Poltergeist hack to silence CoreText performance notes from phantomjs that works with billy.

gistfile1.rb

module Capybara::Poltergeist
  class Client
    private
  def redirect_stdout
    prev = STDOUT.dup
    prev.autoclose = false
    $stdout = @write_io
    STDOUT.reopen(@write_io)

    prev = STDERR.dup
    prev.autoclose = false
    $stderr = @write_io
    STDERR.reopen(@write_io)
    yield
  ensure
    STDOUT.reopen(prev)
    $stdout = STDOUT
    STDERR.reopen(prev)
    $stderr = STDERR
  end
  end
end
 
class WarningSuppressor
  class << self
    def write(message)
      if message =~ /QFont::setPixelSize: Pixel size <= 0/ || message =~/CoreText performance note:/ then 0 else puts(message);1;end
    end
  end
end

Capybara.register_driver :poltergeist_billy_quite do |app|
  options = {
    phantomjs_options: [
      '--ignore-ssl-errors=yes',
      "--proxy=#{Billy.proxy.host}:#{Billy.proxy.port}"
    ],
    phantomjs_logger: WarningSuppressor
  }
  Capybara::Poltergeist::Driver.new(app, options)
end

You'll need to change the driver to :poltergeist_billy_quite.

Thanks!

❤️ ❤️ ❤️ Thank you for figuring this out and sharing! It's such a little thing but not having to see those warning messages is sooo much nicer.