Hi Alex , Hi Lakshman,

Thank you for the solution. It worked. But still having a problem with inserting "pricebook2id".

Please look at my code and suggest what should be the correct statement in place marked in red.

Also please add any thing else if its required in the code fo rthis to succeed....

CODE:

@istest
public class testAnOVIIDClass
{
static TestMethod void testAnOVIIDClass(){

//data preparation
list<opportunity> opplist=new list<opportunity>();
list<opportunitylineitem> olilist=new list<opportunitylineitem>();
list<id> pricebookidlist= new list<ID>();
list<pricebookentry> pbelist = new list<pricebookentry>();
list<product2> prolist = new list<product2>();
list<ovi_value__c> ovclist = new list<ovi_value__c>();

//insert opportunity test records
for(integer i=0;i<2;i++){
opportunity opy = new opportunity(Name = 'test opp' + i,stagename = 'closed won',closedate=date.parse('1/1/2020'));
opplist.add(opy);
}
insert opplist;
//Assert the inserted test records
list<opportunity> insertedopplist = new list<opportunity>([SELECT Name,Id,stagename FROM opportunity WHERE Id IN: opplist]);
for(opportunity opy : insertedopplist){
System.assertEquals(insertedopplist.size(),2);
}

//insert product test records
for(integer m=0;m<2;m++){
product2 prd = new product2();
prd.name = 'test product' + m;
prolist.add(prd);
}
insert prolist;
//Assert the inserted test records
list<product2> insertedprolist = new list<product2>([SELECT Name,Id FROM product2 WHERE Id IN: prolist]);
for(product2 prd : insertedprolist){
System.assertEquals(insertedprolist.size(),2);
}

//insert pricebookentry test records
for(integer l=0;l<2;l++){
pricebookentry pbo = new pricebookentry();
pbo.unitprice = 500 + l;
pbo.product2id = prolist[l].id;
pbo.pricebook2id =                    //since this is a required field if I run the test to check the assertion it fails and points here
pbelist.add(pbo);
}
insert pbelist;
//Assert the inserted test records
list<pricebookentry> insertedpbelist = new list<pricebookentry>([SELECT Name,Id FROM pricebookentry WHERE Id IN: pbelist]);
for(pricebookentry pbo : insertedpbelist){
System.assertEquals(insertedpbelist.size(),2);
}

//insert opportunity line item test records
for(integer k=0;k<2;k++){
opportunitylineitem aol= new opportunitylineitem();
aol.opportunityid = opplist[k].id;
aol.local_mrs__c = 100+k;
aol.local_nrs__c = 200+k;
aol.mrc__c = 300+k;
aol.nrc__c = 400+k;
aol.Local_Currency__c = 'test currency' + k;
olilist.add(aol);
}
insert olilist;
//Assert the inserted test records
list<opportunitylineitem> insertedolilist = new list<opportunitylineitem>([SELECT Id,opportunityid,local_mrs__c,local_nrs__c,mrc__c,nrc__c,Local_Currency__c
FROM opportunitylineitem WHERE Id IN: olilist]);
for(opportunitylineitem aol : insertedolilist){
System.assertEquals(insertedolilist.size(),2);
}

//insert ovi product test records
for(integer j=0;j<2;j++){
ovi_value__c ovv = new ovi_value__c(Name = 'test ovi value' + j, Product__c = 'testproduct'+j);
ovclist.add(ovv);
}
insert ovclist;
//Assert the inserted test records
list<ovi_value__c> insertedovclist = new list<ovi_value__c>([SELECT Name,ID FROM ovi_value__c WHERE Id IN: ovclist]);
for(ovi_value__c ovv : insertedovclist){
System.assertEquals(insertedovclist.size(),2);
}

//test.startTest();

//test.stopTest();

//create an instance
AnOVIIDClass anovi = new AnOVIIDClass();

}
}