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ERROR GUESSING
 Error guessing is the preferred method used when all other
methods fail.
 Sometimes error guessing is used to test some special cases.
 Error guessing is a very practical case wherein the tester
uses his intuition, experience, knowledge of project, bug history
and makes a guess about where the bug can be.
Basic idea is to make a list of possible errors in error prone
situations and then develop the test cases.
No general procedure for this tech exists. It is an adhoc process.
Example - Special cases in the
roots of a quadratic equation
What will happen when a=0 in the quadratic
equation?
- Though, we do consider this case,
there are chances that we overlook it while
testing, as it has two cases:
• i) If a=0 then the equation is no longer
quadratic.
• ii) For calculation of roots, the division
is by zero. So, we may overlook.
 What will happen when all the inputs are
negative?
 What will happen when the inputs list is
empty?

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Error Guessing.ppt

  • 1. ERROR GUESSING  Error guessing is the preferred method used when all other methods fail.  Sometimes error guessing is used to test some special cases.  Error guessing is a very practical case wherein the tester uses his intuition, experience, knowledge of project, bug history and makes a guess about where the bug can be. Basic idea is to make a list of possible errors in error prone situations and then develop the test cases. No general procedure for this tech exists. It is an adhoc process.
  • 2. Example - Special cases in the roots of a quadratic equation What will happen when a=0 in the quadratic equation? - Though, we do consider this case, there are chances that we overlook it while testing, as it has two cases: • i) If a=0 then the equation is no longer quadratic. • ii) For calculation of roots, the division is by zero. So, we may overlook.
  • 3.  What will happen when all the inputs are negative?  What will happen when the inputs list is empty?