Last modified on April 20th, 2020
Black Box – BVT on 3 Variables software testing
Suppose we have three variable x,y, and z to test.
The range of x: 0 to 100
The range of y : 20 to 60
The range of z : 80 to 100
Figure: Testing points detected in Simple Boundary Value Testing.
Total Test cases =
(Number of variables * Number of testing points without nominal ) + (1 for Nominal)
- There are total 3 variables X,Y and Z
- There are 4 possible values like min, min+, max- and max
- 1 is for nominal
When we make test cases, we will fix the nominal value of two variables and change the values of the third variable.
- We will fix nominal values of X and Y and make a combination of these values with each value of Z variable.
Fix nominal values of X and Y are 50,40, and we will compare these two values with 80,81,90,99 and 100.
- We will fix nominal values of Y and Z and will make a combination of these values with each value of X variable.
Fix nominal values of Y and Z are 40, 90, and we will make a combination of these two values with 0,1,50,99,100
- We will fix nominal values of X and Z and will make a combination of these values with each value of Y variable.
Fix nominal values of X and Z are 50, 90 , and we will make combination of these two values with 20,21,40,59,60
We can generate 13 test cases from both variables X, Y and Z
|Test Case#||X,Y,Z||Test Case #||X,Y,Z||Test Case #||X,Y,Z|
Figure: Test cases generated in Simple Boundary Value Testing using 3 variables.
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