it('does not update existing ids', function() {
   SelectedGroupStore.records = {1: false, 2: true};
   SelectedGroupStore.add([3]);
   expect(SelectedGroupStore.records).to.eql({1: false, 2: true, 3: false});
 });
 it('defaults value of new ids to \'allSelected()\'', function() {
   SelectedGroupStore.records = {1: true};
   SelectedGroupStore.add([2]);
   expect(SelectedGroupStore.records).to.eql({1: true, 2: true});
 });