From c0a06440834ba11d63667eaad32b78452ae3034f Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Sat, 18 Sep 2021 00:55:34 +0200
Subject: [PATCH 01/29] Move WPT script to test/wpt-node

---
 package.json                                        | 2 +-
 test/{run-web-platform-tests.js => wpt/node/run.js} | 6 +++---
 test/{wpt-util => wpt/shared}/filtering-reporter.js | 0
 3 files changed, 4 insertions(+), 4 deletions(-)
 rename test/{run-web-platform-tests.js => wpt/node/run.js} (97%)
 rename test/{wpt-util => wpt/shared}/filtering-reporter.js (100%)

diff --git a/package.json b/package.json
index 8b962d0..edf2bb0 100644
--- a/package.json
+++ b/package.json
@@ -39,7 +39,7 @@
   },
   "scripts": {
     "test": "npm run test:types && npm run test:unit && npm run test:wpt && npm run test:bundlers",
-    "test:wpt": "node --expose_gc ./test/run-web-platform-tests.js",
+    "test:wpt": "node --expose_gc ./test/wpt/node/run.js",
     "test:bundlers": "npm run test:rollup && npm run test:webpack",
     "test:rollup": "cd test/rollup && npm ci && npm test",
     "test:webpack": "cd test/webpack && npm ci && npm test",
diff --git a/test/run-web-platform-tests.js b/test/wpt/node/run.js
similarity index 97%
rename from test/run-web-platform-tests.js
rename to test/wpt/node/run.js
index c7a4362..b162810 100644
--- a/test/run-web-platform-tests.js
+++ b/test/wpt/node/run.js
@@ -8,7 +8,7 @@ const { promisify } = require('util');
 const micromatch = require('micromatch');
 const wptRunner = require('wpt-runner');
 const consoleReporter = require('wpt-runner/lib/console-reporter.js');
-const { FilteringReporter } = require('./wpt-util/filtering-reporter.js');
+const { FilteringReporter } = require('../shared/filtering-reporter.js');
 const allSettled = require('@ungap/promise-all-settled');
 
 const readFileAsync = promisify(fs.readFile);
@@ -128,8 +128,8 @@ async function main() {
 }
 
 async function runTests(entryFile, { excludedTests = [], ignoredFailures = {} } = {}) {
-  const entryPath = path.resolve(__dirname, `../dist/${entryFile}`);
-  const wptPath = path.resolve(__dirname, 'web-platform-tests');
+  const entryPath = path.resolve(__dirname, `../../../dist/${entryFile}`);
+  const wptPath = path.resolve(__dirname, '../../web-platform-tests');
   const testsPath = path.resolve(wptPath, 'streams');
 
   const includedTests = process.argv.length >= 3 ? process.argv.slice(2) : ['**/*.html'];
diff --git a/test/wpt-util/filtering-reporter.js b/test/wpt/shared/filtering-reporter.js
similarity index 100%
rename from test/wpt-util/filtering-reporter.js
rename to test/wpt/shared/filtering-reporter.js

From 30aebdaf796521712dd26c995d8b09ec8861944e Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Sat, 18 Sep 2021 00:58:05 +0200
Subject: [PATCH 02/29] Copy server setup from wpt-runner

---
 test/wpt/browser/server.js | 95 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 test/wpt/browser/server.js

diff --git a/test/wpt/browser/server.js b/test/wpt/browser/server.js
new file mode 100644
index 0000000..3a5d319
--- /dev/null
+++ b/test/wpt/browser/server.js
@@ -0,0 +1,95 @@
+const http = require('http');
+const path = require('path');
+const fs = require('fs');
+const { URL } = require('url');
+const st = require('st');
+const { AnyHtmlHandler, WindowHandler } = require('wpt-runner/lib/internal/serve.js');
+
+const testharnessPath = path.resolve(__dirname, '../testharness/testharness.js');
+const idlharnessPath = path.resolve(__dirname, '../testharness/idlharness.js');
+const webidl2jsPath = path.resolve(__dirname, '../testharness/webidl2/lib/webidl2.js');
+const testdriverDummyPath = path.resolve(__dirname, './testdriver-dummy.js');
+
+function setupServer(testsPath, {
+  rootURL = '/'
+}) {
+  if (!rootURL.startsWith('/')) {
+    rootURL = '/' + rootURL;
+  }
+  if (!rootURL.endsWith('/')) {
+    rootURL += '/';
+  }
+
+  const staticFileServer = st({ path: testsPath, url: rootURL, passthrough: true });
+
+  const routes = [
+    ['.window.html', new WindowHandler(testsPath, rootURL)],
+    ['.any.html', new AnyHtmlHandler(testsPath, rootURL)]
+  ];
+
+  return http.createServer((req, res) => {
+    staticFileServer(req, res, () => {
+      const { pathname } = new URL(req.url, `http://${req.headers.host}`);
+
+      for (const [pathNameSuffix, handler] of routes) {
+        if (pathname.endsWith(pathNameSuffix)) {
+          handler.handleRequest(req, res);
+          return;
+        }
+      }
+
+      switch (pathname) {
+        case '/resources/testharness.js': {
+          fs.createReadStream(testharnessPath).pipe(res);
+          break;
+        }
+
+        case '/resources/idlharness.js': {
+          fs.createReadStream(idlharnessPath).pipe(res);
+          break;
+        }
+
+        case '/resources/WebIDLParser.js': {
+          fs.createReadStream(webidl2jsPath).pipe(res);
+          break;
+        }
+
+        case '/service-workers/service-worker/resources/test-helpers.sub.js': {
+          res.end('window.service_worker_test = () => {};');
+          break;
+        }
+
+        case '/resources/testharnessreport.js': {
+          res.end('window.__setupJSDOMReporter();');
+          break;
+        }
+
+        case '/streams/resources/test-initializer.js': {
+          res.end('window.worker_test = () => {};');
+          break;
+        }
+
+        case '/resources/testharness.css': {
+          res.end('');
+          break;
+        }
+
+        case '/resources/testdriver.js': {
+          fs.createReadStream(testdriverDummyPath).pipe(res);
+          break;
+        }
+
+        case '/resources/testdriver-vendor.js': {
+          res.end('');
+          break;
+        }
+
+        default: {
+          throw new Error(`Unexpected URL: ${req.url}`);
+        }
+      }
+    });
+  }).listen();
+}
+
+exports.setupServer = setupServer;

From 8f80fd01e2966fd25ce4d918324f570ff42f11ea Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Sat, 18 Sep 2021 01:04:27 +0200
Subject: [PATCH 03/29] Fix paths

---
 test/wpt/browser/server.js | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/test/wpt/browser/server.js b/test/wpt/browser/server.js
index 3a5d319..b0d6482 100644
--- a/test/wpt/browser/server.js
+++ b/test/wpt/browser/server.js
@@ -5,10 +5,10 @@ const { URL } = require('url');
 const st = require('st');
 const { AnyHtmlHandler, WindowHandler } = require('wpt-runner/lib/internal/serve.js');
 
-const testharnessPath = path.resolve(__dirname, '../testharness/testharness.js');
-const idlharnessPath = path.resolve(__dirname, '../testharness/idlharness.js');
-const webidl2jsPath = path.resolve(__dirname, '../testharness/webidl2/lib/webidl2.js');
-const testdriverDummyPath = path.resolve(__dirname, './testdriver-dummy.js');
+const testharnessPath = path.resolve(__dirname, '../../web-platform-tests/resources/testharness.js');
+const idlharnessPath = path.resolve(__dirname, '../../web-platform-tests/resources/idlharness.js');
+const webidl2jsPath = path.resolve(__dirname, '../../web-platform-tests/resources/webidl2/lib/webidl2.js');
+const testdriverDummyPath = require.resolve('wpt-runner/lib/testdriver-dummy.js');
 
 function setupServer(testsPath, {
   rootURL = '/'

From 9e04927f512f8f040adc5c1a274ad001778a189b Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Mon, 27 Sep 2021 22:49:07 +0200
Subject: [PATCH 04/29] Move exclusions to separate file

---
 test/wpt/node/run.js          | 90 +++++------------------------------
 test/wpt/shared/exclusions.js | 83 ++++++++++++++++++++++++++++++++
 2 files changed, 95 insertions(+), 78 deletions(-)
 create mode 100644 test/wpt/shared/exclusions.js

diff --git a/test/wpt/node/run.js b/test/wpt/node/run.js
index b162810..e38fe06 100644
--- a/test/wpt/node/run.js
+++ b/test/wpt/node/run.js
@@ -10,6 +10,14 @@ const wptRunner = require('wpt-runner');
 const consoleReporter = require('wpt-runner/lib/console-reporter.js');
 const { FilteringReporter } = require('../shared/filtering-reporter.js');
 const allSettled = require('@ungap/promise-all-settled');
+const {
+  excludedTestsNonES2018,
+  excludedTestsBase,
+  ignoredFailuresBase,
+  ignoredFailuresMinified,
+  ignoredFailuresES5,
+  mergeIgnoredFailures
+} = require('../shared/exclusions');
 
 const readFileAsync = promisify(fs.readFile);
 const queueMicrotask = global.queueMicrotask || (fn => Promise.resolve().then(fn));
@@ -32,85 +40,19 @@ main().catch(e => {
 });
 
