it('triggers an update', function() {
   SelectedGroupStore.deselectAll();
   expect(this.trigger.called).to.be.true;
 });
 it('sets all records to false', function() {
   SelectedGroupStore.records = {1: true, 2: true, 3: false};
   SelectedGroupStore.deselectAll();
   expect(SelectedGroupStore.records).to.eql({1: false, 2: false, 3: false});
 });