Poltergeist sliencer

poltergeist.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
  IGNORES = [
    /QFont::setPixelSize: Pixel size <= 0/,
    /CoreText performance note:/,
    /The "fb-root" div has not been created, auto-creating/
  ]

  class << self
    def write(message)
      if suppress?(message) then 0 else puts(message);1;end
    end

    private

    def suppress?(message)
      IGNORES.any? { |re| message =~ re }
    end
  end
end

Capybara.register_driver :poltergeist do |app|
  Capybara::Poltergeist::Driver.new(app, phantomjs_logger: WarningSuppressor)
end

Capybara.javascript_driver = :poltergeist