Question

Part 1: Software Testing (6 marks): Assume that you are building a web-based grocery shopping system (similar to the ones that Woolworths and Coles provide).

The system allows customers to add grocery items to a (virtual) shopping cart and pay online. They will then be notified when the order is ready for pick-up in the selected store.

1. Identify one functional and one non-functional requirement related to that system (2 marks).

2. Describe how you would test those two requirements (2 marks).

3. For the item counts in the shopping cart, describe what equivalence classes and boundary values you would choose when creating the corresponding unit tests (2 marks).

Answer 1

1. Functional requirement - When the customer clicks on the "Add Item" button, the item should be visible in the customer's shopping cart.

Non-functional requirement - After the customer has added 100 different items in the shopping cart and wants to view the cart by clicking on the shopping cart icon, the shopping cart page should be loaded within 2 seconds.

2. In order to test the functional requirement, following steps should be taken:

a. Open the website.

b. Select an item and click on "Add Item".

c. Open the shopping cart.

d. The Item selected in step b above should be visible in the cart.

In order to test the non-functional requirement, following steps should be taken:

a. Open the website.

b. Select and add 100 different items in the shopping cart.

c. Click on the shopping cart icon and log the time in ms, say T1.

d. As soon as the page is loaded log the time in ms again, say T2.

e. T2 - T1 should be less than or equal to 2000ms or 2 secs.

3. There should a ShoppingCart class which will keep a reference to a List of Items that have been selected by the customer. The size of this list will determine the count of items in the cart. The following test cases should be incorporated to test the item count:

a. When no item is selected by the customer, the item count should be zero.

b. When "n" items have been added by the customer, the item count should be n.

c. If the user selects "n" items and checks out/pays for n-m items, the item count should be n-m

d. If the user selects "n" items and pays for n items, the item count should be zero.