eclipse - Tycho tests failing due to java.lang.NoClassDefFoundError: junit/framework/AssertionFailedError -
i flummoxed , flabbergasted one. in understanding, should work, don't know why. i have tycho build runs few tests in eclipse worksbench. however, of tests fail kind of exception: java.lang.noclassdeffounderror: junit/framework/assertionfailederror @ org.grails.ide.eclipse.commands.test.abstractcommandtest.teardown(abstractcommandtest.java:112) @ junit.framework.testcase.runbare(testcase.java:140) @ junit.framework.testresult$1.protect(testresult.java:110) @ junit.framework.testresult.runprotected(testresult.java:128) @ junit.framework.testresult.run(testresult.java:113) @ junit.framework.testcase.run(testcase.java:124) @ junit.framework.testsuite.runtest(testsuite.java:243) @ junit.framework.testsuite.run(testsuite.java:238) @ junit.framework.testsuite.runtest(testsuite.java:243) @ junit.framework.testsuite.run(testsuite.java:238) @ org.springsource.ide.eclipse.commons.tests.util.managedtestsuite.run(managedtestsuite.java:231) @ org.junit.internal.runners.junit38classrunner.run...