Re: Code coverage tool
On 2008-02-04 22:33:44 -0500, Ian Collins <ian-news@hotmail.com> said:
Pete Becker wrote:
On 2008-02-04 14:16:35 -0500, Pete Becker <pete@versatilecoding.com> said:
On 2008-02-04 13:23:58 -0500, Ian Collins <ian-news@hotmail.com> said:
Pete Becker wrote:
On 2008-02-04 12:39:08 -0500, Erik Wikstr?m
<Erik-wikstrom@telia.com> said:
On 2008-02-04 13:32, Gerhard Fiedler wrote:
On 2008-02-04 06:55:35, Ian Collins wrote:
Write the tests first, that way nothing gets written that isn't
tested.
How do you know whether every branch/condition in a function gets
executed
when you run the tests that you wrote (independently of whether you
wrote
them before or after you wrote the function)?
Because you write the tests so that all branches will be taken. If you
can not do that it means you are not testing at a low enough level.
Or you changed some code and didn't update the tests, or the tests
missed some subtle condition that the code handles. That's why you do
coverage analysis.
If you changed some code and didn't update the tests, the tests would
fail.
Maybe, maybe not.
Then you have simply refactored the code. It that case, your tests will
still cover the new code. If they don't, you have added superfluous code.
It may or may not be superfluous, but it shows exactly what you claim
doesn't happen: that there is code that isn't covered by the tests.
--
Pete
Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The
Standard C++ Library Extensions: a Tutorial and Reference
(www.petebecker.com/tr1book)
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