 async function main() {
-  const supportsES2018 = runtimeSupportsAsyncGenerators();
-
   const excludedTests = [
-    // We cannot polyfill TransferArrayBuffer yet, so disable tests for detached array buffers
-    // See https://github.com/MattiasBuelens/web-streams-polyfill/issues/3
-    'readable-byte-streams/bad-buffers-and-views.any.html',
-    'readable-byte-streams/enqueue-with-detached-buffer.window.html',
-    'readable-byte-streams/non-transferable-buffers.any.html',
-    // Disable tests for different size functions per realm, since they need a working <iframe>
-    'queuing-strategies-size-function-per-global.window.html',
-    // We don't implement transferable streams yet
-    'transferable/**'
+    ...excludedTestsBase,
+    ...(runtimeSupportsAsyncGenerators() ? [] : excludedTestsNonES2018)
   ];
-  const ignoredFailures = {
-    // We cannot transfer byobRequest.view.buffer after respond() or enqueue()
-    'readable-byte-streams/general.any.html': [
-      'ReadableStream with byte source: read(view) with Uint32Array, then fill it by multiple respond() calls',
-      'ReadableStream with byte source: read(view) with Uint32Array, then fill it by multiple enqueue() calls'
-    ],
-    // Same thing: the enqueued chunk will have the same buffer as branch1's chunk
-    'readable-byte-streams/tee.any.html': [
-      'ReadableStream teeing with byte source: chunks should be cloned for each branch'
-    ],
-    // Our async iterator won't extend from the built-in %AsyncIteratorPrototype%
-    'readable-streams/async-iterator.any.html': [
-      'Async iterator instances should have the correct list of properties'
-    ]
-  };
-
-  const ignoredFailuresMinified = {
-    'idlharness.any.html': [
-      // Terser turns `(a = undefined) => {}` into `(a) => {}`, changing the function's length property
-      // Therefore we cannot correctly implement methods with optional arguments
-      /interface: operation (abort|cancel|enqueue|error|getReader|write)/,
-      // Same thing for ReadableStream.values(), which is tested as part of the async iterable declaration
-      'ReadableStream interface: async iterable<any>'
-    ]
-  };
-
-  if (!supportsES2018) {
-    excludedTests.push(
-      // Skip tests that use async generators or for-await-of
-      'readable-streams/async-iterator.any.html',
-      'readable-streams/patched-global.any.html'
-    );
-  }
-
-  const ignoredFailuresES5 = merge(ignoredFailures, {
-    'idlharness.any.html': [
-      // ES5 build does not set correct length on constructors with optional arguments
-      'ReadableStream interface object length',
-      'WritableStream interface object length',
-      'TransformStream interface object length',
-      // ES5 build does not set correct length on methods with optional arguments
-      /interface: operation \w+\(.*optional.*\)/,
-      'ReadableStream interface: async iterable<any>',
-      // ES5 build does not set correct function name on getters and setters
-      /interface: attribute/,
-      // ES5 build has { writable: true } on prototype objects
-      /interface: existence and properties of interface prototype object/
-    ],
-    'queuing-strategies.any.html': [
-      // ES5 build turns arrow functions into regular functions, which cannot be marked as non-constructable
-      'ByteLengthQueuingStrategy: size should not have a prototype property',
-      'CountQueuingStrategy: size should not have a prototype property',
-      'ByteLengthQueuingStrategy: size should not be a constructor',
-      'CountQueuingStrategy: size should not be a constructor'
-    ]
-  });
 
   const results = [];
-
   results.push(await runTests('polyfill.js', {
     excludedTests,
-    ignoredFailures: merge(ignoredFailures, ignoredFailuresMinified)
+    ignoredFailures: mergeIgnoredFailures(ignoredFailuresBase, ignoredFailuresMinified)
   }));
   results.push(await runTests('polyfill.es5.js', {
     excludedTests,
-    ignoredFailures: merge(ignoredFailuresES5, ignoredFailuresMinified)
+    ignoredFailures: mergeIgnoredFailures(ignoredFailuresES5, ignoredFailuresMinified)
   }));
 
   const failures = results.reduce((sum, result) => sum + result.failures, 0);
@@ -203,11 +145,3 @@ function runtimeSupportsAsyncGenerators() {
     return false;
   }
 }
-
-function merge(left, right) {
-  const result = { ...left };
-  for (const key of Object.keys(right)) {
-    result[key] = [...(result[key] || []), ...right[key]];
-  }
-  return result;
-}
diff --git a/test/wpt/shared/exclusions.js b/test/wpt/shared/exclusions.js
new file mode 100644
index 0000000..21071a1
--- /dev/null
+++ b/test/wpt/shared/exclusions.js
@@ -0,0 +1,83 @@
+const excludedTestsBase = [
+  // We cannot polyfill TransferArrayBuffer yet, so disable tests for detached array buffers
+  // See https://github.com/MattiasBuelens/web-streams-polyfill/issues/3
+  'readable-byte-streams/bad-buffers-and-views.any.html',
+  'readable-byte-streams/enqueue-with-detached-buffer.window.html',
+  'readable-byte-streams/non-transferable-buffers.any.html',
+  // Disable tests for different size functions per realm, since they need a working <iframe>
+  'queuing-strategies-size-function-per-global.window.html',
+  // We don't implement transferable streams yet
+  'transferable/**'
+];
+
+const excludedTestsNonES2018 = [
+  // Skip tests that use async generators or for-await-of
+  'readable-streams/async-iterator.any.html',
+  'readable-streams/patched-global.any.html'
+];
+
+const ignoredFailuresBase = {
+  // We cannot transfer byobRequest.view.buffer after respond() or enqueue()
+  'readable-byte-streams/general.any.html': [
+    'ReadableStream with byte source: read(view) with Uint32Array, then fill it by multiple respond() calls',
+    'ReadableStream with byte source: read(view) with Uint32Array, then fill it by multiple enqueue() calls'
+  ],
+  // Same thing: the enqueued chunk will have the same buffer as branch1's chunk
+  'readable-byte-streams/tee.any.html': [
+    'ReadableStream teeing with byte source: chunks should be cloned for each branch'
+  ],
+  // Our async iterator won't extend from the built-in %AsyncIteratorPrototype%
+  'readable-streams/async-iterator.any.html': [
+    'Async iterator instances should have the correct list of properties'
+  ]
+};
+
+const ignoredFailuresMinified = {
+  'idlharness.any.html': [
+    // Terser turns `(a = undefined) => {}` into `(a) => {}`, changing the function's length property
+    // Therefore we cannot correctly implement methods with optional arguments
+    /interface: operation (abort|cancel|enqueue|error|getReader|write)/,
+    // Same thing for ReadableStream.values(), which is tested as part of the async iterable declaration
+    'ReadableStream interface: async iterable<any>'
+  ]
+};
+
+const ignoredFailuresES5 = mergeIgnoredFailures(ignoredFailuresBase, {
+  'idlharness.any.html': [
+    // ES5 build does not set correct length on constructors with optional arguments
+    'ReadableStream interface object length',
+    'WritableStream interface object length',
+    'TransformStream interface object length',
+    // ES5 build does not set correct length on methods with optional arguments
+    /interface: operation \w+\(.*optional.*\)/,
+    'ReadableStream interface: async iterable<any>',
+    // ES5 build does not set correct function name on getters and setters
+    /interface: attribute/,
+    // ES5 build has { writable: true } on prototype objects
+    /interface: existence and properties of interface prototype object/
+  ],
+  'queuing-strategies.any.html': [
+    // ES5 build turns arrow functions into regular functions, which cannot be marked as non-constructable
+    'ByteLengthQueuingStrategy: size should not have a prototype property',
+    'CountQueuingStrategy: size should not have a prototype property',
+    'ByteLengthQueuingStrategy: size should not be a constructor',
+    'CountQueuingStrategy: size should not be a constructor'
+  ]
+});
+
+function mergeIgnoredFailures(left, right) {
+  const result = { ...left };
+  for (const key of Object.keys(right)) {
+    result[key] = [...(result[key] || []), ...right[key]];
+  }
+  return result;
+}
+
+module.exports = {
+  excludedTestsBase,
+  excludedTestsNonES2018,
+  ignoredFailuresBase,
+  ignoredFailuresMinified,
+  ignoredFailuresES5,
+  mergeIgnoredFailures
+};

From 75dad2e1a140cd31a9880b4823e971304c930a25 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Mon, 27 Sep 2021 22:55:58 +0200
Subject: [PATCH 05/29] Run WPT in a browser

---
 package-lock.json          | 575 ++++++++++++++++---------------------
 package.json               |   3 +
 test/wpt/browser/run.js    | 185 ++++++++++++
 test/wpt/browser/server.js |   7 +-
 4 files changed, 435 insertions(+), 335 deletions(-)
 create mode 100644 test/wpt/browser/run.js

