POC for basic web platform test integration

Author: jasnell

Diff for: WORKSPACE

@@ -604,3 +604,14 @@ new_local_repository(
         visibility = ["//visibility:public"],)""",
     path = "empty",
 )
+
+# ========================================================================================
+# Web Platform Tests
+
+http_archive(
+    name = "wpt",
+    build_file = "//:build/BUILD.wpt",
+    integrity = "sha256-2l8wKVITBCYMflmq8qAqWvUPcCdDGwN0r+bMe93Mpww=",
+    strip_prefix = "wpt-merge_pr_47718",
+    url = "https://github.com/web-platform-tests/wpt/archive/refs/tags/merge_pr_47718.tar.gz",
+)

Diff for: build/BUILD.wpt

@@ -0,0 +1,13 @@
+exports_files([
+  "url/url-origin.any.js",
+]);
+
+filegroup(
+  name = "url",
+  srcs = glob(
+    include = ["url/**/*"],
+    allow_empty = True,
+  ),
+  visibility = ["//visibility:public"],
+)
+

Diff for: src/workerd/api/wpt/BUILD.bazel

@@ -0,0 +1,17 @@
+load("//:build/kj_test.bzl", "kj_test")
+load("//:build/wd_cc_library.bzl", "wd_cc_library")
+load("//:build/wd_test.bzl", "wd_test")
+
+[wd_test(
+    src = f,
+    args = [
+      "--experimental",
+    ],
+    data = [
+      f.removesuffix(".wd-test") + ".js",
+      "bar.txt",
+      "@wpt//:url",
+    ],
+) for f in glob(
+    ["**/*.wd-test"],
+)]

Diff for: src/workerd/api/wpt/bar.txt

@@ -0,0 +1,42 @@
+import {
+  strictEqual,
+} from 'assert';
+
+globalThis.fetch = async(url) => {
+  const { default: data } = await import(url);
+  return {
+    async json() { return data; },
+  };
+};
+
+globalThis.promise_test = (callback) => {
+  callback();
+};
+
+globalThis.assert_equals = (a, b, c) => {
+  strictEqual(a,b,c);
+};
+
+globalThis.test = (callback, message) => {
+  try {
+    callback();
+  } catch (err) {
+    const aerr = new AggregateError([err], message);
+    globalThis.errors.push(aerr);
+  }
+}
+
+globalThis.errors = [];
+
+export const test = {
+  async test(_, env) {
+    const foo = await import('url-origin.any.js');
+
+    if (globalThis.errors.length > 0) {
+      for (const err of globalThis.errors) {
+        console.error(err);
+      }
+      throw new Error('Test failed');
+    }
+  }
+};

Diff for: src/workerd/api/wpt/url-test.js

@@ -0,0 +1,28 @@
+using Workerd = import "/workerd/workerd.capnp";
+
+const unitTests :Workerd.Config = (
+  services = [
+    ( name = "url-test-test",
+      worker = (
+        modules = [
+          (name = "worker", esModule = embed "url-test.js"),
+          (name = "url-origin.any.js",
+           esModule = embed "../../../../../wpt/url/url-origin.any.js"),
+          (name = "resources/urltestdata.json",
+           json = embed "../../../../../wpt/url/resources/urltestdata.json"),
+          (name = "resources/urltestdata-javascript-only.json",
+           json = embed "../../../../../wpt/url/resources/urltestdata-javascript-only.json"),
+        ],
+        bindings = [
+          (name = "wpt", service = "wpt"),
+        ],
+        compatibilityDate = "2024-07-01",
+        compatibilityFlags = ["nodejs_compat_v2"],
+      )
+    ),
+    (
+      name = "wpt",
+      disk = ".",
+    )
+  ],
+);