return $new->( @_ };

Since this is a test module, it may be better to use a goto, rather than just making the call to the old method. If the test module is also testing error conditions that generate messages with any sort of stack trace, then just using return could cause those tests to fail.

In reply to Re^2: Checking parameters passed to a third party module during testing (wrap) by ammon
in thread Checking parameters passed to a third party module during testing by GrandFather

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