Tutorial-6 To Generate Equivalence Class Test Cases-For the Triangle Problem

Tutorial-6: To Generate Equivalence Class Test Cases-For the Triangle Problem

“The triangle program takes three integers, a, b and c as input. These are taken to be the sides of the triangle.

The output of the program can be either of: Equilateral Triangle, Isosceles Triangle, Scalene or “Not a Triangle”.

We can use these to identify output (range) equivalence classes as under:

01 = {<a, c=”” b,=””> : the triangle is equilateral}
</a,>

02 = {<a, c=”” b,=””> : the triangle is isosceles}
</a,>

03 = {<a, c=”” b,=””> : the triangle is scalene}
</a,>

04 = {<a, c=”” b,=””> : sides a, b and c do not form a triangle}</a,>

Objective of this Tutorial: To apply the four techniques of equivalence class partitioning one by one & generate appropriate test cases?

1) Weak Normal Equivalence Class: The four weak normal equivalence class test cases can be defined as under

2) Strong Normal Equivalence Class: Since no valid subintervals of variables a, b and c exist, so the strong normal equivalence class test cases are identical to the weak normal equivalence class test cases.

3) Weak Robust Equivalence Class: Considering the invalid values for a, b and c yields the following additional weak robust equivalence class test cases

4) Strong Robust Equivalence Class: Test Cases falling under this category are

It may be noted that the expected outputs describe the invalid input values thoroughly.

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