I don't have a precise answer, but saw Chad Granum's YAPC 2016 presentation on Test2, and saw there are some flexible tools for mocking that may be worth investigating. Chad showed a link to the Test2 manual, but it was too fine a font to read on the video. Perhaps someone else can include it.

In reply to Re: Mocking a method defined in a Moo Role by gnosti
in thread Mocking a method defined in a Moo Role by PopeFelix

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