diff --git a/package-lock.json b/package-lock.json
index 0bce3b3..bb116ab 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -288,6 +288,12 @@
         "string-argv": "~0.3.1"
       }
     },
+    "@tootallnate/once": {
+      "version": "1.1.2",
+      "resolved": "https://registry.npmjs.org/@tootallnate/once/-/once-1.1.2.tgz",
+      "integrity": "sha512-RbzJvlNzmRq5c3O09UipeuXno4tA1FE6ikOjxZK0tuxVv3412l64l5t1W5pj4+rJq9vpkm/kwiR07aZXnsKPxw==",
+      "dev": true
+    },
     "@types/argparse": {
       "version": "1.0.38",
       "resolved": "https://registry.npmjs.org/@types/argparse/-/argparse-1.0.38.tgz",
@@ -312,6 +318,16 @@
       "integrity": "sha512-vhUqgjJR1qxwTWV5Ps5txuy2XMdf7Fw+OrdChRboy8BmWUPkckOhphaohzFG6b8DW7CrxaBMdrdJ47SYFq1okw==",
       "dev": true
     },
+    "@types/yauzl": {
+      "version": "2.9.2",
+      "resolved": "https://registry.npmjs.org/@types/yauzl/-/yauzl-2.9.2.tgz",
+      "integrity": "sha512-8uALY5LTvSuHgloDVUvWP3pIauILm+8/0pDMokuDYIoNsOkSwd5AiHBTSEJjKTDcZr5z8UpgOWZkxBF4iJftoA==",
+      "dev": true,
+      "optional": true,
+      "requires": {
+        "@types/node": "*"
+      }
+    },
     "@typescript-eslint/eslint-plugin": {
       "version": "4.29.3",
       "resolved": "https://registry.npmjs.org/@typescript-eslint/eslint-plugin/-/eslint-plugin-4.29.3.tgz",
@@ -434,6 +450,15 @@
       "integrity": "sha512-OPdCF6GsMIP+Az+aWfAAOEt2/+iVDKE7oy6lJ098aoe59oAmK76qV6Gw60SbZ8jHuG2wH058GF4pLFbYamYrVA==",
       "dev": true
     },
+    "agent-base": {
+      "version": "6.0.2",
+      "resolved": "https://registry.npmjs.org/agent-base/-/agent-base-6.0.2.tgz",
+      "integrity": "sha512-RZNwNclF7+MS/8bDg70amg32dyeZGZxiDuQmZxKLAlQjr3jGyLx+4Kkk58UO7D2QdgFIQCovuSuZESne6RG6XQ==",
+      "dev": true,
+      "requires": {
+        "debug": "4"
+      }
+    },
     "ajv": {
       "version": "6.12.6",
       "resolved": "https://registry.npmjs.org/ajv/-/ajv-6.12.6.tgz",
@@ -482,21 +507,6 @@
       "integrity": "sha512-HGyxoOTYUyCM6stUe6EJgnd4EoewAI7zMdfqO+kGjnlZmBDz/cR5pf8r/cR4Wq60sL/p0IkcjUEEPwS3GFrIyw==",
       "dev": true
     },
-    "asn1": {
-      "version": "0.2.4",
-      "resolved": "https://registry.npmjs.org/asn1/-/asn1-0.2.4.tgz",
-      "integrity": "sha512-jxwzQpLQjSmWXgwaCZE9Nz+glAG01yF1QnWgbhGwHI5A6FRIEY6IVqtHhIepHqI7/kyEyQEagBC5mBEFlIYvdg==",
-      "dev": true,
-      "requires": {
-        "safer-buffer": "~2.1.0"
-      }
-    },
-    "assert-plus": {
-      "version": "1.0.0",
-      "resolved": "https://registry.npmjs.org/assert-plus/-/assert-plus-1.0.0.tgz",
-      "integrity": "sha1-8S4PPF13sLHN2RRpQuTpbB5N1SU=",
-      "dev": true
-    },
     "astral-regex": {
       "version": "2.0.0",
       "resolved": "https://registry.npmjs.org/astral-regex/-/astral-regex-2.0.0.tgz",
@@ -536,18 +546,6 @@
       "integrity": "sha1-x57Zf380y48robyXkLzDZkdLS3k=",
       "dev": true
     },
-    "aws-sign2": {
-      "version": "0.7.0",
-      "resolved": "https://registry.npmjs.org/aws-sign2/-/aws-sign2-0.7.0.tgz",
-      "integrity": "sha1-tG6JCTSpWR8tL2+G1+ap8bP+dqg=",
-      "dev": true
-    },
-    "aws4": {
-      "version": "1.11.0",
-      "resolved": "https://registry.npmjs.org/aws4/-/aws4-1.11.0.tgz",
-      "integrity": "sha512-xh1Rl34h6Fi1DC2WWKfxUTVqRsNnr6LsKz2+hfwDxQJWmrx8+c7ylaqBMcHfl1U1r2dsifOvKX3LQuLNZ+XSvA==",
-      "dev": true
-    },
     "balanced-match": {
       "version": "1.0.2",
       "resolved": "https://registry.npmjs.org/balanced-match/-/balanced-match-1.0.2.tgz",
@@ -560,15 +558,6 @@
       "integrity": "sha512-AKpaYlHn8t4SVbOHCy+b5+KKgvR4vrsD8vbvrbiQJps7fKDTkjkDry6ji0rUJjC0kzbNePLwzxq8iypo41qeWA==",
       "dev": true
     },
-    "bcrypt-pbkdf": {
-      "version": "1.0.2",
-      "resolved": "https://registry.npmjs.org/bcrypt-pbkdf/-/bcrypt-pbkdf-1.0.2.tgz",
-      "integrity": "sha1-pDAdOJtqQ/m2f/PKEaP2Y342Dp4=",
-      "dev": true,
-      "requires": {
-        "tweetnacl": "^0.14.3"
-      }
-    },
     "bl": {
       "version": "4.1.0",
       "resolved": "https://registry.npmjs.org/bl/-/bl-4.1.0.tgz",
@@ -615,6 +604,12 @@
         "ieee754": "^1.1.13"
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+        "retry": "^0.12.0",
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@@ -2083,6 +1997,12 @@
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       "dev": true
     },
+    "retry": {
+      "version": "0.12.0",
+      "resolved": "https://registry.npmjs.org/retry/-/retry-0.12.0.tgz",
+      "integrity": "sha1-G0KmJmoh8HQh0bC1S33BZ7AcATs=",
+      "dev": true
+    },
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@@ -2182,6 +2102,12 @@
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+    "signal-exit": {
+      "version": "3.0.4",
+      "resolved": "https://registry.npmjs.org/signal-exit/-/signal-exit-3.0.4.tgz",
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+      "dev": true
+    },
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@@ -2253,23 +2179,6 @@
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-      "resolved": "https://registry.npmjs.org/sshpk/-/sshpk-1.16.1.tgz",
-      "integrity": "sha512-HXXqVUq7+pcKeLqqZj6mHFUMvXtOJt1uoUx09pFW6011inTMxqI8BA8PM95myrIyyKwdnzjdFjLiE6KBPVtJIg==",
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-        "getpass": "^0.1.1",
-        "jsbn": "~0.1.0",
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@@ -2284,11 +2193,22 @@
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-      "resolved": "https://registry.npmjs.org/stealthy-require/-/stealthy-require-1.1.1.tgz",
-      "integrity": "sha1-NbCYdbT/SfJqd35QmzCQoyJr8ks=",
-      "dev": true
+    "stack-utils": {
+      "version": "2.0.5",
+      "resolved": "https://registry.npmjs.org/stack-utils/-/stack-utils-2.0.5.tgz",
+      "integrity": "sha512-xrQcmYhOsn/1kX+Vraq+7j4oE2j/6BFscZ0etmYg81xuM8Gq0022Pxb8+IqgOFUIaxHs0KaSb7T1+OegiNrNFA==",
+      "dev": true,
+      "requires": {
+        "escape-string-regexp": "^2.0.0"
+      },
+      "dependencies": {
+        "escape-string-regexp": {
+          "version": "2.0.0",
+          "resolved": "https://registry.npmjs.org/escape-string-regexp/-/escape-string-regexp-2.0.0.tgz",
+          "integrity": "sha512-UpzcLCXolUWcNu5HtVMHYdXJjArjsF9C0aNnquZYY4uW/Vu0miy5YoWvbV345HauVvcAUnpRuhMMcqTcGOY2+w==",
+          "dev": true
+        }
+      }
     },
     "string-argv": {
       "version": "0.3.1",
@@ -2432,9 +2352,9 @@
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-      "resolved": "https://registry.npmjs.org/tr46/-/tr46-2.0.2.tgz",
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+      "version": "2.1.0",
+      "resolved": "https://registry.npmjs.org/tr46/-/tr46-2.1.0.tgz",
+      "integrity": "sha512-15Ih7phfcdP5YxqiB+iDtLoaTz4Nd35+IiAv0kQ5FNKHzXgdWqPoTIqEDDJmXceQt4JZk6lVPT8lnDlPpGDppw==",
       "dev": true,
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         "punycode": "^2.1.1"
@@ -2463,21 +2383,6 @@
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-      "resolved": "https://registry.npmjs.org/tunnel-agent/-/tunnel-agent-0.6.0.tgz",
-      "integrity": "sha1-J6XeoGs2sEoKmWZ3SykIaPD8QP0=",
-      "dev": true,
-      "requires": {
-        "safe-buffer": "^5.0.1"
-      }
-    },
-    "tweetnacl": {
-      "version": "0.14.5",
-      "resolved": "https://registry.npmjs.org/tweetnacl/-/tweetnacl-0.14.5.tgz",
-      "integrity": "sha1-WuaBd/GS1EViadEIr6k/+HQ/T2Q=",
-      "dev": true
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       "resolved": "https://registry.npmjs.org/type-check/-/type-check-0.4.0.tgz",
@@ -2520,12 +2425,6 @@
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-      "resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",
-      "integrity": "sha512-HjSDRw6gZE5JMggctHBcjVak08+KEVhSIiDzFnT9S9aegmp85S/bReBVTb4QTFaRNptJ9kuYaNhnbNEOkbKb/A==",
-      "dev": true
-    },
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       "resolved": "https://registry.npmjs.org/v8-compile-cache/-/v8-compile-cache-2.3.0.tgz",
@@ -2538,17 +2437,6 @@
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       "dev": true
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-    "verror": {
-      "version": "1.10.0",
-      "resolved": "https://registry.npmjs.org/verror/-/verror-1.10.0.tgz",
-      "integrity": "sha1-OhBcoXBTr1XW4nDB+CiGguGNpAA=",
-      "dev": true,
-      "requires": {
-        "assert-plus": "^1.0.0",
-        "core-util-is": "1.0.2",
-        "extsprintf": "^1.2.0"
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       "resolved": "https://registry.npmjs.org/w3c-hr-time/-/w3c-hr-time-1.0.2.tgz",
@@ -2589,13 +2477,13 @@
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-      "version": "8.5.0",
-      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-8.5.0.tgz",
-      "integrity": "sha512-fy+R77xWv0AiqfLl4nuGUlQ3/6b5uNfQ4WAbGQVMYshCTCCPK9psC1nWh3XHuxGVCtlcDDQPQW1csmmIQo+fwg==",
+      "version": "8.7.0",
+      "resolved": "https://registry.npmjs.org/whatwg-url/-/whatwg-url-8.7.0.tgz",
+      "integrity": "sha512-gAojqb/m9Q8a5IV96E3fHJM70AzCkgt4uXYX2O7EmuyOnLrViCQlsEBmF9UQIu3/aeAIp2U17rtbpZWNntQqdg==",
       "dev": true,
       "requires": {
         "lodash": "^4.7.0",
-        "tr46": "^2.0.2",
+        "tr46": "^2.1.0",
         "webidl-conversions": "^6.1.0"
       }
     },
@@ -2679,9 +2567,9 @@
       "dev": true
     },
     "ws": {
-      "version": "7.4.6",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-7.4.6.tgz",
