On Friday, 5 August 2016 at 02:37:35 UTC, Walter Bright wrote:
In adding some overflow detection to Phobos, I discovered that
some allocations were never called by the unittests. Adding a
unittest for those paths, I discovered those paths didn't work
at all for any cases.
I'm not giving up coverage testing anytime soon, regardless of
what some study claims :-)
:)
Like I said, measuring coverage is important, what isn't is using
it as a measure of the quality of the tests themselves. The other
important thing is to decide whether or not certain lines are
worth covering, which of course you can only do if you have the
coverage data!
Mutant testing could have found those code paths you just
mentioned, BTW: you'd always get surviving mutants for those
paths.
Atila
