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ANT could not find class for <junit>

Edmund Yong
Ranch Hand

Joined: Nov 16, 2003
Posts: 164
I defined a <junit> task in my build.xml, then try to run ANT within Eclipse. But I got the following error.


Ant could not find the task or a class this task relies upon.

This is common and has a number of causes; the usual
solutions are to read the manual pages then download and
install needed JAR files, or fix the build file:
- You have misspelt 'junit'.
Fix: check your spelling.
- The task needs an external JAR file to execute
and this is not found at the right place in the classpath.
Fix: check the documentation for dependencies.
Fix: declare the task.
- The task is an Ant optional task and the JAR file and/or libraries
implementing the functionality were not found at the time you
yourself built your installation of Ant from the Ant sources.
Fix: Look in the ANT_HOME/lib for the 'ant-' JAR corresponding to the
task and make sure it contains more than merely a META-INF/MANIFEST.MF.
If all it contains is the manifest, then rebuild Ant with the needed
libraries present in ${ant.home}/lib/optional/ , or alternatively,
download a pre-built release version from apache.org
- The build file was written for a later version of Ant
Fix: upgrade to at least the latest release version of Ant
- The task is not an Ant core or optional task
and needs to be declared using <taskdef>.
- You are attempting to use a task defined using
<presetdef> or <macrodef> but have spelt wrong or not
defined it at the point of use

Remember that for JAR files to be visible to Ant tasks implemented
in ANT_HOME/lib, the files must be in the same directory or on the
classpath


My ant-junit.jar is inside the Eclipse ANT plugin lib folder:

C:\eclipse\plugins\org.apache.ant_1.6.5\lib\ant-junit.jar

I have put junit-4.5.jar inside this folder as well.

According to what is explained in this web site http://ant.apache.org/manual/OptionalTasks/junit.html, I can simply put both junit.jar and ant-junit.jar in ANT_HOME/lib.

How can I resolve this problem? Thanks.
Ilja Preuss
author
Sheriff

Joined: Jul 11, 2001
Posts: 14112
You need to add the jar file(s) to the Ant classpath in Eclipse: Window/Preferences/Ant/Runtime


The soul is dyed the color of its thoughts. Think only on those things that are in line with your principles and can bear the light of day. The content of your character is your choice. Day by day, what you do is who you become. Your integrity is your destiny - it is the light that guides your way. - Heraclitus
Edmund Yong
Ranch Hand

Joined: Nov 16, 2003
Posts: 164
Thanks Ilja, now it works.
 
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