gistfile1.php

<?php

  /**
   * @Given /^I send a request to google page speed for "([^"]*)" with "([^"]*)" strategy$/
   */
  public function iSendARequestToGooglePageSpeedForWithStrategy($path, $strategy) {

    if ($path === 'the homepage') {
      $url = $this->getMinkParameter('base_url');
    }
    else {
      $url = $this->getMinkParameter('base_url') . $path;
    }

    //Try google page speed up to 5 times
    for ($i=0; $i<5; $i++) {
      $this->restClient = new Client();
      $this->restClient->response = $this->restClient->get('https://www.googleapis.com/pagespeedonline/v2/runPagespeed?url=' . $url . '&filter_third_party_resources=false&strategy=' . $strategy . '&fields=ruleGroups');

      //Grab the response code from google
      $response_code = !empty($this->restClient->response->code) ? $this->restClient->response->code : FALSE;

      //Stop sending requests to google page speed if we get a valid response
      if (!empty($response_code) && $response_code == 200) {
        break;
      }
    }

    // If google does not respond, throw a PendingException.  This allows us to
    // continue executing the remaining steps without failing the whole build
    if (empty($response_code) || $response_code != 200) {
      throw new PendingException('Google did respond as with a ' . $response_code . 'code');
    }

  }

Thank you Matt! There is only one small thing. We should use:

$this->restClient->response->getStatusCode()

instead of:

$this->restClient->response->code

when we are defining $response_code variable.