Hi all,

Please help me to increase code coverage in test class, I have written a apexclass,

 public void storeProductsTxt(){
        System.debug('********** Store Products in XML **********');        
        XmlStreamWriter w = new XmlStreamWriter();
        w.writeStartDocument(null, '1.0');
        w.writeStartElement(null, 'Products', null);
        
        String output = '';
        
        for (Product2 p : [Select p.Description, p.Family, p.Id, p.IsActive, p.Name, p.PS_Product_SKU__c, p.Strategic_Value__c, p.Unit_of_Measure__c, 
            p.Maximum_Order_Qty__c, p.Multiple_Order_Qty__c, 
            (Select Name, Quantity_in_Stock__c, Ship_From__c From Inventory__r) 
            from Product2 p where isActive = true limit 10]){
                
            output = '<Product><Id>' + p.Id + '</Id><Name>' + p.Name + '</Name><Description>' + p.Description + '</Description><PSProductSKU>' + p.PS_Product_SKU__c + '</PS Product SKU><UOM>' + p.Unit_of_Measure__c + '</UOM><MAX>' + String.valueOf(p.Maximum_Order_Qty__c) + '</MAX><Multiple>' + String.valueOf(p.Multiple_Order_Qty__c) + '</Multiple><Inventories>';
            
            for (Inventory__c inv : p.Inventory__r){
                output += '<Inventory><WH>' + inv.Ship_From__c + '</WH><Stock>' + String.valueOf(inv.Quantity_In_Stock__c) + '</Stock></Inventory>';    
            }
            
            output += '</Inventories></Product>';
            
            w.writeCData(output);
            
            //System.debug('p: ' + p);
            //output = p + '\n';
            //b = Blob.valueOf(output); 
            
        }
        w.writeEndElement();
        w.writeEndDocument();
        
        String xmlOutput = w.getXmlString();
        System.debug('*** XML: ' + xmlOutput);
        w.close();
        //System.debug('--> output: ' + output);
        
        //Blob b = Blob.valueof(xmlOutput);
        Blob b = Blob.valueof('text');
        
        List<Attachment> list_attachments = [Select Body from Attachment where Name = 'ProductInfo.xml' and ParentId = '001T000000F7raXIAR' limit 1000];
        if (list_attachments.size() > 0){
            delete list_attachments;
        }
        
        Attachment a = new Attachment(); 
        a.Name = 'ProductInfo.xml';
        a.Body = b;
        a.ParentId = '001T000000F7raXIAR';
        a.ContentType = 'text/xml';
        a.IsPrivate = false;
        insert a;
        
    }
getting error message as invalid cross reference id .

Thanks in advance.