UOE-11332: bid rejection handling and improve test assertions for Vas…

…t version filtering

exchange/exchange_ow.go

@@ -410,7 +410,12 @@ func filterBidsByVastVersion(adapterBids map[openrtb_ext.BidderName]*entities.Pb
 						Message:     fmt.Sprintf("%s Bid %s was filtered for Imp %s with Vast Version %s: Incompatible with GAM unwinding requirements", seatBid.Seat, pbsBid.Bid.ID, pbsBid.Bid.ImpID, vastVersion),
 						WarningCode: errortypes.InvalidVastVersionWarningCode,
 					})
-					rejectedBid = append(rejectedBid, seatBid)
+					rejectedBid = append(rejectedBid, &entities.PbsOrtbSeatBid{
+						Seat:      seatBid.Seat,
+						Currency:  seatBid.Currency,
+						HttpCalls: seatBid.HttpCalls,
+						Bids:      []*entities.PbsOrtbBid{pbsBid},
+					})
 					continue
 				}
 			}

exchange/exchange_ow_test.go

@@ -2306,12 +2306,22 @@ func TestFilterBidsByVastVersion(t *testing.T) {
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {
 			errs := filterBidsByVastVersion(tt.args.adapterBids, tt.args.seatNonBid)
-			assert.ElementsMatch(t, tt.want, tt.args.adapterBids)
+			want := mapToSlice(tt.want)
+			got := mapToSlice(tt.args.adapterBids)
+			assert.ElementsMatch(t, want, got)
 			assert.ElementsMatch(t, tt.errs, errs)
 		})
 	}
 }
 
+func mapToSlice(bidMap map[openrtb_ext.BidderName]*entities.PbsOrtbSeatBid) []*entities.PbsOrtbSeatBid {
+	var result []*entities.PbsOrtbSeatBid
+	for _, bid := range bidMap {
+		result = append(result, bid)
+	}
+	return result
+}
+
 func TestValidateVastVersion(t *testing.T) {
 	tests := []struct {
 		name            string