    @Test
    public void testUnlinkInBackground() {

        ParseUser user = mock(ParseUser.class);
        when(user.unlinkFromInBackground(anyString())).thenReturn(Task.<Void>forResult(null));
        ParseFacebookUtils.isInitialized = true;

        ParseFacebookUtils.unlinkInBackground(user);
        verify(user).unlinkFromInBackground("facebook");
    }