:: from command line: go to ws/out/core/ run <code> java junit.textui.TestRunner nexj.core.AllTests</code> (getting error IOExcpetion) so we just ran one test file <code> java junit.textui.TestRunner nexj.core.util.MathUtilTest</code> (We did some changes to <code> core/test/nexj/core/util</code> to practice with it) Or we can run the ant target for test: <code> ant -f build_JUnitTest.xml test </code>