Behat: Logging in to accounts via email or username using drush

gistfile1.txt

/**
   * @Given I log in as :name
   */
  public function iLogInAs($name) {
    $domain = $this->getMinkParameter('base_url');
    // Pass base url to drush command.
    $uli = $this->getDriver('drush')->drush('uli', array(
      "'" . $name . "'",
      "--browser=0",
      "--uri=$domain",
    ));
    // Trim EOL characters.
    $uli = trim($uli);
    $this->getSession()->visit($uli);
  }

  /**
   * @Given I log in as user with :name email
   */
  public function iLogInAsUserWithEmail($email) {
    $domain = $this->getMinkParameter('base_url');

    // Pass base url to drush command.
    $uli = $this->getDriver('drush')->drush('uli', array(
      "--mail='$email'",
      "--browser=0",
      "--uri=$domain",
    ));

    // Trim EOL characters.
    $uli = trim($uli);
    $this->getSession()->visit($uli);
  }