StrutsTestCase The /WEB-INF/web.xml was not found - testing

Question

I use StrutsTestCase2.4 under netbeans7.0 with struts1.3
When running testCase, it shows:
Error initializing action servlet
javax.servlet.UnavailableException: The /WEB-INF/web.xml was not found.
I've googled this problem and it is suggested to be solved by setContextDirectory(new File("../web"));:
protected void setUp() throws Exception
{
super.setUp();
setContextDirectory(new File("../web"));
}
But I am not quite sure what the location of new File() should be.
My File tree is
|───build
│ ├───test
│ │ └───classes
│ │ └───com
│ │ └───stolon
│ │ ├───common
│ │ ├───database
│ │ ├───helpers
│ │ └───struts
│ └───web
│ ├───META-INF
│ └───WEB-INF
│ ├───classes
│ │ └───com
│ │ └───stolon
│ │ ├───algorithm
│ │ ├───database
│ │ ├───helpers
│ │ ├───servlet
│ │ ├───structures
│ │ └───struts
│ └───lib
├───nbproject
│ └───private
├───src
│ ├───conf
│ └───java
│ └───com
│ └───stolon
│ ├───algorithm
│ ├───database
│ ├───helpers
│ ├───servlet
│ ├───structures
│ └───struts
├───test
│ └───com
│ └───stolon
│ ├───common
│ ├───database
│ ├───helpers
│ └───struts
└───web
├───META-INF
└───WEB-INF
My test file is under test-com-stolon-struts.

Answer 1

I just ran in to this. WEB-INF/web.xml (and probably struts-config.xml, etc.) must be on your classpath when the tests are running. Make sure netbeans is putting /build/web/ on the test classpath.
If you were using maven, you would add WEB-INF/*.xml as a test resource.
<testResources>
<testResource>
<directory>WEB-INF</directory>
<targetPath>/WEB-INF</targetPath>
<includes>
<include>*.xml</include>
</includes>
</testResource>
</testResources>

Answer 2

From the directory structure, it seems : setContextDirectory(new File("../../../../web"));

Answer 3

So, based on the tree above, the location of new File() should be "web":
protected void setUp() throws Exception {
super.setUp();
setContextDirectory(new File("web"));
}