Re: [Rmock-developer] ClassCastException: Solved.

[Joakim O. <joa...@ag...>]

If you hadn't mentioned coverlipse and I hadn't tried coverlipse
myself I would never have thought about it. I'm happy it works now!

/J

On 1/30/07, Michael Nyika <ny...@ya...> wrote:
> Hey what do you know? It works! It performed just as you said. I uninstalled
> CoverClipse and installed EclEmma (havent used that just yet). I would never
> have guessed the CoverClipse was the problem. Thank you very much for
> helping out.
>
> I hope someone else can benefit from this too. Many thanks again.
>
> Joakim Ohlrogge <joa...@ag...> wrote:
> Oh come to think of it I actuially never got coverlipse to work with
> rMock. I think it has to do with some classloading issues with CGLIB
> and coverlipse (CGLIB uses a classloader to generate classes
> dynamically and I suspect coverlipse uses a classloader to instrument
> the code to be run). I started using eclemma instead:
> http://www.mountainminds.com/products/eclemma
> That works like charm. Try to run the tests without coverlipse and see
> if that helps.
>
> Let me know how it goes
>
> /Joakim Ohrogge
>
> On 1/30/07, Michael Nyika wrote:
> > Ok, i understand, it is a little hard to tell:
> >
> > Here's the StackTrace:
> > ====================
> > keepalive false
> > RemoteTestRunner: trying to connect:3363
> > start send tree...done send tree - time(ms): 32
> > java.lang.ClassCastException
> > at
> >
> com.esri.sln.ss.core.ctx.ApplicationContext$$EnhancerByCGLIB$$1e4df572.getEntityManager()
> > at
> >
> test.gov.ct.event.servlet.rs.SelectAttributeByPointRSServletTest.testGetAttributeByPointWithThemeIdStringNotValid(SelectAttributeByPointRSServletTest.java:41)
> > 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
> >
> com.agical.rmock.extension.junit.RMockTestCase.runBare(RMockTestCase.java:102)
> > 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
> >
> org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:128)
> > at
> >
> org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
> > at
> >
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
> > at
> >
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
> > at
> >
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
> > at
> >
> org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
> > at
> >
> de.uka.ipd.coverage.plugin.remote.CoverageRemoteTestRunner.run(CoverageRemoteTestRunner.java:71)
> > at
> >
> de.uka.ipd.coverage.plugin.remote.CoverageRemoteTestRunner.(CoverageRemoteTestRunner.java:37)
> > at
> >
> sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
> > Method)
> > at
> >
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
> > at
> >
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
> > at
> >
> java.lang.reflect.Constructor.newInstance(Constructor.java:274)
> > at
> >
> de.uka.ipd.coverage.plugin.remote.CoverageRemoteTestRunner.main(CoverageRemoteTestRunner.java:48)
> >
> > ====================
> >
> > **Dont worry about the RemoteTestRunner bit, that's output from
> CoverClipse
> > (code coverage plugin for eclipse)
> >
> > I do not have the source code for the methods in the ApplicationContext
> > class. It comes from a proprietary API.
> >
> > If the stacktrace isn't enough, would you at least suspect there are other
> > calls of a non-trivial nature inside the getEntityManager() method? Do you
> > think the results would be any different if I didn't mock out the
> interface,
> > but created my own EntityManager mock object with fake methods and tried
> > that out?
> >
> > See, RMock is great, but if I could just get past this, i'd be able to
> mock
> > and test anything. Wish it could be so.
> >
> > Joakim Ohlrogge wrote:
> > I would need to see the complete exception with stacktrace and the
> > definition of the getEntityManager method to be able to help out
> > further. I can't see anything obviously wrong with what you're doing
> > with the information I have right now. I'm not aware of any bugs in
> > this area that would cause this...
> >
> > On 1/30/07, Michael Nyika wrote:
> > > Thanks for replying Joakim: It seems I still have a problem, the exact
> > same
> > > error pops up (ClassCastException):
> > >
> > > Here's my exact setup in code:
> > > =======================
> > > applicationContext =
> > (ApplicationContext)intercept(ApplicationContext.class,
> > > "applicationContext");
> > >
> > > applicationContext.getEntityManager();
> > > EntityManager manager = (EntityManager)mock(EntityManager.class,
> > > "mockManager");
> > >
> > > modify().returnValue(manager);
> > > startVerification();
> > >
> > >
> > > And the Error is still:
> > > ==================
> > > java.lang.ClassCastException
> > > at
> > >
> >
> com.esri.sln.ss.core.ctx.ApplicationContext$$EnhancerByCGLIB$$1e4df572.getEntityManager()
> > >
> > > Also note that EntityManager is an Interface, but that's no problem with
> > the
> > > way i've mocked it out. There's a ton of abstract methods i'd rather not
> > > quickly implement from the interface, so i'd prefer to mock it out......
> > >
> > >
> > >
> > >
> > > Joakim Ohlrogge wrote:
> > > It took me a little while to spot the problem:
> > >
> > >
> > > Here you are saying:
> > >
> > > >
> > > > ctx.getEntityManager();
> > >
> > > * expect that ctx.getEntityManager() is called
> > > - once
> > > - return null (or if EntityManager is an interface, a mocked entity
> > manager)
> > >
> > > > modify().returnValue(is.instanceOf(EntityManager.class));
> > >
> > > Here you are changing the recorded expectation to return an instance
> > > of InstanceOfConstraint primed with EntityManager.class. This gives a
> > > class cast exception since what you should be returning is an instance
> > > of an EntityManager.
> > >
> > > What you want to do here to fix it is:
> > >
> > > EntityManager entityManager = new EntityManager(); // or a mock if you
> > > prefer
> > > modify().returnValue(entityManager);
> > >
> > > I hope this helps some.
> > > Regards Joakim Ohlrogge
> > >
> > >
> > >
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>
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