POC for basic web platform test integration

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 = "sha256-6mp9wOEkWuACXvSDmf1pL2Dlj5ruukYwQzwkNgcpCdI=",
+ strip_prefix = "wpt-merge_pr_47718",
+ url = "https://github.com/web-platform-tests/wpt/archive/refs/tags/merge_pr_47718.tar.gz",
+)

build/BUILD.wpt

@@ -0,0 +1,8 @@
+filegroup(
+ name = "url",
+ srcs = glob(
+ include = ["url/**/*"],
+ allow_empty = True,
+ ),
+ visibility = ["//visibility:public"],
+)

src/workerd/api/wpt/BUILD.bazel

@@ -0,0 +1,12 @@
+load("//:build/wd_test.bzl", "wd_test")
+
+wd_test(
+ name = "url-test",
+ src = "url-test.wd-test",
+ args = ["--experimental"],
+ data = [
+ "url-test.js",
+ "//src/wpt:wpt-test-harness",
+ "@wpt//:url",
+ ],
+)

src/workerd/api/wpt/url-test.js

@@ -0,0 +1,23 @@
+import { strictEqual } from 'assert';
+
+// The harness has no exports of it's own but does modify the global
+// scope to include the additional stuff the Web Platform Tests expect.
+import * as harness from 'harness';
+
+export const test = {
+ async test() {
+ // The tests will be run when the module is imported. Note that
+ // there are limitations to this in that the module is not allowed
+ // to perform any I/O... so any test that requires setTimeout,
+ // for instance, will fail... this also means we cannot run
+ // fetch tests from WPT... sad face.
+ 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');
+ }
+ },
+};

src/workerd/api/wpt/url-test.wd-test

@@ -0,0 +1,30 @@
+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 = "harness",
+ esModule = embed "../../../../../workerd/src/wpt/harness.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 = ".",
+ )
+ ],
+);

src/wpt/BUILD.bazel

@@ -0,0 +1,8 @@
+filegroup(
+ name = "wpt-test-harness",
+ srcs = glob(
+ include = ["**/*"],
+ allow_empty = True,
+ ),
+ visibility = ["//visibility:public"],
+)

src/wpt/harness.js

@@ -0,0 +1,29 @@
+import { strictEqual } from 'node: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 = [];