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java.lang.NullPointerException at org.apache.struts.util.MessageResources.getMessageResources(MessageResources.java:577) at org.apache.struts.action.ActionServlet.initInternal(ActionServlet.java:1329) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:464) at javax.servlet.GenericServlet.init(GenericServlet.java:256) at servletunit.struts.MockStrutsTestCase.getActionServlet(MockStrutsTestCase.java:303) at servletunit.struts.MockStrutsTestCase.actionPerform(MockStrutsTestCase.java:371) at examples.TestLoginAction.testSuccessfulLogin(TestLoginAction.java:37) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:324) at junit.framework.TestCase.runTest(TestCase.java:154) at junit.framework.TestCase.runBare(TestCase.java:127) at junit.framework.TestResult$1.protect(TestResult.java:106) at junit.framework.TestResult.runProtected(TestResult.java:124) at junit.framework.TestResult.run(TestResult.java:109) at junit.framework.TestCase.run(TestCase.java:118) at junit.framework.TestSuite.runTest(TestSuite.java:208) at junit.framework.TestSuite.run(TestSuite.java:203) at junit.textui.TestRunner.doRun(TestRunner.java:116) at junit.textui.TestRunner.doRun(TestRunner.java:109) at junit.textui.TestRunner.run(TestRunner.java:72) at junit.textui.TestRunner.run(TestRunner.java:57) at examples.TestLoginAction.main(TestLoginAction.java:58)