be detailed. In the web application this is done with a hyperlink:

http://localhost:8080/dvdlib/detail.do?index=1

So you use the addRequestParameter method to add parameters to the request. The index value could as well come from an HTML form field. The Action class would not be able to tell the difference.

If we run this program we're once again surprised:

. . .
F
Time: 1,97
There was 1 failure:
1) testDetail(hansen.playground.TestStrutsAction)
junit.framework.AssertionFailed
Error: was expecting '/detail.jsp' but received '/error.jsp'
   at servletunit.struts.Common.verifyForwardPath(Common.java:313)
. . .
FAILURES!!!
Tests run: 2,  Failures: 1,  Errors: 0

Looking in the code for the DetailDVDAction class we can see there are two cases where we'll forward to error.jsp: either the index value is not given (and we didn't forget that) or the DVD collection stored in session scope by the list action is null. The answer to the failure above is that STC works like JUnit: each test method starts from scratch by calling the setUp method, and you can not pass data from one test method to another.

What we could do was to let the setUp method create the DVD collection and save it in session scope, but I'll use the simpler approach where we use one single test method. If the list action is called first, everything should be OK. Let's try that:

public void testActions() {
  setContextDirectory(new File(
    "d:\\apache\\jakarta-tomcat-4.1.12\\webapps\\dvdlib"));
  setRequestPathInfo("/list");
  actionPerform();
  verifyForward("list");
  verifyNoActionErrors();

  setRequestPathInfo("/detail");
  addRequestParameter("index","1");
  actionPerform();
  verifyForward("detail");
  verifyNoActionErrors();
}

Now the test shows no errors:

. . .
INFO: ActionServlet: Reading dvds.xml: 3 dvds read

Time: 2,74

OK (1 test)

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