public function get_component_from_parsed_url_array_testcases() {
    // 0: A URL, 1: PHP URL constant, 2: The expected result.
    return array(
      array(
        'http://example.com/',
        -1,
        array(
          'scheme' => 'http',
          'host'   => 'example.com',
          'path'   => '/',
        ),
      ),
      array(
        'http://example.com/',
        -1,
        array(
          'scheme' => 'http',
          'host'   => 'example.com',
          'path'   => '/',
        ),
      ),
      array( 'http://example.com/', PHP_URL_HOST, 'example.com' ),
      array( 'http://example.com/', PHP_URL_USER, null ),
      array( 'http:///example.com', -1, false ),          // Malformed.
      array( 'http:///example.com', PHP_URL_HOST, null ), // Malformed.
    );
  }