Post a json callback request using capybara / jquery

_post_json_callback

def post_json_callback(path, payload)
  script = "jQuery.ajax({url: '#{path}', type: 'POST', data: JSON.stringify(#{payload.to_json}), contentType: 'application/json; charset=utf-8'});"
  page.execute_script(script)
end

_wait_for_ajax

def wait_for_ajax
  Timeout.timeout(::Capybara.default_wait_time) do
    loop until finished_all_ajax_requests?
  end
end

def finished_all_ajax_requests?
  page.evaluate_script('jQuery.active').zero?
end

usage

    zencoder_payload = { 
      job: { status: 'finished' },
      output: {
        id: 123,
        state: 'finished',
        thumbnails: [
            {label: "small", images: [{url: "s3://#{ENV["AWS_S3_BUCKET"]}/test/users/@user.id/videos/#{@video.id}/0000-550x413-video-1-sml-thumbnail.png"}]},
            {label: "medium", images: [{url: "s3://#{ENV["AWS_S3_BUCKET"]}/test/users/@user.id/videos/#{@video.id}/0000-550x413-video-1-med-thumbnail.png"}]},
            {label: "large", images: [{url: "s3://#{ENV["AWS_S3_BUCKET"]}/test/users/@user.id/videos/#{@video.id}/0000-550x413-video-1-lrg-thumbnail.png"}]}
        ]
      }
    }

    post_json_callback("/zencoder-callback", zencoder_payload)
    wait_for_ajax