class Gem::TestCase

def assert_contains_make_command(target, output, msg = nil)
  if output.match(/\n/)
    msg = message(msg) {
      'Expected output containing make command "%s": %s' % [
        ('%s %s' % [make_command, target]).rstrip,
        output.inspect
      ]
    }
  else
    msg = message(msg) {
      'Expected make command "%s": %s' % [
        ('%s %s' % [make_command, target]).rstrip,
        output.inspect
      ]
    }
  end
  assert scan_make_command_lines(output).any? { |line|
    make = parse_make_command_line(line)
    if make[:targets].include?(target)
      yield make, line if block_given?
      true
    else
      false
    end
  }, msg
end