Can static java.lang.Package.getPackage() be mocked?

[Michael Remijan]

Greetings,

I've been attempting to mock the static method java.lang.Package.getPackage(String).  I've successfully used PowerMock to mock other static methods so I followed the same pattern to mock java.lang.Package.getPackage() and it didn't work.  I my unit test, the line PowerMock.verify(Package.class); fails to verify with a message saying "Package.getPackage(<any>): expected: 1, actual: 0".  So it's clear it's not getting mocked.  When I replace the call to Package.getPackage(String) with a class I specifically created, PackageGetter.getPackage(), this gets mocked successfully.  So is there something about Package being in the java.lang package which prevents it from being mocked?  NOTE: The Manifest object below is a method I created, not the JVM Manifest object.

@RunWith(PowerMockRunner.class)
@PrepareForTest(Package.class)
public class ManifestTest
{
     @Before
    public void before() {
        MockitoAnnotations.initMocks(this);
    }
     
    @Test
    public void getImplementationTitle()
    {
        // PowrMock, mock static
        PowerMock.mockStatic(Package.class);
       
//        // Mock class which uses the static
//        Package p = Mockito.mock(Package.class);
//        Mockito.when(p.getImplementationTitle()).thenReturn("getImplementationTitle");
       
        // Easymock, expect
        EasyMock.expect(Package.getPackage(EasyMock.anyString())).andReturn(null);
       
        // PowerMock, replay
        PowerMock.replay(Package.class);
       
        // Run test which uses static method
        Manifest m = new Manifest(this.getClass());
        String s = m.getImplementationTitle();
       
        // PowerMock, verify
        PowerMock.verify(Package.class);
       
        // Assert
        Assert.assertEquals("getImplementationTitle", s);
    }

}

[Johan Haleby]

Hi,

It may work although I would advise strongly against doing it unless you really have to :) You must use this approach though.

/Johan

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