Question

Consider a program that takes three numbers as input and prints the values of these
numbers in descending order. Its input is a triple of positive integers (say x, y and z)
and values are from interval [300,700]. Generate boundary value and robust test
cases.

Answer 1

Boundary Value Analysis is a Test case Design Technique to test with values on the boundary of a given range.

For a given range a to b, we need to check for values such as a+1, a-1, b+1 and b-1 .

Test Case to check if Program functions as Required

Pre- Requisite - The Program should take 3 Positive integers (x,y,z) in range 300-700 and display them in descending order

Test case num Action Pre-condition Expected Result Actual Result Report 1 Run the Program and take x,y,z as input from the user. The values x,y, and z should be positive and in the range of 300-700. The program should run successfully and print the values of x, y and z in descending order 2 Run the Program and take x,y,z as input from the user. Pass 1 or more negative value during input. The Program should Fail and display a user friendly message "Pls Enter positive integers in range 300-700" 3 Run the Program and take x,y,z as input from the user. Boundary value analysis Pass 299 as value for either x,y or z The Program should Fail and display a user friendly message "Pls Enter positive integers in range 300-700" 4 Run the Program and take x,y,z as input from the user. Boundary value analysis Pass 701 as value for either x,y or z The Program should Fail and display a user friendly message "Pls Enter positive integers in range 300-700" 5 Run the Program and take x,y,z as input from the user. Pass 300 as value for either x,y or z The program should run successfully and print the values of x, y and z in descending order 6 Run the Program and take x,y,z as input from the user. Pass 700 as value for either x,y or z The program should run successfully and print the values of x, y and z in descending order