vvlad/rspec-instrumentation-matcher — pull request #2 by ssidelnikov (2014-09-24 03:58:04+00:00)
Title: Added negative_failure_message function

If you try to use a negative matcher like

expect{subject.perform(12)}.not_to instrument('offers_loader.tender_offers_loaded')

an error occur:

undefined method `negative_failure_message' for #

This pull request adds the missing method.