Cannot subclass final class

[mike]

Hi,

We try to run a testcase using powermockito and testng but it fails with:

java.lang.IllegalArgumentException: Cannot subclass final class class <companypackage>.ResourceElement

We have the following versions of powermock ( mockito):


      <dependency>
      <groupId>org.mockito</groupId>
      <artifactId>mockito-all</artifactId>
      <version>1.9.5</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.powermock</groupId>
      <artifactId>powermock-api-mockito</artifactId>
      <version>1.5</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.powermock</groupId>
      <artifactId>powermock-module-testng</artifactId>
      <version>1.5</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.testng</groupId>
      <artifactId>testng</artifactId>
      <version>6.8</version>
      <scope>test</scope>
    </dependency>


And we try the following testcase:


import static org.fest.assertions.api.Assertions.assertThat;
import static org.powermock.api.mockito.PowerMockito.when;

import org.powermock.core.classloader.annotations.PrepareForTest;
import org.powermock.modules.testng.PowerMockTestCase;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Test;

import <comapanypackage>.ResourceElement;


@PrepareForTest(MyFinalClass.class)
public class ResourceTest extends PowerMockTestCase {

    private static ResourceElement xmlMock;

  

    @BeforeMethod
    public static void beforeMethod() throws Exception {

        //xmlMock = mock(ResourceElement.class);
      
      
    }

  
The ResourceElement is a final class:

looks like ( not all code)

public final class ResourceElement {

ResourceElement(Resource resource, TypeMapper mapper) {
        this.resource = resource;
        this.mapper = mapper;
    }

}

Resource is an abstract class and TypeMapper is a final ( not public but default package) class.

We managed to run this if we use Junit but not with TestNG.
Any ideas?

br,

//mike

  

[mike]

I tried to use instead of extending PowerMockTestCase  but I cannot find PowerMockRunner in my classpath (Eclipse).

br,

//mike

@RunWith(PowerMockRunner.class);

[mike]

I used


and found PowerMockRunner.class but still the same problem.

java.lang.

IllegalArgumentException: Cannot subclass final class class <companypackage>.ResourceElement

br,

//mike

[mike]

I run the testcase with VM arg:-XX:-UseSplitVerifier otherwise I get:

nconsistent stackmap frames at branch target 38 in method ....

//mike

[Johan Haleby]

You don't have a RunWith annotation in TestNG so you cannot use that. If you use TestNG it's better if you extend from PowerMockTestCase (it seem to resolve some issues). Perhaps the problem can be that you create the mock in the @beforeMethod, what happens if you move it in to a test method? Try also making the method non-static and see if that makes any difference.

/Johan

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[mike]

I tried removing static in beforeMethod and it worked. I am not sure why it works. Do you ?

br,

//mike

[Johan Haleby]

Don't think PowerMock has support for creating mocks in those methods.

[mike]

Where can I find information about that.

//mike

[Johan Haleby]

I've added documentation for it here.

/Johan