Question about testing custom tags

Folks,

I am using Cactus to test custom tags. This is how my setup of Cactus is:

cactus.properties
 
cactus.contextURL = http://localhost:9081/contextRoot
 
There are no other entries in this file. I am using the default 
ServletRedirector and ServletTestRunner. I am now trying to test custom 
tags that extend JspTestCase. Accordingly, I added the entries for the 
JspRedirector to the web.xml file. The entries are as follows:
 
web.xml
 
<servlet>
        <servlet-name>JspRedirector</servlet-name>
        <servlet-class>/jspRedirector.jsp</servlet-class>
</servlet>
<servlet-mapping>
        <servlet-name>JspRedirector</servlet-name>
        <url-pattern>/JspRedirector</url-pattern>
</servlet-mapping>
 
The jspRedirector.jsp is located in the WEB-INF directory of the web 
application. 
 
On trying to run the test by invoking the following url, I get the error 
message below:
 
Error 500: Missing service name parameter [Cactus_Service] in HTTP 
request. Received query string is [null].
 
The url used is:
 
URL=http://localhost:9081/contextRoot/jspRedirector.jsp
 
Any pointers on what I am doing incorrectly.
 
Thanks,
Samarth
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