File URLs with repeated slsashes

Related links
+ The URL Standard change: whatwg/url#234
+ The original bug report: whatwg/url#232

Author: watilde

url/urltestdata.json

@@ -5305,5 +5305,48 @@
     "pathname": "joe@example.org,2001:foo/bar",
     "search": "",
     "hash": ""
+  },
+  "# file URLs with repeated slsashes by Daijirō Wachi",
+  {
+    "input": "file:////////",
+    "base": "about:blank",
+    "href": "file:///",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "file:\\\\\\\\",
+    "base": "about:blank",
+    "href": "file:///",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "",
+    "search": "",
+    "hash": ""
+  },
+  {
+    "input": "file:////////foo/bar",
+    "base": "about:blank",
+    "href": "file:///foo/bar",
+    "protocol": "file:",
+    "username": "",
+    "password": "",
+    "host": "",
+    "hostname": "",
+    "port": "",
+    "pathname": "/foo/bar",
+    "search": "",
+    "hash": ""
   }
 ]