Although I agree that you should try to get a good coverage I wouldn't pursuit the 100% itself. Let's consider the following subroutine

sub divide {
    my ($a, $b) = @_;
    return $a / $b;
}

[download]

You can easily create a test case and get a 100% coverage, and as you might realized the code can still fail ( if $b is 0 you'll get a "Illegal division..." ), here the 100% gives you a false sense of security. On the other hand the more tests your application has the harder it is to change it or refactor it

My point is you shouldn't blindly follow best practices, they are just a guide not a law (use your own criteria). Don't use test coverage as a goal itself, otherwise you would end up writing code to get 100% coverage instead of writing code to perform a task

In reply to Re^2: Making open fail by bluescreen
in thread Making open fail by SilasTheMonk

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