All,

I need help writing a test class for this Apex Trigger that fires on the CPQ Quoteline. Can anyone help me out?

Apex Trigger:
trigger QLSummaryRollUps on SBQQ__QuoteLine__c (after insert,after update,after delete) {
    list<SBQQ__QuoteLine__c> l;
    if(Trigger.isInsert || Trigger.isUpdate)
    {
        l = Trigger.new;
    }
    if(Trigger.isDelete)
    {
        l = Trigger.old;
    }
    Decimal rec=0.00;
    Decimal upf=0.00;
    Decimal hware=0.00;
    Decimal Nrec=0.00;
    Decimal Nupf=0.00;
    Decimal Nhware=0.00;    
    String qid;
    
    
    for(SBQQ__QuoteLine__c q : l)
    {
        qid=q.SBQQ__Quote__c;
    }
    for(SBQQ__QuoteLine__c f : l)
    {
        if(f.Quote_Line_Grouping__c != null){
        if(f.Quote_Line_Grouping__c == 'Recurring Fee')
        {
                rec+=f.Adjusted_List_Line_Item__c;
                Nrec+=f.SBQQ__NetTotal__c;
        }
        if(f.Quote_Line_Grouping__c == 'Hardware')
        {
                hware+=f.Adjusted_List_Total__c;
                Nhware+=f.SBQQ__NetTotal__c;
        }        
        if(f.Quote_Line_Grouping__c == 'Upfront Fee')
        {
                upf+=f.Adjusted_List_Total__c;
                Nupf+=f.SBQQ__NetTotal__c;
        } 
        }   
    }
    SBQQ__Quote__c q=[SELECT Id, Adjusted_List_Total_Recurring_Fee_2__c, Adjusted_List_Total_Hardware_2__c, Adjusted_List_Total_Upfront_Fee_2__c, Net_Total_Hardware_2__c, Net_Total_Recurring_Fee_2__c, Net_Total_Upfront_Fee_2__c FROM SBQQ__Quote__c WHERE Id =: qid];
    q.Adjusted_List_Total_Recurring_Fee_2__c=rec;
    q.Adjusted_List_Total_Hardware_2__c=hware;
    q.Adjusted_List_Total_Upfront_Fee_2__c=upf;
    q.Net_Total_Recurring_Fee_2__c=Nrec;
    q.Net_Total_Hardware_2__c=Nhware;
    q.Net_Total_Upfront_Fee_2__c=Nupf;    
    System.debug(rec);
    System.debug(hware);
    System.debug(upf);
    System.debug(Nrec);
    System.debug(Nhware);
    System.debug(Nupf);
    update q;
}