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rrcobb/negated_change_matcher.rb

Created January 23, 2018 00:08
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Rspec negated change matcher
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negated_change_matcher.rb
# This should be in rspec core, but add it here so we can chain negative change expectations, like
# expect { do_thing }.to change {a}.and not_change {b}.and change {b}
RSpec::Matchers.define_negated_matcher :not_change, :change
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