-      "integrity": "sha512-YmhHDO4MzaDLB+M9ym/mDA5z0naX8j7SIlT8f8z+I0VtzsRbekxEutHSme7NPS2qE8StCYQNUnfWdXta/Yu85A==",
+      "version": "7.5.5",
+      "resolved": "https://registry.npmjs.org/ws/-/ws-7.5.5.tgz",
+      "integrity": "sha512-BAkMFcAzl8as1G/hArkxOxq3G7pjUqQ3gzYbLL0/5zNkph70e+lCoxBGnm6AW1+/aiNeV4fnKqZ8m4GZewmH2w==",
       "dev": true
     },
     "xml-name-validator": {
@@ -2724,11 +2612,30 @@
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     },
     "yargs-parser": {
-      "version": "20.2.7",
-      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.7.tgz",
-      "integrity": "sha512-FiNkvbeHzB/syOjIUxFDCnhSfzAL8R5vs40MgLFBorXACCOAEaWu0gRZl14vG8MR9AOJIZbmkjhusqBYZ3HTHw==",
+      "version": "20.2.9",
+      "resolved": "https://registry.npmjs.org/yargs-parser/-/yargs-parser-20.2.9.tgz",
+      "integrity": "sha512-y11nGElTIV+CT3Zv9t7VKl+Q3hTQoT9a1Qzezhhl6Rp21gJ/IVTW7Z3y9EWXhuUBC2Shnf+DX0antecpAwSP8w==",
       "dev": true
     },
+    "yauzl": {
+      "version": "2.10.0",
+      "resolved": "https://registry.npmjs.org/yauzl/-/yauzl-2.10.0.tgz",
+      "integrity": "sha1-x+sXyT4RLLEIb6bY5R+wZnt5pfk=",
+      "dev": true,
+      "requires": {
+        "buffer-crc32": "~0.2.3",
+        "fd-slicer": "~1.1.0"
+      }
+    },
+    "yazl": {
+      "version": "2.5.1",
+      "resolved": "https://registry.npmjs.org/yazl/-/yazl-2.5.1.tgz",
+      "integrity": "sha512-phENi2PLiHnHb6QBVot+dJnaAZ0xosj7p3fWl+znIjBDlnMI2PsZCJZ306BPTFOaHf5qdDEI8x5qFrSOBN5vrw==",
+      "dev": true,
+      "requires": {
+        "buffer-crc32": "~0.2.3"
+      }
+    },
     "z-schema": {
       "version": "3.18.4",
       "resolved": "https://registry.npmjs.org/z-schema/-/z-schema-3.18.4.tgz",
diff --git a/package.json b/package.json
index edf2bb0..923b487 100644
--- a/package.json
+++ b/package.json
@@ -40,6 +40,7 @@
   "scripts": {
     "test": "npm run test:types && npm run test:unit && npm run test:wpt && npm run test:bundlers",
     "test:wpt": "node --expose_gc ./test/wpt/node/run.js",
+    "test:wpt-browser": "node ./test/wpt/browser/run.js",
     "test:bundlers": "npm run test:rollup && npm run test:webpack",
     "test:rollup": "cd test/rollup && npm ci && npm test",
     "test:webpack": "cd test/webpack && npm ci && npm test",
@@ -91,6 +92,8 @@
     "eslint": "^7.32.0",
     "jasmine": "^3.9.0",
     "micromatch": "^4.0.4",
+    "playwright": "^1.14.1",
+    "recursive-readdir": "^2.2.2",
     "rollup": "^2.56.3",
     "rollup-plugin-terser": "^7.0.2",
     "tslib": "^2.3.0",
diff --git a/test/wpt/browser/run.js b/test/wpt/browser/run.js
new file mode 100644
index 0000000..6740707
--- /dev/null
+++ b/test/wpt/browser/run.js
@@ -0,0 +1,185 @@
+/* eslint-disable no-console */
+
+const path = require('path');
+const http = require('http');
+const { promisify } = require('util');
+const micromatch = require('micromatch');
+const { chromium } = require('playwright');
+const recursiveReadDir = require('recursive-readdir');
+const { setupServer } = require('./server.js');
+const consoleReporter = require('wpt-runner/lib/console-reporter.js');
+const { SourceFile } = require('wpt-runner/lib/internal/sourcefile.js');
+const { FilteringReporter } = require('../shared/filtering-reporter.js');
+const {
+  excludedTestsBase,
+  mergeIgnoredFailures,
+  ignoredFailuresBase,
+  ignoredFailuresMinified,
+  ignoredFailuresES5
+} = require('../shared/exclusions');
+
+const serverCloseAsync = promisify(http.Server.prototype.close);
+const recursiveReadDirAsync = promisify(recursiveReadDir);
+
+main().catch(e => {
+  console.error(e.stack);
+  process.exitCode = 1;
+});
+
+async function main() {
+  const excludedTests = [...excludedTestsBase];
+
+  const results = [];
+  results.push(await runTests('polyfill.js', {
+    excludedTests,
+    ignoredFailures: mergeIgnoredFailures(ignoredFailuresBase, ignoredFailuresMinified)
+  }));
+  results.push(await runTests('polyfill.es5.js', {
+    excludedTests,
+    ignoredFailures: mergeIgnoredFailures(ignoredFailuresES5, ignoredFailuresMinified)
+  }));
+
+  const failures = results.reduce((sum, result) => sum + result.failures, 0);
+  for (const { entryFile, testResults } of results) {
+    console.log(`> ${entryFile}`);
+    console.log(`  * ${testResults.passed} passed`);
+    console.log(`  * ${testResults.failed} failed`);
+    console.log(`  * ${testResults.ignored} ignored`);
+  }
+
+  process.exitCode = failures;
+}
+
+async function runTests(entryFile, { excludedTests = [], ignoredFailures = {} } = {}) {
+  const entryPath = path.resolve(__dirname, `../../../dist/${entryFile}`);
+  const wptPath = path.resolve(__dirname, '../../web-platform-tests');
+  const testsBase = '/streams/';
+  const testsPath = path.resolve(wptPath, 'streams');
+
+  const includedTests = process.argv.length >= 3 ? process.argv.slice(2) : ['**/*.html'];
+  const includeMatcher = micromatch.matcher(includedTests);
+  const excludeMatcher = micromatch.matcher(excludedTests);
+  const workerTestPattern = /\.(?:dedicated|shared|service)worker(?:\.https)?\.html$/;
+  const testPaths = (await readTestPaths(testsPath)).filter(testPath => {
+    // Ignore the worker versions
+    if (workerTestPattern.test(testPath)) {
+      return false;
+    }
+    return includeMatcher(testPath) && !excludeMatcher(testPath);
+  });
+
+  const reporter = new FilteringReporter(consoleReporter, ignoredFailures);
+
+  console.log(`>>> ${entryFile}`);
+
+  let server;
+  let browser;
+  try {
+    server = setupServer(wptPath, { rootURL: '/' });
+    const urlPrefix = `http://127.0.0.1:${server.address().port}`;
+    console.log(`Server running at ${urlPrefix}`);
+
+    browser = await chromium.launch();
+    const context = await browser.newContext();
+    await context.addInitScript({ path: entryPath });
+    await context.route(`${urlPrefix}/resources/testharnessreport.js`, route => {
+      route.fulfill({
+        body: `
+            window.fetch_tests_from_worker = () => undefined;
+            window.add_result_callback(window.__wptResultCallback);
+            window.add_completion_callback(window.__wptCompletionCallback);
+          `
+      });
+    });
+
+    for (const testPath of testPaths) {
+      reporter.startSuite(testPath);
+      const page = await context.newPage();
+      const testUrl = `${urlPrefix}${testsBase}${testPath}`;
+      await runTest(page, testUrl, reporter);
+      await page.close();
+    }
+  } finally {
+    if (browser) {
+      await browser.close();
+    }
+    if (server) {
+      await serverCloseAsync.call(server);
+    }
+  }
+
+  const wptFailures = 0;
+  const testResults = reporter.getResults();
+  const failures = Math.max(testResults.failed, wptFailures - testResults.ignored);
+
+  console.log();
+
+  return { entryFile, failures, testResults };
+}
+
+async function runTest(page, testUrl, reporter) {
+  let hasFailed = false;
+  let resolveDone;
+  const donePromise = new Promise(resolve => {
+    resolveDone = resolve;
+  });
+
+  await page.exposeFunction('__wptResultCallback', test => {
+    if (test.status === 0) {
+      reporter.pass(test.name);
+    } else if (test.status === 1) {
+      reporter.fail(`${test.name}\n`);
+      reporter.reportStack(`${test.message}\n${test.stack}`);
+      hasFailed = true;
+    } else if (test.status === 2) {
+      reporter.fail(`${test.name} (timeout)\n`);
+      reporter.reportStack(`${test.message}\n${test.stack}`);
+      hasFailed = true;
+    } else if (test.status === 3) {
+      reporter.fail(`${test.name} (incomplete)\n`);
+      reporter.reportStack(`${test.message}\n${test.stack}`);
+      hasFailed = true;
+    } else if (test.status === 4) {
+      reporter.fail(`${test.name} (precondition failed)\n`);
+      reporter.reportStack(`${test.message}\n${test.stack}`);
+      hasFailed = true;
+    } else {
+      reporter.fail(`unknown test status: ${test.status}`);
+      hasFailed = true;
+    }
+  });
+
+  await page.exposeFunction('__wptCompletionCallback', (tests, harnessStatus) => {
+    if (harnessStatus.status === 0) {
+      resolveDone(!hasFailed);
+    } else if (harnessStatus.status === 1) {
+      reporter.fail('test harness threw unexpected error');
+      reporter.reportStack(`${harnessStatus.message}\n${harnessStatus.stack}`);
+      resolveDone(false);
+    } else if (harnessStatus.status === 2) {
+      reporter.fail('test harness should not timeout');
+      resolveDone(false);
+    } else if (harnessStatus.status === 4) {
+      reporter.fail('test harness precondition failed');
+      reporter.reportStack(`${harnessStatus.message}\n${harnessStatus.stack}`);
+      resolveDone(false);
+    } else {
+      reporter.fail(`unknown test harness status: ${harnessStatus.status}`);
+      resolveDone(false);
+    }
+  });
+
+  await page.goto(testUrl);
+  return await donePromise;
+}
+
+function readTestPaths(testsPath) {
+  return recursiveReadDirAsync(testsPath).then(fileNames => {
+    const testFilePaths = [];
+    for (const fileName of fileNames) {
+      const sourceFile = new SourceFile(testsPath, path.relative(testsPath, fileName));
+      testFilePaths.push(...sourceFile.testPaths());
+    }
+    return testFilePaths.sort();
+  });
+}
diff --git a/test/wpt/browser/server.js b/test/wpt/browser/server.js
index b0d6482..3bffb4b 100644
--- a/test/wpt/browser/server.js
+++ b/test/wpt/browser/server.js
@@ -60,7 +60,7 @@ function setupServer(testsPath, {
         }
 
