Test Coverage for DataBase.Error

[Krishna Prabhakar]

hi friends,

I am trying to write a test method for a class where i have DataBase.Error which is not getting covered.Can anyone help me to make this coverage successful. How can i make this DataBase.Error to be covered.

Class Code:

global class SystemUtility {
    public static String getErrorString(List<Database.Saveresult> saveResult){
        String error='';
        for(Database.Saveresult result : saveResult){
            if(!result.isSuccess()){ 
                
                for(Database.Error err : result.getErrors()){
                    error+=err;
                    
                }
                return error;
            }
        }
        return error;       
    }
}

Test Class:

@isTest
private class SystemUtilityTest {

    static testMethod void myUnitTest() {
          
          Territory ter = new Territory(name = 'testterr1',Geo__c = 'AMS'  ,Super_Org__c ='CA_SO', Organization__c = 'CANADA_FIELD', Region__c = 'CANADA', Area__c = 'CA_ENTERPRISE_1', District_Team__c = 'CA_DISTRICT_1', Sector_Vertical__c = 'HEALTHCARE', Segment__c = 'COMMERCIAL', Territory_Type__c = 'HEALTHCARE_ISV_TERRITORY', Active_Flag__c = 'Active', Fiscal_Year__c = 'Old', Open_Territory__c = false , Effective_Start_Date__c = System.today(), Effective_End_Date__c = null, Business_Reason__c = 'Test Purpose', Quota_Bearing__c = true , OIC_Territory_Flag__c = false );
          List<Territory> terrs = new List<Territory>();
          terrs.add(ter);
          
          Profile prof =[select id from profile where name = 'Master GCM Administrator'];
          User us = [select id,profileId from user where profileId =:prof.Id and IsActive = true LIMIT 1];
          
          // Run as Master GCM Administrator
          System.runAs(us){
            
          // Start the Test  
          Test.startTest();
          
          List<Database.Saveresult> res = Database.Insert(terrs);
          String errorStr = SystemUtility.getErrorString(res);
          
          //Stop the Test
          Test.stoptest();
          
          }
    }
}

Thanks,
Krishna Prabhakar.