Chris Dailey
Posts: 56
Nickname: mouse
Registered: Dec, 2002
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Re: Unit Testing: Don't be Fooled by the Coverage Report
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Posted: Mar 2, 2006 4:11 PM
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There is another way of being fooled by code coverage; I rarely see it mentioned.
Basically, a test setup should put the test in a particular state; then a number of operations should be performed; then the state should be tested for correct results. A test should perform a set of actions that define a transition from one state to another and then verify that state.
You could write all the tests you want, get 100% coverage, and not test the resulting state of what was executed. You could then still have bad behaving code, even though you have 100% coverage.
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