ToggleButton ClassCastException

[swkanwar]

I am facing a ClassCastException while writing GWT Uts for a class having ToggleButton. Can you please help me resolve this? I have looked at some of the threads here and they are not helping much.

Following is the exception:
com.google.gwtmockito.GwtMockitoTestRunner$FailedCastException: The test failed with a ClassCastException. This often indicates that you are using a library that invokes JavaScriptObject.cast() to convert an object from one type to another in a way that can't be mimicked in pure Java. There are a few ways to deal with this:

1. Inject the class that calls cast() into the class being tested so that you can replace it with a mock.
2. Annotate your test class with @WithClassesToStub and pass in the class that is causing problems.
3. If the class is part of GWT and not a third-party library, try reporting it on the issue tracker at https://github.com/google/gwtmockito/issues and it might be possible to insert a workaround.

at com.google.gwtmockito.GwtMockitoTestRunner$1.testFailure(GwtMockitoTestRunner.java:320)
at org.junit.runner.notification.RunNotifier$4.notifyListener(RunNotifier.java:139)
at org.junit.runner.notification.RunNotifier$SafeNotifier.run(RunNotifier.java:61)
at org.junit.runner.notification.RunNotifier.fireTestFailures(RunNotifier.java:134)
at org.junit.runner.notification.RunNotifier.fireTestFailure(RunNotifier.java:128)
at org.junit.internal.runners.model.EachTestNotifier.addFailure(EachTestNotifier.java:23)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:275)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
at com.google.gwtmockito.GwtMockitoTestRunner.run(GwtMockitoTestRunner.java:367)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)

Caused by: java.lang.ClassCastException: org.mockito.internal.creation.cglib.ClassImposterizer$ClassWithSuperclassToWorkAroundCglibBug$$EnhancerByMockitoWithCGLIB$$e6e043c5 cannot be cast to com.google.gwt.user.client.ui.ToggleButton
at com.sourcefire.client.content.widget.multitogglebuttongroup.MultiToggelGroupTest.testAreAllButtonsSelected(MultiToggelGroupTest.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
... 15 more