Получение параметров полей из JSON в POSTMAN Cannot read property 'offer' of undefined

Всем привет! Недавно начала изучать автотесты в Postman, имеется следующая задача: нужно найти значение параметра offerType и узнать равно ли оно 7 или нет.

Пишу следующий тест:

pm.test("Checking offer blocks", function () {

   var jsonData=  pm.response.json();
   var list = jsonData.length;
   console.log(jsonData.productOffers.length);
     jsonData.productOffers.forEach(shortProduct => {
     pm.expect(jsonData.productOffers.shortProduct.offer.offerType).to.eql(7)
   

})});

Получаю следующий ответ: TypeError: Cannot read property 'offer' of undefined

Ниже прикладываю JSON

{
"productOffers": [
    {
        "shortProduct": {
            "id": "000000000000000121_KG",
            "name": "Слива черная/красная, 1 кг",
            "eanMain": null,
            "department": null,
            "offer": {
                "offerType": 7,
                "dateEnd": "2020-10-28T00:00:00+03:00",
                "percent": null,
                "description": null,
                "badgeText": "x10"
            },
            "badges": null,
            "isAdult": false,
            "priceParams": {
                "tariffingPrice": 149.99,
                "regularPrice": 0.0,
                "endDate": "9999-12-31T00:00:00+03:00",
                "orderPrice": 149.99,
                "sellType": "weight",
                "tariffingVolume": 1,
                "tariffingUom": "г",
                "orderMinVolume": 0.5,
                "orderStep": 0.5,
                "orderUom": "г"
            }
        },
        "actionId": "800000103",
        "promoId": "14_6BD2F3205BCFB84B170076007FBCEFA3",
        "status": "E0003"
    },
    {
        "shortProduct": {
            "id": "000000000000000123_KG",
            "name": "Черешня, 1 кг",
            "eanMain": "2000000000237",
            "department": null,
            "offer": {
                "offerType": 6,
                "dateEnd": "2020-10-26T00:00:00+03:00",
                "percent": 98.0,
                "description": null,
                "badgeText": "-98%"
            },
            "badges": null,
            "isAdult": false,
            "priceParams": {
                "tariffingPrice": 19.00,
                "regularPrice": 1699.99,
                "endDate": "2020-10-26T00:00:00+03:00",
                "orderPrice": 19.00,
                "sellType": "weight",
                "tariffingVolume": 1,
                "tariffingUom": "кг",
                "orderMinVolume": 0.5,
                "orderStep": 0.5,
                "orderUom": "кг"
            }
        },
        "actionId": "900000103",
        "promoId": "14_62D2F3205BCFB84B170076007FBCEFA3",
        "status": "E0003"
    },
    {
        "shortProduct": {
            "id": "000000000000000126_KG",
            "name": "Виноград Биколор фасованный, 1 кг",
            "eanMain": null,
            "department": null,
            "offer": {
                "offerType": 6,
                "dateEnd": "2020-10-30T00:00:00+03:00",
                "percent": 98.0,
                "description": null,
                "badgeText": "-98%"
            },
            "badges": null,
            "isAdult": false,
            "priceParams": {
                "tariffingPrice": 2.50,
                "regularPrice": 199.99,
                "endDate": "2020-10-30T00:00:00+03:00",
                "orderPrice": 0.02,
                "sellType": "weight-by-piece",
                "tariffingVolume": 1,
                "tariffingUom": "кг",
                "orderMinVolume": 1.0,
                "orderStep": 1.0,
                "orderUom": "уп."

            }
        },
        "actionId": "900000113",
        "promoId": "14_66D2F3205BCFB84B170076007FBCEFA3",
        "status": "E0003"
    }
]

}