SYSTEM TESTING

It is end-to-end testing wherein testing environment is similar to the production environment.

Here, we navigate through all the features of the software test if the end business / end feature works.We just test the end feature and don’t check for data flow or do functional testing and all.

Let us consider an example to explain System Testing.

Let us consider Privat bank wants a software for overdraft feature. It asks Alliance company to develop the software and it provides CRS to develop the feature. The CRS contains how the overdraft feature works,

The difference between personal loan and overdrafts is – personal loans, loans can be provided upto 20 times more than the monthly income and also takes a long time to approve by the manager for personal loan. Whereas, in Overdraft, the loan amount is twice the monthly income and takes hardly a day to be approved by the manager. For ex, if a customer of Privat bank wants a overdraft loan of Rs 20,000 over his monthly income of Rs 10,000. The manager approves the loan. Let us say that the interest rate is 2% and the activation fee for the first time is Rs 250. When the customer repays the loan at the end of the month, then the total amount he pays is – 20,000 + (2% of 20,000) + Activation fee ( 250 ) = 20,000 + 400 + 250 = 20,650Rs. 

Now, for the 2^nd time if the same customer wants another overdraft loan – then no activation fee is taken. Now the customer applies for another overdraft loan of Rs20,000. This time the amount he has to repay is – 20,000 + ( 2% of 20,000 ) = 20,400Rs.

The development team develops the software which looks something like this, (Shown in the next page)

The development team develops the required software as shown above. 

The first figure represents the software that can be accessed by the manager only. 

The 2^nd figure represents the software that can be accessed by the bank’s customers.

Let us consider system testing now. We test for interest calculation when the customer takes overdrafts for the 1^st time and when he takes overdrafts for the 2^nd time.

Scenario 1

1) Login as A – Apply for OD Rs 20000 – Click on Apply – Logout

2) Login as manager – Approve OD of A – Logout

3) Login as A – Check OD Balance – Rs 20000 should be deposited – Logout

4) Change the server date to next 30days

5) Login as A – Check OD Balance – 20000 + 400 + 250 = 20650 – Logout

6) Login as manager – click on Deposit – Deposit Rs 650 – Logout

7) Login as A – Repay OD amount – Check OD balance – Rs 0

8) Login as manager – Click on Deposit – Deposit Rs 20000 to A’s account - logout

9) Login as A – Apply for OD Rs 20000 – Click on Apply – Logout

10) Login as manager – Approve OD of A – Logout

11) Login as A – Check OD Balance – Rs 20000 should be deposited – Logout

12) Change the server date to next 30days

13) Login as A – Check OD Balance – 20000 + 400 = 20400 – Logout

14) Login as manager – Deposit 400 – logout

15) Login as A – repay OD amount – Check OD balance – Rs 0

Scenario 2 – now we test another scenario where in – let us consider that the bank gives an offer that states that – a customer who takes Rs 50000 as OD for the first time will not be charged activation fee and activation fee will not be refunded when he takes another OD for the 3^rd time – we have to test for 3test scenarios – wherein we have to take OD of Rs 50000 for the first time and check for OD Repay Balance after applying for another OD for 3^rd time.

Scenario 3 – now we take in other scenario – let us consider that the software is being used normally by all customers – suddenly Privat bank decides to lower the Activation fee to Rs 125 for new customers – we have to test OD for new customers and see if its accepting only Rs 125.

But, then we get a requirement conflict – Suppose the customer has applied for Rs 20000 as OD with the existing Activation Fee for Rs 250. Before the manager is yet to approve it, the bank lowers the activation fee to Rs 125. Now we have to test what Activation Fee is charged for the OD of the Pending customer – In this case, the testing team cannot assume anything – they have to contact the Business Analyst or the Client and find out what they want in such a case.The development team develops the required software as shown above. The first figure represents the software that can be accessed by the manager only. The 2^nd figure represents the software that can be accessed by the bank’s customers.

Let us consider system testing now. We test for interest calculation when the customer takes overdrafts for the 1^st time and when he takes overdrafts for the 2^nd time.

Scenario 1

1) Login as A – Apply for OD Rs 20000 – Click on Apply – Logout

2) Login as manager – Approve OD of A – Logout

3) Login as A – Check OD Balance – Rs 20000 should be deposited – Logout

4) Change the server date to next 30days

5) Login as A – Check OD Balance – 20000 + 400 + 250 = 20650 – Logout

6) Login as manager – click on Deposit – Deposit Rs 650 – Logout

7) Login as A – Repay OD amount – Check OD balance – Rs 0

8) Login as manager – Click on Deposit – Deposit Rs 20000 to A’s account - logout

9) Login as A – Apply for OD Rs 20000 – Click on Apply – Logout

10) Login as manager – Approve OD of A – Logout

11) Login as A – Check OD Balance – Rs 20000 should be deposited – Logout

12) Change the server date to next 30days

13) Login as A – Check OD Balance – 20000 + 400 = 20400 – Logout

14) Login as manager – Deposit 400 – logout

15) Login as A – repay OD amount – Check OD balance – Rs 0

Scenario 2 – now we test another scenario where in – let us consider that the bank gives an offer that states that – a customer who takes Rs 50000 as OD for the first time will not be charged activation fee and activation fee will not be refunded when he takes another OD for the 3^rd time – we have to test for 3test scenarios – wherein we have to take OD of Rs 50000 for the first time and check for OD Repay Balance after applying for another OD for 3^rd time.

Scenario 3 – now we take in other scenario – let us consider that the software is being used normally by all customers – suddenly Privat Bank decides to lower the Activation fee to Rs 125 for new customers – we have to test OD for new customers and see if its accepting only Rs 125.

But, then we get a requirement conflict – Suppose the customer has applied for Rs 20000 as OD with the existing Activation Fee for Rs 250. Before the manager is yet to approve it, the bank lowers the activation fee to Rs 125. Now we have to test what Activation Fee is charged for the OD of the Pending customer – In this case, the testing team cannot assume anything – they have to contact the Business Analyst or the Client and find out what they want in such a case.