Setting private static field with PowerMock 1.4 and Mockito 1.8.5 doesn't seem to work for me...

[Christian Balzer]

Hi everyone,

I hope I'm posting this to the right mailing list (despite the error message below).

I have difficulties setting a private static field in a class for one of my tests. Here is the class under test; the test is just below it.

import org.apache.http.impl.client.DefaultHttpClient;

import org.apache.http.impl.conn.PoolingClientConnectionManager;

//...

public class MyService extends ServiceUtils {

private static PoolingClientConnectionManager connectionManager;

private static DefaultHttpClient httpClient;

private ServiceLog log;

//...

public void doDestroy() throws ServiceException {

log.logDebug("Shutting down Connection Manager...");

try {

httpClient.getConnectionManager().shutdown();

} catch (Exception e) {

// catch any exception, format it, and pass it up.

throw new ServiceException(ErrorWrapper.formatException(e), e);

}

log.logInformation("Done.");

}

}

Now I want to test if the shutdown() method is actually called:

public class MyServiceTest {

@Test

public final void test_doDestroy() throws ServiceException {

  // variables

  PoolingClientConnectionManager connectionManager = new PoolingClientConnectionManager();

  PoolingClientConnectionManager spyConnectionManager = spy(connectionManager);

  DefaultHttpClient httpClient = new DefaultHttpClient(spyConnectionManager);

  MyService myService = new MyService();

// start setup mocks

ServiceLog mockedLog = mock(ServiceLog.class);

// end setup mocks

// start setup behaviour

Whitebox.setInternalState(myService, "log", mockedLog); 

Whitebox.setInternalState(MyService.class, "httpClient", httpClient);

// end setup behaviour

// act

stuboService.doDestroy();

// verify

verify(spyConnectionManager, times(1)).shutdown();

verify(mockedLog, times(1)).logDebug(anyString());

verify(mockedLog, times(1)).logInformation(anyString());

}

}

The above returns "java.lang.RuntimeException: Unable to set internal state on a private field. Please report to mockito mailing list." for the bold line.

If I change the first line to

@RunWith(PowerMockRunner.class)

@PrepareForTest({MyService.class})

public class MyServiceTest

I get the following "org.apache.http.conn.ssl.SSLInitializationException: class configured for SSLContext: com.sun.net.ssl.internal.ssl.SSLContextImpl not a SSLContext" (not sure what that means).

But if I remove those two lines again and then go on and change the bold line to the following:

 Whitebox.setInternalState(myService, "httpClient", httpClient);

the test passes - which is great, but I don't quite understand why.

I thought I had to use Whitebox.setInternalState() to set a private field, that passing in "xyz.class" would allow me to set a private static field and that I would not need to add the @RunWith and @PrepareForTest annotations if I just wanted to use PowerMock's Whitebox (and otherwise rely on Mockito). Can anyone help me, please?

Kind regards,

Christian

 

[Johan Haleby]

Hi, 

What minor version of PowerMock 1.4 are you using?

/Johan

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[Christian Balzer]

Hi Johan,

We use Maven to include PowerMock, and the version in the POM file is just 1.4, so I assume it's 1.4.0:

      <dependency>

         <groupId>org.powermock.api</groupId>

         <artifactId>powermock-api-mockito</artifactId>

         <version>1.4</version>

         <scope>test</scope>

      </dependency>

The md5 hash is f96af7c1d77d5ac3a646a19ebbf9277b, according to our Nexus. Does that help?

Best regards,

Christian

[Christian Balzer]

Hi all,

so, adding the following works:

@RunWith(PowerMockRunner.class)

@PrepareOnlyThisForTest({MyService.class})

@PowerMockIgnore( "org.apache.http.conn.ssl.*" )

but the underlying question remains, of course:

I thought I had to use Whitebox.setInternalState() to set a private field, that passing in xyz.class would allow me to set a private static field. Why do I need to pass an object in to set a static field?

Best regards,

Christian

[Johan Haleby]

Hi, 

I'm on vacation right not but I'll look into your questions when I'm back home. Hope that's alright.

Regards,

/Johan

[Johan Haleby]

Hmm I don't really know why you experience the exception that you see. It seems to me that you're using the Whitebox API correctly. I could probably look into it a bit if you provide a sample project otherwise it's really hard :/