Would like to know whether Black Box testing techniques like Boundary Value Analysis and Equivalence Partitioning – during which phases of testing are they used,if possible with examples ?
Answer1:Also Boundary Value Analysis and Equivalence Partitioning can be used in unit or component testing, and generally is used in system testing Example, you have a module designed to work out the tax to be paid:An employee has £4000 of salary tax free. The next £1500 is taxed at 10%The next £28000 is taxed at 22%Any further amount is taxed at 40%You must define test cases that exercise valid and invalid equivalence classes:Any value lower than 4000 is tax freeAny value between 4000 and 5500 must paid 10%Any value between 5501 and 33500 must paid 22%Any value bigger than 33500 must paid 40%And the boundary values are: 4000, 4001, 5501, 33501Answer2:This Boundary value analysis and Equivalence partitioning is used to prepare the positive and negative type test cases. Equivalence partitioning: If you want to validate the text box which accepts the value between 2000 to 10000 , then the test case input is partitioned as the following way 1.
