public function testGetRedirectIds()
{
$mock = new MockRepository();
$q5 = new ItemId('Q5');
$q55 = new ItemId('Q55');
$q555 = new ItemId('Q555');
$mock->putRedirect(new EntityRedirect($q55, $q5));
$mock->putRedirect(new EntityRedirect($q555, $q5));
$this->assertEmpty($mock->getRedirectIds($q55), 'no redirects to redirect');
$this->assertEquals(array($q55, $q555), $mock->getRedirectIds($q5), 'two redirects');
}