EasyMock / Arrays.asList(…) with only one varagrs parameter











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We recently switched from Oracle JDK 8 to OpenJDK 11 and I've encountered a strange behavior in the following case:



final List<Interface> foo = Arrays.asList(EasyMock.mock(Interface.class))


I'm getting the following exception when run in a unit test via JUnit:



class com.sun.proxy.$Proxy225 cannot be cast to class [Lorg.example.Interface; (com.sun.proxy.$Proxy225 and [Lorg.example.Interface; are in unnamed module of loader 'app')



EasyMock version is the newest (4.0.1).



For sure I should have used Collections.singletonList(...) and this is also what compiles and runs or now since Java9!? List.of(...), but yeah.



I don't really get the problem, but I think it's related to EasyMock with Java 11.






java easymock







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    up vote
    1
    down vote

    favorite












    We recently switched from Oracle JDK 8 to OpenJDK 11 and I've encountered a strange behavior in the following case:



    final List<Interface> foo = Arrays.asList(EasyMock.mock(Interface.class))


    I'm getting the following exception when run in a unit test via JUnit:



    class com.sun.proxy.$Proxy225 cannot be cast to class [Lorg.example.Interface; (com.sun.proxy.$Proxy225 and [Lorg.example.Interface; are in unnamed module of loader 'app')



    EasyMock version is the newest (4.0.1).



    For sure I should have used Collections.singletonList(...) and this is also what compiles and runs or now since Java9!? List.of(...), but yeah.



    I don't really get the problem, but I think it's related to EasyMock with Java 11.






    java easymock







    share|improve this question
























      up vote
      1
      down vote

      favorite









      up vote
      1
      down vote

      favorite











      We recently switched from Oracle JDK 8 to OpenJDK 11 and I've encountered a strange behavior in the following case:



      final List<Interface> foo = Arrays.asList(EasyMock.mock(Interface.class))


      I'm getting the following exception when run in a unit test via JUnit:



      class com.sun.proxy.$Proxy225 cannot be cast to class [Lorg.example.Interface; (com.sun.proxy.$Proxy225 and [Lorg.example.Interface; are in unnamed module of loader 'app')



      EasyMock version is the newest (4.0.1).



      For sure I should have used Collections.singletonList(...) and this is also what compiles and runs or now since Java9!? List.of(...), but yeah.



      I don't really get the problem, but I think it's related to EasyMock with Java 11.






      java easymock







      share|improve this question













      We recently switched from Oracle JDK 8 to OpenJDK 11 and I've encountered a strange behavior in the following case:



      final List<Interface> foo = Arrays.asList(EasyMock.mock(Interface.class))


      I'm getting the following exception when run in a unit test via JUnit:



      class com.sun.proxy.$Proxy225 cannot be cast to class [Lorg.example.Interface; (com.sun.proxy.$Proxy225 and [Lorg.example.Interface; are in unnamed module of loader 'app')



      EasyMock version is the newest (4.0.1).



      For sure I should have used Collections.singletonList(...) and this is also what compiles and runs or now since Java9!? List.of(...), but yeah.



      I don't really get the problem, but I think it's related to EasyMock with Java 11.






      java easymock




      java easymock






      share|improve this question













      share|improve this question











      share|improve this question




      share|improve this question










      asked Nov 21 at 13:27









      Johannes

      98811434




      98811434
























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          This is a type inference issue. It's caused by the new way EasyMock does type inference. It helps tremendously in many cases but here is an example where it won't be able to cast to the right type.



          The solution is to use a type witness. This will work: List<Interface> foo = Arrays.asList(EasyMock.<Interface, Interface>mock(Interface.class));






          share|improve this answer





















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            active

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            active

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            active

            oldest

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            up vote
            1
            down vote



            accepted










            This is a type inference issue. It's caused by the new way EasyMock does type inference. It helps tremendously in many cases but here is an example where it won't be able to cast to the right type.



            The solution is to use a type witness. This will work: List<Interface> foo = Arrays.asList(EasyMock.<Interface, Interface>mock(Interface.class));






            share|improve this answer

























              up vote
              1
              down vote



              accepted










              This is a type inference issue. It's caused by the new way EasyMock does type inference. It helps tremendously in many cases but here is an example where it won't be able to cast to the right type.



              The solution is to use a type witness. This will work: List<Interface> foo = Arrays.asList(EasyMock.<Interface, Interface>mock(Interface.class));






              share|improve this answer























                up vote
                1
                down vote



                accepted







                up vote
                1
                down vote



                accepted






                This is a type inference issue. It's caused by the new way EasyMock does type inference. It helps tremendously in many cases but here is an example where it won't be able to cast to the right type.



                The solution is to use a type witness. This will work: List<Interface> foo = Arrays.asList(EasyMock.<Interface, Interface>mock(Interface.class));






                share|improve this answer












                This is a type inference issue. It's caused by the new way EasyMock does type inference. It helps tremendously in many cases but here is an example where it won't be able to cast to the right type.



                The solution is to use a type witness. This will work: List<Interface> foo = Arrays.asList(EasyMock.<Interface, Interface>mock(Interface.class));







                share|improve this answer












                share|improve this answer



                share|improve this answer










                answered 2 days ago









                Henri

                3,42411221




                3,42411221






























                     

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