         case '/resources/testharnessreport.js': {
-          res.end('window.__setupJSDOMReporter();');
+          res.end('');
           break;
         }
 
@@ -84,6 +84,11 @@ function setupServer(testsPath, {
           break;
         }
 
+        case '/favicon.ico': {
+          res.end('');
+          break;
+        }
+
         default: {
           throw new Error(`Unexpected URL: ${req.url}`);
         }

From b85a000a7972de8046011eca87a973fd83d41384 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Mon, 27 Sep 2021 23:00:54 +0200
Subject: [PATCH 06/29] Tweak CLI argument handling

---
 test/wpt/browser/run.js | 6 ++++--
 test/wpt/node/run.js    | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/test/wpt/browser/run.js b/test/wpt/browser/run.js
index 6740707..82047f9 100644
--- a/test/wpt/browser/run.js
+++ b/test/wpt/browser/run.js
@@ -27,14 +27,17 @@ main().catch(e => {
 });
 
 async function main() {
+  const includedTests = process.argv.length >= 3 ? process.argv.slice(2) : ['**/*.html'];
   const excludedTests = [...excludedTestsBase];
 
   const results = [];
   results.push(await runTests('polyfill.js', {
+    includedTests,
     excludedTests,
     ignoredFailures: mergeIgnoredFailures(ignoredFailuresBase, ignoredFailuresMinified)
   }));
   results.push(await runTests('polyfill.es5.js', {
+    includedTests,
     excludedTests,
     ignoredFailures: mergeIgnoredFailures(ignoredFailuresES5, ignoredFailuresMinified)
   }));
@@ -50,13 +53,12 @@ async function main() {
   process.exitCode = failures;
 }
 
-async function runTests(entryFile, { excludedTests = [], ignoredFailures = {} } = {}) {
+async function runTests(entryFile, { includedTests = ['**/*.html'], excludedTests = [], ignoredFailures = {} } = {}) {
   const entryPath = path.resolve(__dirname, `../../../dist/${entryFile}`);
   const wptPath = path.resolve(__dirname, '../../web-platform-tests');
   const testsBase = '/streams/';
   const testsPath = path.resolve(wptPath, 'streams');
 
-  const includedTests = process.argv.length >= 3 ? process.argv.slice(2) : ['**/*.html'];
   const includeMatcher = micromatch.matcher(includedTests);
   const excludeMatcher = micromatch.matcher(excludedTests);
   const workerTestPattern = /\.(?:dedicated|shared|service)worker(?:\.https)?\.html$/;
diff --git a/test/wpt/node/run.js b/test/wpt/node/run.js
index e38fe06..d1f0a2f 100644
--- a/test/wpt/node/run.js
+++ b/test/wpt/node/run.js
@@ -40,6 +40,7 @@ main().catch(e => {
 });
 
 async function main() {
+  const includedTests = process.argv.length >= 3 ? process.argv.slice(2) : ['**/*.html'];
   const excludedTests = [
     ...excludedTestsBase,
     ...(runtimeSupportsAsyncGenerators() ? [] : excludedTestsNonES2018)
@@ -47,10 +48,12 @@ async function main() {
 
   const results = [];
   results.push(await runTests('polyfill.js', {
+    includedTests,
     excludedTests,
     ignoredFailures: mergeIgnoredFailures(ignoredFailuresBase, ignoredFailuresMinified)
   }));
   results.push(await runTests('polyfill.es5.js', {
+    includedTests,
     excludedTests,
     ignoredFailures: mergeIgnoredFailures(ignoredFailuresES5, ignoredFailuresMinified)
   }));
@@ -69,12 +72,11 @@ async function main() {
   process.exitCode = failures;
 }
 
-async function runTests(entryFile, { excludedTests = [], ignoredFailures = {} } = {}) {
+async function runTests(entryFile, { includedTests = ['**/*.html'], excludedTests = [], ignoredFailures = {} } = {}) {
   const entryPath = path.resolve(__dirname, `../../../dist/${entryFile}`);
   const wptPath = path.resolve(__dirname, '../../web-platform-tests');
   const testsPath = path.resolve(wptPath, 'streams');
 
-  const includedTests = process.argv.length >= 3 ? process.argv.slice(2) : ['**/*.html'];
   const includeMatcher = micromatch.matcher(includedTests);
   const excludeMatcher = micromatch.matcher(excludedTests);
   const workerTestPattern = /\.(?:dedicated|shared|service)worker(?:\.https)?\.html$/;

From 9be6a11b124466a2eb5ad4760a81eef4bd740fd8 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Mon, 27 Sep 2021 23:10:20 +0200
Subject: [PATCH 07/29] Tweak

---
 test/wpt/browser/run.js | 17 ++++++++---------
 1 file changed, 8 insertions(+), 9 deletions(-)

diff --git a/test/wpt/browser/run.js b/test/wpt/browser/run.js
index 82047f9..56f507d 100644
--- a/test/wpt/browser/run.js
+++ b/test/wpt/browser/run.js
@@ -175,13 +175,12 @@ async function runTest(page, testUrl, reporter) {
   return await donePromise;
 }
 
-function readTestPaths(testsPath) {
-  return recursiveReadDirAsync(testsPath).then(fileNames => {
-    const testFilePaths = [];
-    for (const fileName of fileNames) {
-      const sourceFile = new SourceFile(testsPath, path.relative(testsPath, fileName));
-      testFilePaths.push(...sourceFile.testPaths());
-    }
-    return testFilePaths.sort();
-  });
+async function readTestPaths(testsPath) {
+  const fileNames = await recursiveReadDirAsync(testsPath);
+  const testFilePaths = [];
+  for (const fileName of fileNames) {
+    const sourceFile = new SourceFile(testsPath, path.relative(testsPath, fileName));
+    testFilePaths.push(...sourceFile.testPaths());
+  }
+  return testFilePaths.sort();
 }

From 233e15e407a8a56d94ff51ddb42b1abeee32aa88 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Mon, 27 Sep 2021 23:26:22 +0200
Subject: [PATCH 08/29] Speed up by only sending used properties

---
 test/wpt/browser/run.js | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/test/wpt/browser/run.js b/test/wpt/browser/run.js
index 56f507d..57797cb 100644
--- a/test/wpt/browser/run.js
+++ b/test/wpt/browser/run.js
@@ -88,8 +88,12 @@ async function runTests(entryFile, { includedTests = ['**/*.html'], excludedTest
       route.fulfill({
         body: `
             window.fetch_tests_from_worker = () => undefined;
-            window.add_result_callback(window.__wptResultCallback);
-            window.add_completion_callback(window.__wptCompletionCallback);
+            window.add_result_callback(({ name, status, message, stack }) => {
+              window.__wptResultCallback({ name, status, message, stack });
+            });
+            window.add_completion_callback((tests, { status, message, stack }) => {
+              window.__wptCompletionCallback({ status, message, stack });
+            });
           `
       });
     });
@@ -151,7 +155,7 @@ async function runTest(page, testUrl, reporter) {
     }
   });
 
-  await page.exposeFunction('__wptCompletionCallback', (tests, harnessStatus) => {
+  await page.exposeFunction('__wptCompletionCallback', harnessStatus => {
     if (harnessStatus.status === 0) {
       resolveDone(!hasFailed);
     } else if (harnessStatus.status === 1) {

From 670927a8d84875f530f94f6d56461baf1e819331 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 00:06:27 +0200
Subject: [PATCH 09/29] Use wpt-runner's version of testharness.js

---
 test/wpt/browser/server.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/wpt/browser/server.js b/test/wpt/browser/server.js
index 3bffb4b..f04897b 100644
--- a/test/wpt/browser/server.js
+++ b/test/wpt/browser/server.js
@@ -5,9 +5,9 @@ const { URL } = require('url');
 const st = require('st');
 const { AnyHtmlHandler, WindowHandler } = require('wpt-runner/lib/internal/serve.js');
 
-const testharnessPath = path.resolve(__dirname, '../../web-platform-tests/resources/testharness.js');
-const idlharnessPath = path.resolve(__dirname, '../../web-platform-tests/resources/idlharness.js');
-const webidl2jsPath = path.resolve(__dirname, '../../web-platform-tests/resources/webidl2/lib/webidl2.js');
+const testharnessPath = require.resolve('wpt-runner/testharness/testharness.js');
+const idlharnessPath = require.resolve('wpt-runner/testharness/idlharness.js');
+const webidl2jsPath = require.resolve('wpt-runner/testharness/webidl2/lib/webidl2.js');
 const testdriverDummyPath = require.resolve('wpt-runner/lib/testdriver-dummy.js');
 
 function setupServer(testsPath, {

From 857ade203132dd880534c5e332ee23710ae01cd4 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 00:07:04 +0200
Subject: [PATCH 10/29] Use own overrides over static file server

