Mixpanel hacks

javascript_tracking.rb

module JavascriptTracking
  def log_javascript_tracking
    @mixpanel_registry ||= []

    page.execute_script <<-JS
      window._eindx_cukes = {
        originalTrack: mixpanel.track,
        mixpanelRegistry: []
      };

      mixpanel.track = function() {
        var args = Array.prototype.slice.apply(arguments);
        _eindx_cukes.mixpanelRegistry.push(args);
        _eindx_cukes.originalTrack.apply(this, args);
      };
    JS

    yield

    @mixpanel_registry += page.evaluate_script <<-JS
      window._eindx_cukes.mixpanelRegistry;
    JS
  rescue Capybara::NotSupportedByDriverError
    puts 'You need to run a Javascript-capable driver! Tag your feature with @javascript.'
    raise
  end
end

World(JavascriptTracking)