L1 - Software Testing Quality Assurance&...

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Unformatted text preview: Software Testing, Quality Assurance & Maintenance—Lecture 1 Patrick Lam University of Waterloo January 4, 2010 “The Testing Course” Course mechanics Textbook: I will be (somewhat loosely) following Ammann and Offutt. Website: http://patricklam.ca/stqam Grace days: You may submit assignments up to 4 days late in total. Why Test? Source: Wikipedia Failures Let’s consider: consequences; causes; avoidance (before it’s too late); testing mitigation (afterwards). Consequences of Failures Who suffers from failures? Photos: (L) epicfail.com; (R) copyright ESA/CNES/ARIANESPACE - Service Optique CSG Consequences of Failures http://hermosodia.wordpress.com/2008/10/19/definicion-visual-de-workaround/ (United States Centre for Disease Control, 04MI074) (stephen mantler at Flickr, “A runner’s injury”) Why Does Software Go Wrong? 1. Segfaults—or crashes; infinite loops too. Why Does Software Go Wrong? public int add(int x, int y) { return x - y; } 2. Wrong Output: method or module returns wrong information or has unwanted side effect. Why Does Software Go Wrong? 3. Wrong API a library can’t do what you need it to do; or subsystems don’t work together correctly....
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This note was uploaded on 03/19/2010 for the course CS 447 taught by Professor Lam during the Winter '10 term at Waterloo.

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L1 - Software Testing Quality Assurance&...

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