How would you test the "Add product to cart" endpoint? There is a limit: no more than 30 products can be added to the cart. Fields: productId - the id of the product to add quantity - optional, if not specified, the quantity will be 1 POST [link] Params Authorization Headers (8) Body none form-data x-www-form-urlencoded { "productId": 1, "quantity": 2 }

To test the "Add to Cart" endpoint with a maximum limit of 30 items, the following scenarios should be checked:

1. Adding an item with specified quantity

   • Send a request with productId and quantity < 30, verify that the item is added with the correct quantity.

2. Adding an item without specifying quantity

   • Send a request with only productId, verify that 1 item is added.

3. Adding an item with quantity = 0 or a negative number

   • Check that the server returns an error (e.g., 400 Bad Request).

4. Adding an item with quantity > 30

   • Verify that the server does not allow adding more than 30 items, and returns an error.

5. Adding an item when the cart already contains items

   • Verify that the total number of items does not exceed 30.

6. Adding a non-existent productId

   • Check that the server returns an error (e.g., 404 Not Found).

7. Checking boundary values

   • Add 30 items in one request.
   • Add multiple requests with a total of 30 items.

8. Checking request format

   • Send a request with an incorrect body format, verify error handling.

Example curl request:

curl -X POST [link] \
  -H "Content-Type: application/json" \
  -d '{"productId":1,"quantity":2}'

Also, ensure that after a successful addition, the cart updates correctly.