junit.framework.AssertionFailedError: Error running action.perform(): class java.lang.UnsupportedOperationException - getContext operation is not supported\!

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junit.framework.AssertionFailedError: Error running action.perform(): class java.lang.UnsupportedOperationException - getContext operation is not supported\!
at junit.framework.Assert.fail(Assert.java:51)
at servletunit.struts.MockStrutsTestCase.actionPerform(MockStrutsTestCase.java:340)
at com.adventnet.webclient.struts.action.test.TestSetBundleAction.testBundleName(TestSetBundleAction.java:33)
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:166)
at junit.framework.TestCase.runBare(TestCase.java:140)
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:131)
at junit.framework.TestSuite.runTest(TestSuite.java:173)
at junit.framework.TestSuite.run(TestSuite.java:168)
at org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:325)
at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.executeInVM(JUnitTask.java:804)
at org.apache.tools.ant.taskdefs.optional.junit.JUnitTask.execute(JUnitTask.java:551)
at org.apache.tools.ant.Task.perform(Task.java:317)
at org.apache.tools.ant.Target.execute(Target.java:309)
at org.apache.tools.ant.Target.performTasks(Target.java:334)
at org.apache.tools.ant.Project.executeTarget(Project.java:1306)
at org.apache.tools.ant.Project.executeTargets(Project.java:1250)
at org.apache.tools.ant.Main.runBuild(Main.java:610)
at org.apache.tools.ant.Main.start(Main.java:196)

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