Convert WPT test harness to TS

build/wpt_test.bzl

@@ -53,7 +53,7 @@ const unitTests :Workerd.Config = (
       worker = (
         modules = [
           (name = "worker", esModule = embed "{test_js}"),
-          (name = "harness", esModule = embed "../../../../../workerd/src/wpt/harness.js"),
+          (name = "wpt:harness", esModule = embed "../../../../../workerd/src/wpt/harness.js"),
           {modules}
         ],
         bindings = [

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

@@ -2,7 +2,7 @@
 // Licensed under the Apache 2.0 license found in the LICENSE file or at:
 //     https://opensource.org/licenses/Apache-2.0
 
-import { run } from 'harness';
+import { run } from 'wpt:harness';
 
 export const idnaTestV2Window = run('IdnaTestV2.window.js');
 export const historical = run('historical.any.js', {

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

@@ -2,7 +2,7 @@
 // Licensed under the Apache 2.0 license found in the LICENSE file or at:
 //     https://opensource.org/licenses/Apache-2.0
 
-import { run } from 'harness';
+import { run } from 'wpt:harness';
 
 export const urlpatternCompareTests = run(
   'urlpattern-compare-tests.tentative.js',

src/wpt/BUILD.bazel

@@ -1,8 +1,43 @@
-filegroup(
+load("@aspect_rules_ts//ts:defs.bzl", "ts_project")
+load("@npm//:eslint/package_json.bzl", eslint_bin = "bin")
+
+srcs = glob(
+    [
+        "*.ts",
+    ],
+)
+
+ts_project(
     name = "wpt-test-harness",
-    srcs = glob(
-        include = ["**/*"],
-        allow_empty = True,
-    ),
+    testonly = False,
+    srcs = srcs,
+    allow_js = True,
+    declaration = True,
+    tsconfig = "tsconfig.json",
     visibility = ["//visibility:public"],
+    deps = [
+        "//:node_modules/@types/node",
+    ],
+)
+
+eslint_bin.eslint_test(
+    name = "wpt-test-harness@eslint",
+    size = "large",
+    args = [
+        "--config $(location {})".format("eslint.config.mjs"),
+        "--parser-options project:$(location {})".format("tsconfig.json"),
+        "-f stylish",
+        "--report-unused-disable-directives",
+    ] + ["$(location " + src + ")" for src in srcs],
+    data = srcs + [
+        "eslint.config.mjs",
+        "tsconfig.json",
+        "//:prettierrc",
+        "//tools:base-eslint",
+    ],
+    tags = ["lint"],
+    target_compatible_with = select({
+        "@platforms//os:windows": ["@platforms//:incompatible"],
+        "//conditions:default": [],
+    }),
 )

src/wpt/eslint.config.mjs

@@ -0,0 +1,3 @@
+import { baseConfig } from '../../tools/base.eslint.config.mjs';
+
+export default [...baseConfig({ tsconfigRootDir: import.meta.dirname })];