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Topic: Introduction to BlackBox Testing Techniques |
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Author | Message |
yogindernath
Groupie Joined: 27Oct2008 Location: India Online Status: Offline Posts: 52 |
Topic: Introduction to BlackBox Testing Techniques Posted: 14Jul2009 at 10:03pm |
Firstly let us understand the meaning of Black Box Testing. 1) Boundary Value Analysis (BVA) 2) Equivalence Class Testing 4) Cause-Effect Graphing Technique
This testing technique believes and extends the concept that the density of defect is more towards the boundaries. This is done to the following reasons a) Usually the programmers are not able to decide whether they have to use <= operator or < operator when trying to make comparisons. b) Different terminating conditions of For-loops, While loops and Repeat loops may cause defects to move around the boundary conditions.
c) The requirements themselves may not be clearly understood, especially around the boundaries, thus causing even the correctly coded program to not perform the correct way. Strongly typed languages such as Ada and Pascal permit explicit definition of variable ranges. Other languages such as COBOL, FORTRAN and C are not strongly typed, so boundary value testing is more appropriate for programs coded in such languages. The use of equivalence classes as the basis for functional testing is appropriate in situations like
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