---
 test/wpt/browser/server.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/test/wpt/browser/server.js b/test/wpt/browser/server.js
index f04897b..e70ab39 100644
--- a/test/wpt/browser/server.js
+++ b/test/wpt/browser/server.js
@@ -28,7 +28,6 @@ function setupServer(testsPath, {
   ];
 
   return http.createServer((req, res) => {
-    staticFileServer(req, res, () => {
       const { pathname } = new URL(req.url, `http://${req.headers.host}`);
 
       for (const [pathNameSuffix, handler] of routes) {
@@ -90,10 +89,11 @@ function setupServer(testsPath, {
         }
 
         default: {
-          throw new Error(`Unexpected URL: ${req.url}`);
+          staticFileServer(req, res, () => {
+            throw new Error(`Unexpected URL: ${req.url}`);
+          });
         }
       }
-    });
   }).listen();
 }
 

From 1a8017df7dbeded4e1998c59ea48557a8a2f720e Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 00:07:25 +0200
Subject: [PATCH 11/29] Fix indentation

---
 test/wpt/browser/server.js | 124 ++++++++++++++++++-------------------
 1 file changed, 62 insertions(+), 62 deletions(-)

diff --git a/test/wpt/browser/server.js b/test/wpt/browser/server.js
index e70ab39..e49b45f 100644
--- a/test/wpt/browser/server.js
+++ b/test/wpt/browser/server.js
@@ -28,72 +28,72 @@ function setupServer(testsPath, {
   ];
 
   return http.createServer((req, res) => {
-      const { pathname } = new URL(req.url, `http://${req.headers.host}`);
+    const { pathname } = new URL(req.url, `http://${req.headers.host}`);
 
-      for (const [pathNameSuffix, handler] of routes) {
-        if (pathname.endsWith(pathNameSuffix)) {
-          handler.handleRequest(req, res);
-          return;
-        }
+    for (const [pathNameSuffix, handler] of routes) {
+      if (pathname.endsWith(pathNameSuffix)) {
+        handler.handleRequest(req, res);
+        return;
       }
+    }
 
-      switch (pathname) {
-        case '/resources/testharness.js': {
-          fs.createReadStream(testharnessPath).pipe(res);
-          break;
-        }
-
-        case '/resources/idlharness.js': {
-          fs.createReadStream(idlharnessPath).pipe(res);
-          break;
-        }
-
-        case '/resources/WebIDLParser.js': {
-          fs.createReadStream(webidl2jsPath).pipe(res);
-          break;
-        }
-
-        case '/service-workers/service-worker/resources/test-helpers.sub.js': {
-          res.end('window.service_worker_test = () => {};');
-          break;
-        }
-
-        case '/resources/testharnessreport.js': {
-          res.end('');
-          break;
-        }
-
-        case '/streams/resources/test-initializer.js': {
-          res.end('window.worker_test = () => {};');
-          break;
-        }
-
-        case '/resources/testharness.css': {
-          res.end('');
-          break;
-        }
-
-        case '/resources/testdriver.js': {
-          fs.createReadStream(testdriverDummyPath).pipe(res);
-          break;
-        }
-
-        case '/resources/testdriver-vendor.js': {
-          res.end('');
-          break;
-        }
-
-        case '/favicon.ico': {
-          res.end('');
-          break;
-        }
-
-        default: {
-          staticFileServer(req, res, () => {
-            throw new Error(`Unexpected URL: ${req.url}`);
-          });
-        }
+    switch (pathname) {
+      case '/resources/testharness.js': {
+        fs.createReadStream(testharnessPath).pipe(res);
+        break;
       }
+
+      case '/resources/idlharness.js': {
+        fs.createReadStream(idlharnessPath).pipe(res);
+        break;
+      }
+
+      case '/resources/WebIDLParser.js': {
+        fs.createReadStream(webidl2jsPath).pipe(res);
+        break;
+      }
+
+      case '/service-workers/service-worker/resources/test-helpers.sub.js': {
+        res.end('window.service_worker_test = () => {};');
+        break;
+      }
+
+      case '/resources/testharnessreport.js': {
+        res.end('');
+        break;
+      }
+
+      case '/streams/resources/test-initializer.js': {
+        res.end('window.worker_test = () => {};');
+        break;
+      }
+
+      case '/resources/testharness.css': {
+        res.end('');
+        break;
+      }
+
+      case '/resources/testdriver.js': {
+        fs.createReadStream(testdriverDummyPath).pipe(res);
+        break;
+      }
+
+      case '/resources/testdriver-vendor.js': {
+        res.end('');
+        break;
+      }
+
+      case '/favicon.ico': {
+        res.end('');
+        break;
+      }
+
+      default: {
+        staticFileServer(req, res, () => {
+          throw new Error(`Unexpected URL: ${req.url}`);
+        });
+      }
+    }
   }).listen();
 }
 

From 1f0146440ffdec470513c102969f2fb925300dbc Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 00:10:31 +0200
Subject: [PATCH 12/29] Remove unused URLs

---
 test/wpt/browser/server.js | 15 ---------------
 1 file changed, 15 deletions(-)

diff --git a/test/wpt/browser/server.js b/test/wpt/browser/server.js
index e49b45f..cbf216c 100644
--- a/test/wpt/browser/server.js
+++ b/test/wpt/browser/server.js
@@ -53,26 +53,11 @@ function setupServer(testsPath, {
         break;
       }
 
-      case '/service-workers/service-worker/resources/test-helpers.sub.js': {
-        res.end('window.service_worker_test = () => {};');
-        break;
-      }
-
       case '/resources/testharnessreport.js': {
         res.end('');
         break;
       }
 
-      case '/streams/resources/test-initializer.js': {
-        res.end('window.worker_test = () => {};');
-        break;
-      }
-
-      case '/resources/testharness.css': {
-        res.end('');
-        break;
-      }
-
       case '/resources/testdriver.js': {
         fs.createReadStream(testdriverDummyPath).pipe(res);
         break;

From 9740b2ff440a5c10a6eff218217df96c1d0ee78f Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 22:50:14 +0200
Subject: [PATCH 13/29] Re-use browser instance for both test runs

---
 test/wpt/browser/run.js | 43 ++++++++++++++++++++++++++---------------
 1 file changed, 27 insertions(+), 16 deletions(-)

diff --git a/test/wpt/browser/run.js b/test/wpt/browser/run.js
index 57797cb..9901424 100644
--- a/test/wpt/browser/run.js
+++ b/test/wpt/browser/run.js
@@ -31,16 +31,28 @@ async function main() {
   const excludedTests = [...excludedTestsBase];
 
   const results = [];
-  results.push(await runTests('polyfill.js', {
-    includedTests,
-    excludedTests,
-    ignoredFailures: mergeIgnoredFailures(ignoredFailuresBase, ignoredFailuresMinified)
-  }));
-  results.push(await runTests('polyfill.es5.js', {
-    includedTests,
-    excludedTests,
-    ignoredFailures: mergeIgnoredFailures(ignoredFailuresES5, ignoredFailuresMinified)
-  }));
+  let browser;
+  try {
+    browser = await chromium.launch();
+    results.push(await runTests({
+      entryFile: 'polyfill.js',
+      includedTests,
+      excludedTests,
+      ignoredFailures: mergeIgnoredFailures(ignoredFailuresBase, ignoredFailuresMinified),
+      browser
+    }));
+    results.push(await runTests({
+      entryFile: 'polyfill.es5.js',
+      includedTests,
+      excludedTests,
+      ignoredFailures: mergeIgnoredFailures(ignoredFailuresES5, ignoredFailuresMinified),
+      browser
+    }));
+  } finally {
+    if (browser) {
+      await browser.close();
+    }
+  }
 
   const failures = results.reduce((sum, result) => sum + result.failures, 0);
   for (const { entryFile, testResults } of results) {
@@ -53,7 +65,7 @@ async function main() {
   process.exitCode = failures;
 }
 
-async function runTests(entryFile, { includedTests = ['**/*.html'], excludedTests = [], ignoredFailures = {} } = {}) {
+async function runTests({ entryFile, includedTests, excludedTests, ignoredFailures, browser }) {
   const entryPath = path.resolve(__dirname, `../../../dist/${entryFile}`);
   const wptPath = path.resolve(__dirname, '../../web-platform-tests');
   const testsBase = '/streams/';
@@ -75,14 +87,13 @@ async function runTests(entryFile, { includedTests = ['**/*.html'], excludedTest
   console.log(`>>> ${entryFile}`);
 
   let server;
-  let browser;
+  let context;
   try {
     server = setupServer(wptPath, { rootURL: '/' });
     const urlPrefix = `http://127.0.0.1:${server.address().port}`;
     console.log(`Server running at ${urlPrefix}`);
 
-    browser = await chromium.launch();
-    const context = await browser.newContext();
+    context = await browser.newContext();
     await context.addInitScript({ path: entryPath });
     await context.route(`${urlPrefix}/resources/testharnessreport.js`, route => {
       route.fulfill({
@@ -106,8 +117,8 @@ async function runTests(entryFile, { includedTests = ['**/*.html'], excludedTest
       await page.close();
     }
   } finally {
-    if (browser) {
-      await browser.close();
+    if (context) {
+      await context.close();
     }
     if (server) {
       await serverCloseAsync.call(server);

From 98d1030a2f5db274c2dad1dd8490096341bdb2d0 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 22:55:07 +0200
Subject: [PATCH 14/29] Re-use server across test runs

---
 test/wpt/browser/run.js | 34 +++++++++++++++-------------------
 1 file changed, 15 insertions(+), 19 deletions(-)

diff --git a/test/wpt/browser/run.js b/test/wpt/browser/run.js
index 9901424..4f567ae 100644
--- a/test/wpt/browser/run.js
+++ b/test/wpt/browser/run.js
@@ -30,28 +30,34 @@ async function main() {
   const includedTests = process.argv.length >= 3 ? process.argv.slice(2) : ['**/*.html'];
   const excludedTests = [...excludedTestsBase];
 
