Black Box – BVT on 2 Variables software testing

Black Box – BVT on 2 Variables software testing

Suppose we have two variables x1 and x2 to test.

The range of x1: 10 to 90.

The range of x2: 20 to 70.

    X1  X2
Min 10 20
Min+ 11 21
Nominal 50 45
Max- 89 69
Max 90 70

Figure: Testing points detected in Simple Boundary Value Testing.

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Test cases.

Total Test cases =

(Number of variables * Number of testing points without nominal ) + (1 for  Nominal)

                        9=2*4+1

There are total 2 variables x1 and x2.

There are 4 possible values like min, min+, max- and max.

1 is for nominal.

We can generate 9 test cases from both variables x1 and x2

Test Case# X1,X2 Test Case # X1,X2 Test Case # X1,X2
1 10,45 2 11,45 3 50,45
4 89,45 5 90,45 6 50,20
7 50,21 8 50,69 9 50,70

Figure: Testing cases generated  in Simple Boundary Value Testing using 2 variables.