require 'active_support/deprecation' module ActiveSupport module Testing module Deprecation #:nodoc: def assert_deprecated(match = nil, &block) result, warnings = collect_deprecations(&block) assert !warnings.empty?, "Expected a deprecation warning within the block but received none" if match match = Regexp.new(Regexp.escape(match)) unless match.is_a?(Regexp) assert warnings.any? { |w| w =~ match }, "No deprecation warning matched #{match}: #{warnings.join(', ')}" end result end def assert_not_deprecated(&block) result, deprecations = collect_deprecations(&block) assert deprecations.empty?, "Expected no deprecation warning within the block but received #{deprecations.size}: \n #{deprecations * "\n "}" result end private def collect_deprecations old_behavior = ActiveSupport::Deprecation.behavior deprecations = [] ActiveSupport::Deprecation.behavior = Proc.new do |message, callstack| deprecations << message end result = yield [result, deprecations] ensure ActiveSupport::Deprecation.behavior = old_behavior end end end end