[junit] java. lang.ClassNotFoundException while running ant script

This error is usually caused by having problem with classpath

You could get this for example while running the script for javac, or junit test. Make sure to add the lib folders you need, and the classes folder into the classpath. e.g. I have a main project with a model project (with hibernate), and before compile the main project, I’ve already built a jar for the model project and put it under the lib folder of the main one. It’ll look something like the following. Note: don’t forget to include the hibernate.cfg.xml file into classpath if you are using hibernate.

  <property name="build.main.dir"    location="/project/mainProject" />
<property name="build.model.dir"    location="/project/modelProject" />

<property name="class"    location="/project/build/classes" />
<path id="junit.classpath">
        <pathelement location="${build.main.dir}/classes"/>
        <pathelement location="${build.model.dir}/classes"/>
        <fileset dir="${build.model.dir}/classes">
            <include name="**/*.xml"/>
<target  name="build">
<javac srcdir="${build.main.dir}/src" destdir="${classes}"   debug="on" >
 <include name="**/*.java"/>
<classpath refid="main.classpath" />
<javac srcdir="${build.main.dir}/test" destdir="${classes}"   debug="on" >
 <include name="**/*.java"/>
<classpath refid="main.classpath" />

For junit case, there’re more stuffs to pay attention to:

1) make sure you referenced to the junit libs, they are NOT included in the ant distribution, reference to this junit test manual from ant. Basically you can put junit.jar and ant-junit.jar under ant’s lib folder, or reference that two classes in your classpath variable.

2) remember to build the test classes as well, like the example above included the test folder. 

3) add the above test classes to the classpath.

4) if your junit testing include calls to database through hibernate, do not use the jdbc connection that’s setup in the sun application server, so in hibernate.cfg.xml it should be something like this

<property name="connection.url">jdbc:oracle:thin:@123.456.78:test</property>
<property name="connection.username">username</property>
<property name="connection.password">password</property>

instead of 
<property name="connection.datasource">jdbc/testProject</property>