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Tag Archives: Testing Techniques

Equivalence Class Partitioning

Friday, November 13, 2009

Originally Published Sunday, September 30, 2007
I have been teaching formal testing techniques for several years at Microsoft and University of Washington Extension. Techniques are systematic procedures to help solve a complex problem. A technique does not find all types problems; techniques are generally very good at finding very specific classes of defects. But, the usefulness [...]

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Boundary Testing and Wrapping; or 1,073,741,824 * 1,073,741,824 = 0

Friday, November 13, 2009

Originally Published Friday, September 14, 2007
I have never been really good at math. Sure I understand basic formulas, but I rely on a calculator when I run out of fingers and toes. I am envious of people who can look at a hexadecimal or octal value and convert it to an integer value in their [...]

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Casting Data Types and Testing Boundaries

Friday, November 13, 2009

Originally Published Wednesday, September 05, 2007
The traditional concept of boundary testing was established as a systematic procedure to more effectively and more efficiently identify a particular category of defects. Historically, boundary value analysis has focused on bounded physical (countable) linear input and/or output variables of independent parameters, and is especially useful in programming languages that [...]

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And More on Testing Mp3 Files and the Boundary Testing Debate

Thursday, November 12, 2009

Originally Published Wednesday, March 07, 2007
Over the past 3 days I have learned more about Mp3 file encoding and decoding than I have since the technology was introduced. I don’t spend time downloading files from the Internet to burn CD’s, I don’t own an iPod or Mp3 player, or a digital video recorder. So, prior [...]

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More on Boundary Testing and Mp3 Encodings

Thursday, November 12, 2009

Originally Published Tuesday, March 06, 2007
My previous post refuting a conjecture by Pradeep Soundarajan suggesting there are no boundary values in software was a bit harshly worded, and to him and the readers I apologize. Occasionally I get a little overzealous. I am sure Pradeep is a great guy, and I must say his reply [...]

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Allpairs, Pairwise, Combinatorial Analysis

Wednesday, November 11, 2009

Originally Published Wednesday, October 25, 2006
Last week I went to StarWest as a presenter and as a track chair to introduce speakers. Being a track chair is wonderful because you get to interface more closely with other speakers. Anyway…one of the speakers I introduced was Jon Bach. Jon is a good public speaker, and I [...]

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Testing Techniques – Are They Gimmicks or Useful Tools?

Tuesday, November 10, 2009

Originally Published Friday, August 11, 2006
Last year an ‘expert’ tester and consultant claimed test techniques were gimmicks. I don’t claim to be an expert tester, but I do consider myself to be a professional tester constantly striving to improve my skills and broaden my knowledge to make me a better tester and promote the discipline [...]

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