public function testGetByUsersFail()
 {
     $mock = Test::double('RemoteGallery');
     $galleries = RemoteGallery::getByUsers([]);
     $mock->verifyNeverInvoked('newModel');
     $mock->verifyNeverInvoked('modifyAttributes');
     $mock->verifyInvoked('newCollection');
     assertThat($galleries, is(emptyTraversable()));
 }