public function parse_url_testcases() {
    // 0: The URL, 1: The expected resulting structure.
    return array(
      array(
        self::FULL_TEST_URL,
        array(
          'scheme'   => 'http',
          'host'     => 'host.name',
          'port'     => 9090,
          'user'     => 'username',
          'pass'     => 'password',
          'path'     => '/path',
          'query'    => 'arg1=value1&arg2=value2',
          'fragment' => 'anchor',
        ),
      ),
      array(
        'http://example.com/',
        array(
          'scheme' => 'http',
          'host'   => 'example.com',
          'path'   => '/',
        ),
      ),

      // < PHP 5.4.7: Schemeless URL.
      array(
        '//example.com/path/',
        array(
          'host' => 'example.com',
          'path' => '/path/',
        ),
      ),
      array(
        '//example.com/',
        array(
          'host' => 'example.com',
          'path' => '/',
        ),
      ),
      array(
        'http://example.com//path/',
        array(
          'scheme' => 'http',
          'host'   => 'example.com',
          'path'   => '//path/',
        ),
      ),

      // < PHP 5.4.7: Scheme separator in the URL.
      array(
        'http://example.com/http://example.net/',
        array(
          'scheme' => 'http',
          'host'   => 'example.com',
          'path'   => '/http://example.net/',
        ),
      ),
      array( '/path/http://example.net/', array( 'path' => '/path/http://example.net/' ) ),

      // < PHP 5.4.7: IPv6 literals in schemeless URLs are handled incorrectly.
      array(
        '//[::FFFF::127.0.0.1]/',
        array(
          'host' => '[::FFFF::127.0.0.1]',
          'path' => '/',
        ),
      ),

      // PHP's parse_url() calls this an invalid url, we handle it as a path.
      array( '/://example.com/', array( 'path' => '/://example.com/' ) ),

      // Schemeless URL containing colons cause parse errors in PHP 7+.
      array(
        '//fonts.googleapis.com/css?family=Open+Sans:400&subset=latin',
        array(
          'host'  => 'fonts.googleapis.com',
          'path'  => '/css',
          'query' => 'family=Open+Sans:400&subset=latin',
        ),
      ),
      array(
        '//fonts.googleapis.com/css?family=Open+Sans:400',
        array(
          'host'  => 'fonts.googleapis.com',
          'path'  => '/css',
          'query' => 'family=Open+Sans:400',
        ),
      ),

      array( 'filenamefound', array( 'path' => 'filenamefound' ) ),

      // Empty string or non-string passed in.
      array( '', array( 'path' => '' ) ),
      array( 123, array( 'path' => '123' ) ),
    );
    /*
		 * Untestable edge cases in various PHP:
		 * - ///example.com - Fails in PHP >= 5.4.7, assumed path in <5.4.7
		 * - ://example.com - assumed path in PHP >= 5.4.7, fails in <5.4.7
		 */