# File lib/minitest/unit.rb, line 91 def assert_includes collection, obj, msg = nil msg = message(msg) { "Expected #{mu_pp(collection)} to include #{mu_pp(obj)}" } flip = (obj.respond_to? :include?) && ! (collection.respond_to? :include?) # HACK for specs obj, collection = collection, obj if flip assert_respond_to collection, :include? assert collection.include?(obj), msg end