url: change null password handling

Pulls in new URL parsing tests from w3c web-platform-tests and updates
null password handling.

Refs: e001240685
Refs: https://github.com/whatwg/url/pull/186
PR-URL: https://github.com/nodejs/node/pull/10601
Fixes: https://github.com/nodejs/node/issues/10595
Reviewed-By: Michal Zasso <targos@protonmail.com>
Reviewed-By: Italo A. Casas <me@italoacasas.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>

lib/internal/url.js

@@ -285,7 +285,8 @@ Object.defineProperties(URL.prototype, {
       if (ctx.host !== undefined) {
         ret += '//';
         const has_username = typeof ctx.username === 'string';
-        const has_password = typeof ctx.password === 'string';
+        const has_password = typeof ctx.password === 'string' &&
+                             ctx.password !== '';
         if (has_username || has_password) {
           if (has_username)
             ret += ctx.username;

test/fixtures/url-tests.json

@@ -32,6 +32,66 @@
     "search": "?b",
     "hash": "#c"
   },
+  {
+    "input": "https://test:@test",
+    "base": "about:blank",
+    "href": "https://test@test/",
+    "origin": "https://test",
+    "protocol": "https:",
+    "username": "test",
+    "password": "",
+    "host": "test",
+    "hostname": "test",
+    "port": "",
+    "pathname": "/",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "https://:@test",
+    "base": "about:blank",
+    "href": "https://test/",
+    "origin": "https://test",
+    "protocol": "https:",
+    "username": "",
+    "password": "",
+    "host": "test",
+    "hostname": "test",
+    "port": "",
+    "pathname": "/",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "non-special://test:@test/x",
+    "base": "about:blank",
+    "href": "non-special://test@test/x",
+    "origin": "null",
+    "protocol": "non-special:",
+    "username": "test",
+    "password": "",
+    "host": "test",
+    "hostname": "test",
+    "port": "",
+    "pathname": "/x",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "non-special://:@test/x",
+    "base": "about:blank",
+    "href": "non-special://test/x",
+    "origin": "null",
+    "protocol": "non-special:",
+    "username": "",
+    "password": "",
+    "host": "test",
+    "hostname": "test",
+    "port": "",
+    "pathname": "/x",
+    "search": "",
+    "hash": ""
+  },
   {
     "input": "http:foo.com",
     "base": "http://example.org/foo/bar",
@@ -3098,7 +3158,7 @@
   {
     "input": "http:a:@www.example.com",
     "base": "about:blank",
-    "href": "http://a:@www.example.com/",
+    "href": "http://a@www.example.com/",
     "origin": "http://www.example.com",
     "protocol": "http:",
     "username": "a",
@@ -3113,7 +3173,7 @@
   {
     "input": "http:/a:@www.example.com",
     "base": "about:blank",
-    "href": "http://a:@www.example.com/",
+    "href": "http://a@www.example.com/",
     "origin": "http://www.example.com",
     "protocol": "http:",
     "username": "a",
@@ -3128,7 +3188,7 @@
   {
     "input": "http://a:@www.example.com",
     "base": "about:blank",
-    "href": "http://a:@www.example.com/",
+    "href": "http://a@www.example.com/",
     "origin": "http://www.example.com",
     "protocol": "http:",
     "username": "a",
@@ -3173,7 +3233,7 @@
   {
     "input": "http://:@www.example.com",
     "base": "about:blank",
-    "href": "http://:@www.example.com/",
+    "href": "http://www.example.com/",
     "origin": "http://www.example.com",
     "protocol": "http:",
     "username": "",