robustness testing – Programmerbay

Design test cases and test the program of Quadratic Equation problem using Robustness testing

Sandeep Verma — Sat, 19 Sep 2020 12:49:06 +0000

An equation is said to be a quadratic equation if only if it is in the form of ax²+bx+c where a can’t be 0. We will use the Quadratic formula for calculating the roots to check whether they are imaginary or real.

This Quadratic formula is used only when b²– 4ac >= 0. such that, If b²– 4ac > 0 , means the equation has more than one real roots if b²– 4ac = 0 , means equal or single root if b²– 4ac <0, i3mplies imaginary root Lastly, if a is 0, then the equation would not be counted as a quadratic equation.

So, a quadratic equation can have [ Real, Equal, Imaginary, not quadratic ]

Program

Check out “Quadratic Equation” program along with its tested test cases.

Robustness Testing

We are assuming interval [0,10] where our input values will come in between and we will create test cases using Robustness testing accordingly.

In Robustness Testing, it will produce 6N+1 test cases which means, in this case, there will be 6*3+1 = 19 test cases.

Test ID	a	b	c	Expected Output	Program Output	Tested Outcome
1	-1	5	5	Invalid Input	Invalid Input	Pass
2	0	5	5	Not Quadratic	Not Quadratic	Pass
3	1	5	5	Real	Real	Pass
4	9	5	5	Imaginary	Imaginary	Pass
5	10	5	5	Imaginary	Imaginary	Pass
6	11	5	5	Invalid Input	Invalid Input	Pass
7	5	-1	5	Invalid Input	Invalid Input	Pass
8	5	0	5	Imaginary	Imaginary	Pass
9	5	1	5	Imaginary	Imaginary	Pass
10	5	9	5	Imaginary	Imaginary	Pass
11	5	10	5	Equal	Equal	Pass
12	5	11	5	Invalid Input	Invalid Input	Pass
13	5	5	-1	Invalid Input	Invalid Input	Pass
14	5	5	0	Real	Real	Pass
15	5	5	1	Real	Real	Pass
16	5	5	9	Imaginary	Imaginary	Pass
17	5	5	10	Imaginary	Imaginary	Pass
18	5	5	11	Invalid Input	Invalid Input	Pass
19	5	5	5	Imaginary	Imaginary	Pass

How it is different from Boundary Value Analysis?

We can observe that previously we didn’t check for input values higher than the maximum boundary limit and lesser than the minimum boundary limit. In other words, we haven’t tested our code for Invalid Inputs in Boundary Value Analysis but in Robustness testing, we did make test cases for invalid inputs too and rewrite the code to fulfill this condition.

Design the test cases and test the program of Previous Date problem by using Robustness Testing

Sandeep Verma — Fri, 20 Sep 2019 06:50:35 +0000

In previous date problem, we will test our code using Robustness Testing to check whether it can provide expected the previous date as an output or not. We are considering interval [2000,2050] for year, [1,31] days for date, [1,12] for month. If we look closely, we require to figure out for given year input whether it is a leap year or not.

We will be using Robustness Testing to generate test cases. The expected output can be [Invalid input, Invalid date, previous Date].

Program

Here is the “previous date problem” program along with its tested test cases.

Robustness Testing

So, there will be 6N+ 1 test cases that is 6*3 +1 =19 in this case as we are using Robustness Testing.

Test ID	Date	Month	Year	Expected Output	Program Output	Test Outcome
1	0	6	2025	Invalid Input	Invalid Input	Pass
2	1	6	2025	31-5-2025	31-5-2025	Pass
3	2	6	2025	1-6-2015	1-6-2015	Pass
4	30	6	2025	29-6-2015	29-6-2015	Pass
5	31	6	2025	Invalid Date	Invalid Date	Pass
6	32	6	2025	Invalid Input	Invalid Input	Pass
7	15	0	2025	Invalid Input	Invalid Input	Pass
8	15	1	2025	14-1-2025	14-1-2025	Pass
9	15	2	2025	14-2-2025	14-2-2025	Pass
10	15	11	2025	14-11-2025	14-11-2025	Pass
11	15	12	2025	14-12-2025	14-12-2025	Pass
12	15	13	2025	Invalid Input	Invalid Input	Pass
13	15	6	1999	Invalid Input	Invalid Input	Pass
14	15	6	2000	14-6-2000	14-6-2000	Pass
15	15	6	2001	14-2-2001	14-2-2001	Pass
16	15	6	2049	14-6-2049	14-6-2049	Pass
17	15	6	2050	14-6-2050	14-6-2050	Pass
18	15	6	2051	Invalid Input	Invalid Input	Pass
19	15	6	2025	14-6-2025	14-6-2025	Pass

Design the test cases and test the program of Triangle problem by using Robustness Testing

Sandeep Verma — Thu, 19 Sep 2019 18:24:35 +0000

A polygon with 3 sides having any of the side greater than the sum of its other two sides cannot be considered as triangle. On the basis of sides, a triangle can be categorized in isosceles, equilateral and scalene triangle.

An isosceles triangle is a triangle in which two sides are equal.

An equilateral triangle is a triangle in which all sides are equal.

A scalene triangle is a triangle in which no two sides are equivalent to one other.

Program:

Here you can find “Triangle problem” program along with its tested output.

Robustness Testing

We are assuming interval [1,10] for creating test cases and we will generate test cases using Robustness testing accordingly.

In Robustness Testing, 6N+1 test cases will be generated, which means, in this case, 6*3+1 = 19 test cases.

Test ID a b c Expected Output Program Output Tested Outcome

1 0 5 5 Invalid Input Invalid Input Pass

2 1 5 5 Isosceles Isosceles Pass

3 2 5 5 Isosceles Isosceles Pass

4 9 5 5 Isosceles Isosceles Pass

5 10 5 5 Not a Triangle Not a Triangle Pass

6 11 5 5 Invalid Input Invalid Input Pass

7 5 0 5 Invalid Input Invalid Input Pass

8 5 1 5 Isosceles Isosceles Pass

9 5 2 5 Isosceles Isosceles Pass

10 5 9 5 Isosceles Isosceles Pass

11 5 10 5 Not a Triangle Not a Triangle Pass

12 5 11 5 Invalid Input Invalid Input Pass

13 5 5 0 Invalid Input Invalid Input Pass

14 5 5 1 Isosceles Isosceles Pass

15 5 5 2 Isosceles Isosceles Pass

16 5 5 9 Isosceles Isosceles Pass

17 5 5 10 Not a Triangle Not a Triangle Pass

18 5 5 11 Invalid Input Invalid Input Pass

19 5 5 5 Equilateral Equilateral Pass