adUnitCodes in auctionEnd event are duplicated for ephemeral

[muuki88]

Type of issue

Bug

Description

The pbjs.requestBids() method can be called in two different ways.
In both examples I make use of the twin ad unit feature.

Add ad units and request adUnitCodes

// create ad units
pbjs.addAdUnits([
  { code: 'div-1', /* ... */ },
  { code: 'div-1', /* ... */ },
]);

// request bids for the created ad units
pbjs.requestBids({adUnitCodes: ['div-1']});

With this call structure, the adUnitCodes array in the auctionEnd event has only the ad unit codes from the array.

Ephemeral ad units

// request bids 
pbjs.requestBids({
  adUnits: [
    { code: 'div-1', /* ... */ },
    { code: 'div-1', /* ... */ },
  ]
});

With this call structure, the adUnitCodes array in the auctionEnd event has duplicated code s .

Steps to reproduce

Use Ephemeral ad units variant from the description and

pbjs.getEvents().filter(event => event.eventType === 'auctionEnd')

and look the adUnitCodes array.

Test page

Expected results

adUnitCodes are always unique.

Actual results

adUnitCodes are unique only if explicitly specified in the adUnitCodes requestBids parameter.

Platform details

• prebid 8.52.1
• prebid 9.8.0

Other information

What is the behaviour if adUnitCodes and adUnits are provided as params?

[patmmccann]

With this call structure, the adUnitCodes array in the auctionEnd event has duplicated code s .

This is a bug we can fix.