The JUnit Testing Framework has been removed from this software distribution. Please download and install JUnit version 3.8.1 before building cas-sample-extensions using Ant. To download JUnit, see http://sourceforge.net/projects/junit/files/junit/3.8.1/junit3.8.1.zip/download. Once you download JUnit, extract the JAR, and place it in cas-extensions\lib\test directory.