+  const wptPath = path.resolve(__dirname, '../../web-platform-tests');
   const results = [];
+  let server;
   let browser;
   try {
+    server = setupServer(wptPath, { rootURL: '/' });
+    const urlPrefix = `http://127.0.0.1:${server.address().port}`;
+    console.log(`Server running at ${urlPrefix}`);
+
     browser = await chromium.launch();
+    const testOptions = { includedTests, excludedTests, browser, wptPath, urlPrefix };
     results.push(await runTests({
+      ...testOptions,
       entryFile: 'polyfill.js',
-      includedTests,
-      excludedTests,
-      ignoredFailures: mergeIgnoredFailures(ignoredFailuresBase, ignoredFailuresMinified),
-      browser
+      ignoredFailures: mergeIgnoredFailures(ignoredFailuresBase, ignoredFailuresMinified)
     }));
     results.push(await runTests({
+      ...testOptions,
       entryFile: 'polyfill.es5.js',
-      includedTests,
-      excludedTests,
-      ignoredFailures: mergeIgnoredFailures(ignoredFailuresES5, ignoredFailuresMinified),
-      browser
+      ignoredFailures: mergeIgnoredFailures(ignoredFailuresES5, ignoredFailuresMinified)
     }));
   } finally {
     if (browser) {
       await browser.close();
     }
+    if (server) {
+      await serverCloseAsync.call(server);
+    }
   }
 
   const failures = results.reduce((sum, result) => sum + result.failures, 0);
@@ -65,9 +71,8 @@ async function main() {
   process.exitCode = failures;
 }
 
-async function runTests({ entryFile, includedTests, excludedTests, ignoredFailures, browser }) {
+async function runTests({ entryFile, includedTests, excludedTests, ignoredFailures, browser, wptPath, urlPrefix }) {
   const entryPath = path.resolve(__dirname, `../../../dist/${entryFile}`);
-  const wptPath = path.resolve(__dirname, '../../web-platform-tests');
   const testsBase = '/streams/';
   const testsPath = path.resolve(wptPath, 'streams');
 
@@ -86,13 +91,8 @@ async function runTests({ entryFile, includedTests, excludedTests, ignoredFailur
 
   console.log(`>>> ${entryFile}`);
 
-  let server;
   let context;
   try {
-    server = setupServer(wptPath, { rootURL: '/' });
-    const urlPrefix = `http://127.0.0.1:${server.address().port}`;
-    console.log(`Server running at ${urlPrefix}`);
-
     context = await browser.newContext();
     await context.addInitScript({ path: entryPath });
     await context.route(`${urlPrefix}/resources/testharnessreport.js`, route => {
@@ -108,7 +108,6 @@ async function runTests({ entryFile, includedTests, excludedTests, ignoredFailur
           `
       });
     });
-
     for (const testPath of testPaths) {
       reporter.startSuite(testPath);
       const page = await context.newPage();
@@ -120,9 +119,6 @@ async function runTests({ entryFile, includedTests, excludedTests, ignoredFailur
     if (context) {
       await context.close();
     }
-    if (server) {
-      await serverCloseAsync.call(server);
-    }
   }
 
   const wptFailures = 0;

From 315a51ed35b5eaed8c9545a5d63939a3f82850ae Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:09:44 +0200
Subject: [PATCH 15/29] Allow running in Chromium and Firefox

---
 package-lock.json       |  6 ++++++
 package.json            |  4 +++-
 test/wpt/browser/run.js | 22 +++++++++++++++++++---
 3 files changed, 28 insertions(+), 4 deletions(-)

diff --git a/package-lock.json b/package-lock.json
index bb116ab..94123d4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1738,6 +1738,12 @@
         "brace-expansion": "^1.1.7"
       }
     },
+    "minimist": {
+      "version": "1.2.5",
+      "resolved": "https://registry.npmjs.org/minimist/-/minimist-1.2.5.tgz",
+      "integrity": "sha512-FM9nNUYrRBAELZQT3xeZQ7fmMOBg6nWNmJKTcgsJeaLstP/UODVpGsr5OhXhhXg6f+qtJ8uiZ+PUxkDWcgIXLw==",
+      "dev": true
+    },
     "ms": {
       "version": "2.1.2",
       "resolved": "https://registry.npmjs.org/ms/-/ms-2.1.2.tgz",
diff --git a/package.json b/package.json
index 923b487..f805413 100644
--- a/package.json
+++ b/package.json
@@ -40,7 +40,8 @@
   "scripts": {
     "test": "npm run test:types && npm run test:unit && npm run test:wpt && npm run test:bundlers",
     "test:wpt": "node --expose_gc ./test/wpt/node/run.js",
-    "test:wpt-browser": "node ./test/wpt/browser/run.js",
+    "test:wpt:chromium": "node ./test/wpt/browser/run.js --browser chromium",
+    "test:wpt:firefox": "node ./test/wpt/browser/run.js --browser firefox",
     "test:bundlers": "npm run test:rollup && npm run test:webpack",
     "test:rollup": "cd test/rollup && npm ci && npm test",
     "test:webpack": "cd test/webpack && npm ci && npm test",
@@ -92,6 +93,7 @@
     "eslint": "^7.32.0",
     "jasmine": "^3.9.0",
     "micromatch": "^4.0.4",
+    "minimist": "^1.2.5",
     "playwright": "^1.14.1",
     "recursive-readdir": "^2.2.2",
     "rollup": "^2.56.3",
diff --git a/test/wpt/browser/run.js b/test/wpt/browser/run.js
index 4f567ae..f2f84a8 100644
--- a/test/wpt/browser/run.js
+++ b/test/wpt/browser/run.js
@@ -4,7 +4,8 @@ const path = require('path');
 const http = require('http');
 const { promisify } = require('util');
 const micromatch = require('micromatch');
-const { chromium } = require('playwright');
+const { chromium, firefox } = require('playwright');
+const minimist = require('minimist');
 const recursiveReadDir = require('recursive-readdir');
 const { setupServer } = require('./server.js');
 const consoleReporter = require('wpt-runner/lib/console-reporter.js');
@@ -21,13 +22,18 @@ const {
 const serverCloseAsync = promisify(http.Server.prototype.close);
 const recursiveReadDirAsync = promisify(recursiveReadDir);
 
+const argv = minimist(process.argv.slice(2), {
+  string: ['browser']
+});
+
 main().catch(e => {
   console.error(e.stack);
   process.exitCode = 1;
 });
 
 async function main() {
-  const includedTests = process.argv.length >= 3 ? process.argv.slice(2) : ['**/*.html'];
+  const browserType = argv.browser || 'chromium';
+  const includedTests = argv._.length > 0 ? argv._ : ['**/*.html'];
   const excludedTests = [...excludedTestsBase];
 
   const wptPath = path.resolve(__dirname, '../../web-platform-tests');
@@ -39,7 +45,7 @@ async function main() {
     const urlPrefix = `http://127.0.0.1:${server.address().port}`;
     console.log(`Server running at ${urlPrefix}`);
 
-    browser = await chromium.launch();
+    browser = await browserTypeByName(browserType).launch();
     const testOptions = { includedTests, excludedTests, browser, wptPath, urlPrefix };
     results.push(await runTests({
       ...testOptions,
@@ -186,6 +192,16 @@ async function runTest(page, testUrl, reporter) {
   return await donePromise;
 }
 
+function browserTypeByName(name) {
+  switch (name) {
+    case 'firefox':
+      return firefox;
+    case 'chromium':
+    default:
+      return chromium;
+  }
+}
+
 async function readTestPaths(testsPath) {
   const fileNames = await recursiveReadDirAsync(testsPath);
   const testFilePaths = [];

From ae6c18c62170bbd75893689e80c06c0d405cd5b7 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:13:58 +0200
Subject: [PATCH 16/29] Checkout submodules at start of CI jobs

---
 .github/workflows/pull-request.yml | 1 +
 .github/workflows/push.yml         | 2 ++
 package.json                       | 1 -
 3 files changed, 3 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index dae0cdc..560d248 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -19,6 +19,7 @@ jobs:
         uses: actions/checkout@v2
         with:
           ref: ${{ github.event.pull_request.merge_commit_sha }}
+          submodules: true
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v1
         with:
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 03204c8..57aed4c 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -12,6 +12,8 @@ jobs:
     steps:
       - name: Check out commit
         uses: actions/checkout@v2
+        with:
+          submodules: true
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v1
         with:
diff --git a/package.json b/package.json
index f805413..6188dc1 100644
--- a/package.json
+++ b/package.json
@@ -45,7 +45,6 @@
     "test:bundlers": "npm run test:rollup && npm run test:webpack",
     "test:rollup": "cd test/rollup && npm ci && npm test",
     "test:webpack": "cd test/webpack && npm ci && npm test",
-    "pretest:wpt": "git submodule update --init --recursive",
     "test:types": "tsc -p ./test/types/tsconfig.json",
     "test:unit": "jasmine --config=test/unit/jasmine.json",
     "lint": "eslint \"src/**/*.ts\"",

From 9da352abad1df070a0d290b5073502df8abdb6d4 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:23:40 +0200
Subject: [PATCH 17/29] Rework test scripts

---
 package.json | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/package.json b/package.json
index 6188dc1..1d22d94 100644
--- a/package.json
+++ b/package.json
@@ -38,13 +38,14 @@
     }
   },
   "scripts": {
-    "test": "npm run test:types && npm run test:unit && npm run test:wpt && npm run test:bundlers",
-    "test:wpt": "node --expose_gc ./test/wpt/node/run.js",
+    "test": "npm run test:types && npm run test:unit && npm run test:wpt && npm run test:bundler",
+    "test:wpt": "npm run test:wpt:node && npm run test:wpt:chromium && npm run test:wpt:firefox",
+    "test:wpt:node": "node --expose_gc ./test/wpt/node/run.js",
     "test:wpt:chromium": "node ./test/wpt/browser/run.js --browser chromium",
     "test:wpt:firefox": "node ./test/wpt/browser/run.js --browser firefox",
-    "test:bundlers": "npm run test:rollup && npm run test:webpack",
-    "test:rollup": "cd test/rollup && npm ci && npm test",
-    "test:webpack": "cd test/webpack && npm ci && npm test",
+    "test:bundler": "npm run test:bundler:rollup && npm run test:bundler:webpack",
+    "test:bundler:rollup": "cd test/rollup && npm ci && npm test",
+    "test:bundler:webpack": "cd test/webpack && npm ci && npm test",
     "test:types": "tsc -p ./test/types/tsconfig.json",
     "test:unit": "jasmine --config=test/unit/jasmine.json",
     "lint": "eslint \"src/**/*.ts\"",

