[fix] Add a leading slash only if the URL is special

If the value of the `pathname` property does not start with a `/`, add
it only if the URL is special.

index.js

@@ -347,10 +347,7 @@ function Url(address, location, parser) {
  // Default to a / for pathname if none exists. This normalizes the URL
  // to always have a /
  //
- if (
- url.pathname.charAt(0) !== '/'
- && (url.hostname || url.protocol === 'file:')
- ) {
+ if (url.pathname.charAt(0) !== '/' && isSpecial(url.protocol)) {
  url.pathname = '/' + url.pathname;
  }
 

test/test.js

@@ -361,8 +361,8 @@ describe('url-parse', function () {
  url = 'foo:https://example.com';
  parsed = parse(url);
  assume(parsed.hostname).equals('example.com');
- assume(parsed.pathname).equals('/');
- assume(parsed.href).equals('foo:https://example.com/');
+ assume(parsed.pathname).equals('');
+ assume(parsed.href).equals('foo:https://example.com');
  assume(parsed.slashes).is.true();
 
  url = 'foo:https:///example.com';