JezK
Edit File: deprecation_matcher.rb
require 'stringio' class DeprecationMatcher def initialize(message) @message = message end def matches?(block) @actual = hijack_stderr(&block) PhraseMatcher.new("DEPRECATION WARNING: #{@message}").matches?(@actual) end def failure_message "expected deprecation warning #{@message.inspect}, got #{@actual.inspect}" end private def hijack_stderr err = $stderr $stderr = StringIO.new yield $stderr.string.rstrip ensure $stderr = err end end