Transcript More On Testing

More On Testing
Why, Where, How,
When
This Lecture
NOT a lecture on testing in general
 Rather, what you need in Comp 314
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Functional Testing
Also called System Testing
 An important part of your spec
 NOT unit tests
 Provides a level of assurance of
correctness and reliability
 We WONT check this
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Unit Testing
Basically, tests API
 Can be written before the code
 Especially useful in regression testing
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Regression Testing
Tests if changes introduce bugs
 Daily builds are ideal
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Useful even if the build is currently broken
 Useful with pair programming, version
control, etc.
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TDD
Test Driven Development
 Write tests first
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Useful for clarifying the API
 Metric for how much is done
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Doesn’t work well with prototypes
 “throw one away”
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What We Require
A functional test plan
 Extensive unit tests
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What We Suggest
USE your functional test plan; write the
tests first
 After you prototype, use TDD
 Run daily builds
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How to Write Tests
Can’t write all possible test vectors
 Equivalence classification
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Edge testing
 Error “honey pots”
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Rigor
 Principle of “Maximum Drek”
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