Implement URL.parse()

Closes #277.

lib/URL-impl.js

@@ -6,10 +6,7 @@ const URLSearchParams = require("./URLSearchParams");
 exports.implementation = class URLImpl {
   // Unlike the spec, we duplicate some code between the constructor and canParse, because we want to give useful error
   // messages in the constructor that distinguish between the different causes of failure.
-  constructor(globalObject, constructorArgs) {
-    const url = constructorArgs[0];
-    const base = constructorArgs[1];
-
+  constructor(globalObject, [url, base]) {
     let parsedBase = null;
     if (base !== undefined) {
       parsedBase = usm.basicURLParse(base);
@@ -33,6 +30,14 @@ exports.implementation = class URLImpl {
     this._query._url = this;
   }
 
+  static parse(globalObject, input, base) {
+    try {
+      return new URLImpl(globalObject, [input, base]);
+    } catch {
+      return null;
+    }
+  }
+
   static canParse(url, base) {
     let parsedBase = null;
     if (base !== undefined) {

lib/URL.webidl

@@ -3,6 +3,7 @@
 interface URL {
   constructor(USVString url, optional USVString base);
 
+  [WebIDL2JSCallWithGlobal] static URL? parse(USVString url, optional USVString base);
   static boolean canParse(USVString url, optional USVString base);
 
   stringifier attribute USVString href;

scripts/get-latest-platform-tests.js

@@ -13,7 +13,7 @@ const path = require("path");
 // 1. Go to https://github.com/web-platform-tests/wpt/tree/master/url
 // 2. Press "y" on your keyboard to get a permalink
 // 3. Copy the commit hash
-const commitHash = "72b915d4b3754f081ef5899bf6a777efe71b2fc5";
+const commitHash = "48178346fe87222856812842fb7af7b01baa1530";
 
 const urlPrefix = `https://raw.githubusercontent.com/web-platform-tests/wpt/${commitHash}/url/`;
 const targetDir = path.resolve(__dirname, "..", "test", "web-platform-tests");
@@ -32,6 +32,7 @@ exports.directlyRunnableTests = [
   "url-searchparams.any.js",
   "url-setters-stripping.any.js",
   "url-statics-canparse.any.js",
+  "url-statics-parse.any.js",
   "url-tojson.any.js",
   "urlencoded-parser.any.js",
   "urlsearchparams-append.any.js",

test/testharness.js

@@ -29,6 +29,10 @@ module.exports = {
     assert.strictEqual(actual, expected);
   },
 
+  assert_not_equals(actual, expected) {
+    assert.notStrictEqual(actual, expected);
+  },
+
   assert_array_equals(actual, expected) {
     assert.deepStrictEqual([...actual], [...expected]);
   },