I am working on a class which creates an case if we post something in a chatter group. My code is working as expected nut I cannot cover the code inside two IF blocks in my test class. Can any one please suggest.

My class:
Id parentID = Feeditem.ParentId;
String groupName;
         string smartBarLabel = Label.SmartBar_Custom_Label;
        string IPToolLabel = Label.IP_Tool_Support_custom_label;
Map<id,CollaborationGroup> CollaborationGroupName = new Map<id,CollaborationGroup>([select id, Name from CollaborationGroup where                                                                                                CollaborationType='Public' and ID in :FeedId]);
Case css = new Case();
                if(CollaborationGroupName.size() > 0) {
                    groupName = CollaborationGroupName.get(parentID).Name;
                }
                if(groupname!=null && groupName.equalsIgnoreCase(smartBarLabel)) {
                    css.RecordTypeId = ind.id;
                    if(SmartBarID!=null)
                        css.OwnerId=smartBarID;
                }
                else if(groupname!=null && groupname.equalsIgnoreCase(IPToolLabel)) {
                    css.Recordtypeid=IPind.id;
                    if(IPToolID!=null)
                        css.OwnerId=IPToolID;
                }    
                
                css.Chatter_Name__c=Feedpost.CreatedById;
                css.Description=FeedBody;
                css.Subject=Feedpost.Title;
                //css.Reason='Function';
                //css.OwnerId=Label.CaseQueueOwner;
                css.Type='Chatter';
                css.FeedItemId__c=feedpost.id;
                if(Feedpost.Title==null) css.Subject=FeedBody;
                system.debug('the feedpostparent********'+css.FeedItemId__c);
                csslist.add(css);  

Test Class :
       CollaborationGroup cg2 = new CollaborationGroup(Name='xxxx', CollaborationType='Public');
        cg2.OwnerId=u1.Id;
        insert cg2;
        FeedItem fitem2 = new FeedItem();
        fitem2.Body = 'yyyyy';
        fitem2.CreatedById = u1.Id;
        fitem2.ParentId = cg2.Id;
        insert fitem2;
       
        String groupnm = cg2.Name;
        Case aCase = new Case();
        system.assert(groupnm == 'xxxx');
        system.assert(groupnm!=NULL);
        aCase.OwnerId = testGroup.Id;
        aCase.Recordtypeid=ind.id;
        aCase.Description='FeedBody';
        aCase.FeedItemId__c=fitem2.Id;
        aCase.Subject='Feedpost.Title';
        aCase.Reason='Function';
        aCase.Type='Chatter';
        aCase.Chatter_Name__c = fitem2.CreatedById;
        insert aCase;