April 29, 2008

Boundary Value Analysis

This method leads to a selection of test cases that exercise boundary values. Rather than focusing on input conditions, BVA derives test cases from the output domain.

  • For input ranges bounded by a and b, test cases should include values a and b and just above and just below a and b respectively.
That is a, b, a+1, a-1, b+1, b-1
  • If an input condition specifies a number of values, test cases should be developed to exercise the minimum and maximum numbers and values just above and below these limits.
  • If internal data structures have prescribed boundaries, a test case should be designed to exercise the data structure at its boundary(in case of loops).

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