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
Min1020
Min+1121
Nominal5045
Max-8969
Max9070

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,X2Test Case #X1,X2Test Case #X1,X2
110,45211,45350,45
489,45590,45650,20
750,21850,69950,70

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