Re: Imposteriser produces ClassCastException when JUnit tests are run with Ant.

> Hi All, just wasted a day on this.
>
> I am mocking Concrete classes using the standard  
> Imposteriser.INSTANCE.
>
> The tests run fine under the Eclipse IDE.
>
> However when the same tests are run using the Ant JUnit task they  
> fail with
> a ClassCastException.
>
> The condition required to reproduce this bug is to mock a concrete  
> class (or
> its subclass) more than
> once over several test classes. Typically the first use of the Mock  
> class
> succeeds, but subsequent
> Test classes using the same mocked concrete class fail. Commenting  
> out the
> first usage
> will allow the second usage (which failed) to succeed.
>
> Debugging into the code seems to show CGLIBed instances of the  
> expected
> class.
>
> The failure is in:
>
>    public <T> T imposterise(final Invokable mockObject, Class<T>
> mockedType, Class<?>... ancilliaryTypes) {        if
> (!mockedType.isInterface() && toStringMethodIsFinal(mockedType)) {
> throw new IllegalArgumentException(mockedType.getName() + " has a  
> final
> toString method");        }                try {
> setConstructorsAccessible(mockedType, true);            Class<?>  
> proxyClass
> = createProxyClass(mockedType, ancilliaryTypes);            return
> mockedType.cast(createProxy(proxyClass, mockObject));        }
> finally {            setConstructorsAccessible(mockedType,  
> false);        }
> }
>
>
> On this line:
>
>            return mockedType.cast(createProxy(proxyClass,  
> mockObject));
> I have converted my own classes to use interfaces and removed  
> imposteriser
> (using just interfaces with the imposteriser also fails).
> However I am now stuck because I am also mocking 3rd part classes.
> Any workarounds appreciated.
>
> P.S. I have upgraded from 2.5.1 to 2.6.o without improvement.
>