public function testGetSiteLinksForItem()
 {
     $one = new Item(new ItemId('Q1'));
     $one->getSiteLinkList()->addNewSiteLink('dewiki', 'Xoo');
     $one->getSiteLinkList()->addNewSiteLink('enwiki', 'Foo');
     $this->repo->putEntity($one);
     // check link retrieval
     $this->assertEquals(array(new SiteLink('dewiki', 'Xoo'), new SiteLink('enwiki', 'Foo')), $this->repo->getSiteLinksForItem($one->getId()));
     // check links of unknown id
     $this->assertEmpty($this->repo->getSiteLinksForItem(new ItemId('q123')));
 }