Equivalence Partitioning

1. A software program is used by a store to compute the discount it offers on the amount of purchases made by an individual: The purchase price input is an integer.

A purchase amount is in the range of 1 up to 50 there is no discount,

A purchase amount over 50 and up to 200 has a 5% discount, A purchase amount of 201 and up to 500 has a 10% discount, A purchase amount of 501 and above has a 15% discount

Additionally, if the customer is a member of the loyalty club they get an added discount of 20% on purchases of value 201 and greater.

If the value entered for the purchase is accidentally entered as a negative number the discount value returned is -1%.

The program input consists of 2 parameters: int purchases and boolean isMember. The program output is the int discount value as a percentage. Any invalid input returns a value of -1%.

Considering the Black-Box Software testing methods of Equivalence Partitions for this program fill in table with the input and output partitions. Then write out suitable tests ensuring to outline the partitions covered with each set of test data and highlight the error cases with an asterisk. [20 marks]

Test Cases	Input Partitions	Range
	Parameter purchases
EP1
EP2
EP3
EP4
	Parameter isMember
EP5
EP6

	Output Partitions
	Parameter discount
EP7
EP8
EP9
EP10
EP11
EP12
*EP13	Error Case	-1

Test Data

Test No.	Test Cases Covered	Inputs		Expected Outputs
		Purchases	isMember	discount
1
2
3
4
5
6
7*	EP13	0	False	-1