From 8b56f3880bf9f431155d554f84c7a51deb0065aa Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:42:48 +0200
Subject: [PATCH 18/29] Run browser tests on CI

---
 .github/workflows/pull-request.yml | 41 ++++++++++++++++++++++++++----
 .github/workflows/push.yml         | 35 +++++++++++++++++++++----
 2 files changed, 66 insertions(+), 10 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 560d248..6f82031 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -1,7 +1,7 @@
 name: Build pull request
 on: [pull_request]
 jobs:
-  build:
+  test-node:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -24,7 +24,38 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
-      - name: npm install and test
-        run: |
-          npm install
-          npm test
+      - run: npm install
+        env:
+          PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
+      - run: npm test:types
+      - run: npm test:unit
+      - run: npm test:wpt:node
+      - run: npm test:bundler
+
+  test-browser:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: [14.x]
+        browser: [chromium, firefox]
+    if: |
+      !(
+        (github.event.action == 'opened' || github.event.action == 'reopened' || github.event.action == 'synchronize')
+        && !github.event.pull_request.draft
+        && !github.event.pull_request.merged
+        && github.event.pull_request.merge_commit_sha != null
+      )
+    steps:
+      - name: Check out merge commit of pull request
+        uses: actions/checkout@v2
+        with:
+          ref: ${{ github.event.pull_request.merge_commit_sha }}
+          submodules: true
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npx playwright install-deps ${{ matrix.browser }}
+      - run: npm test:wpt:${{ matrix.browser }}
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 57aed4c..0097b19 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -1,7 +1,7 @@
 name: Build on push
 on: [push]
 jobs:
-  build:
+  test-node:
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -18,7 +18,32 @@ jobs:
         uses: actions/setup-node@v1
         with:
           node-version: ${{ matrix.node-version }}
-      - name: npm install and test
-        run: |
-          npm install
-          npm test
+      - run: npm install
+        env:
+          PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
+      - run: npm test:types
+      - run: npm test:unit
+      - run: npm test:wpt:node
+      - run: npm test:bundler
+
+  test-browser:
+    runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        node-version: [14.x]
+        browser: [chromium, firefox]
+    if: |
+      !contains(github.event.head_commit.message, '[skip ci]')
+    steps:
+      - name: Check out commit
+        uses: actions/checkout@v2
+        with:
+          submodules: true
+      - name: Use Node.js ${{ matrix.node-version }}
+        uses: actions/setup-node@v1
+        with:
+          node-version: ${{ matrix.node-version }}
+      - run: npm install
+      - run: npx playwright install-deps ${{ matrix.browser }}
+      - run: npm test:wpt:${{ matrix.browser }}

From e2d4e5ff730c6618098f6df3bec2150997065e2f Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:44:24 +0200
Subject: [PATCH 19/29] Use actions/setup-node@v2

---
 .github/workflows/pull-request.yml | 8 ++++----
 .github/workflows/push.yml         | 8 ++++----
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 6f82031..4932aff 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [12, 14]
     # Run only on non-merged non-draft mergeable pull requests
     if: |
       !(
@@ -21,7 +21,7 @@ jobs:
           ref: ${{ github.event.pull_request.merge_commit_sha }}
           submodules: true
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install
@@ -37,7 +37,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [14.x]
+        node-version: [14]
         browser: [chromium, firefox]
     if: |
       !(
@@ -53,7 +53,7 @@ jobs:
           ref: ${{ github.event.pull_request.merge_commit_sha }}
           submodules: true
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 0097b19..a98583b 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12.x, 14.x]
+        node-version: [12, 14]
     # Skip job if commit message contains "[skip ci]"
     if: |
       !contains(github.event.head_commit.message, '[skip ci]')
@@ -15,7 +15,7 @@ jobs:
         with:
           submodules: true
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install
@@ -31,7 +31,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [14.x]
+        node-version: [14]
         browser: [chromium, firefox]
     if: |
       !contains(github.event.head_commit.message, '[skip ci]')
@@ -41,7 +41,7 @@ jobs:
         with:
           submodules: true
       - name: Use Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v1
+        uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
       - run: npm install

From 8013796c72d44f76552c34b54d0009cce34f0ad9 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:47:16 +0200
Subject: [PATCH 20/29] Cache npm dependencies

---
 .github/workflows/pull-request.yml | 2 ++
 .github/workflows/push.yml         | 2 ++
 2 files changed, 4 insertions(+)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 4932aff..902927a 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -24,6 +24,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
+          cache: npm
       - run: npm install
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
@@ -56,6 +57,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
+          cache: npm
       - run: npm install
       - run: npx playwright install-deps ${{ matrix.browser }}
       - run: npm test:wpt:${{ matrix.browser }}
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index a98583b..0681f24 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -18,6 +18,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
+          cache: npm
       - run: npm install
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
@@ -44,6 +45,7 @@ jobs:
         uses: actions/setup-node@v2
         with:
           node-version: ${{ matrix.node-version }}
+          cache: npm
       - run: npm install
       - run: npx playwright install-deps ${{ matrix.browser }}
       - run: npm test:wpt:${{ matrix.browser }}

From 06a6b0e6a39bf6bdc6c7572c00ad0f2be3ab3307 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:48:45 +0200
Subject: [PATCH 21/29] Simplify

---
 .github/workflows/pull-request.yml | 5 ++---
 .github/workflows/push.yml         | 5 ++---
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 902927a..696d0a5 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -38,7 +38,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [14]
         browser: [chromium, firefox]
     if: |
       !(
@@ -53,10 +52,10 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.merge_commit_sha }}
           submodules: true
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Use Node.js 14
         uses: actions/setup-node@v2
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 14
           cache: npm
       - run: npm install
       - run: npx playwright install-deps ${{ matrix.browser }}
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 0681f24..b250b65 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -32,7 +32,6 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        node-version: [14]
         browser: [chromium, firefox]
     if: |
       !contains(github.event.head_commit.message, '[skip ci]')
@@ -41,10 +40,10 @@ jobs:
         uses: actions/checkout@v2
         with:
           submodules: true
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Use Node.js 14
         uses: actions/setup-node@v2
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 14
           cache: npm
       - run: npm install
       - run: npx playwright install-deps ${{ matrix.browser }}

From 17c61fc47d2ca182c9c2fd30dc7068906ac32dc7 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:49:17 +0200
Subject: [PATCH 22/29] Fix typos

---
 .github/workflows/pull-request.yml | 10 +++++-----
 .github/workflows/push.yml         | 10 +++++-----
 2 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 696d0a5..12239bb 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -28,10 +28,10 @@ jobs:
       - run: npm install
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
-      - run: npm test:types
-      - run: npm test:unit
-      - run: npm test:wpt:node
-      - run: npm test:bundler
+      - run: npm run test:types
+      - run: npm run test:unit
+      - run: npm run test:wpt:node
+      - run: npm run test:bundler
 
   test-browser:
     runs-on: ubuntu-latest
@@ -59,4 +59,4 @@ jobs:
           cache: npm
       - run: npm install
       - run: npx playwright install-deps ${{ matrix.browser }}
-      - run: npm test:wpt:${{ matrix.browser }}
+      - run: npm run test:wpt:${{ matrix.browser }}
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index b250b65..7bd9578 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -22,10 +22,10 @@ jobs:
       - run: npm install
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
-      - run: npm test:types
-      - run: npm test:unit
-      - run: npm test:wpt:node
-      - run: npm test:bundler
+      - run: npm run test:types
+      - run: npm run test:unit
+      - run: npm run test:wpt:node
+      - run: npm run test:bundler
 
   test-browser:
     runs-on: ubuntu-latest
@@ -47,4 +47,4 @@ jobs:
           cache: npm
       - run: npm install
       - run: npx playwright install-deps ${{ matrix.browser }}
-      - run: npm test:wpt:${{ matrix.browser }}
+      - run: npm run test:wpt:${{ matrix.browser }}

From 0c8c08869763e39ddb7c064152acf70d05c8cdb0 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:54:50 +0200
Subject: [PATCH 23/29] Install only a single browser

---
 .github/workflows/pull-request.yml | 4 +++-
 .github/workflows/push.yml         | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 12239bb..9b0a172 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -58,5 +58,7 @@ jobs:
           node-version: 14
           cache: npm
       - run: npm install
-      - run: npx playwright install-deps ${{ matrix.browser }}
+        env:
+          PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
+      - run: npx playwright install --with-deps ${{ matrix.browser }}
       - run: npm run test:wpt:${{ matrix.browser }}
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 7bd9578..5169fcf 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -46,5 +46,7 @@ jobs:
           node-version: 14
           cache: npm
       - run: npm install
-      - run: npx playwright install-deps ${{ matrix.browser }}
+        env:
+          PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
+      - run: npx playwright install --with-deps ${{ matrix.browser }}
       - run: npm run test:wpt:${{ matrix.browser }}

From e14f4584eaf7b4bb7efc581503b2fe6d376fa505 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Tue, 28 Sep 2021 23:55:20 +0200
Subject: [PATCH 24/29] Use npm ci

---
 .github/workflows/pull-request.yml | 4 ++--
 .github/workflows/push.yml         | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 9b0a172..f49b975 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -25,7 +25,7 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
           cache: npm
-      - run: npm install
+      - run: npm ci
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
       - run: npm run test:types
@@ -57,7 +57,7 @@ jobs:
         with:
           node-version: 14
           cache: npm
-      - run: npm install
+      - run: npm ci
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
       - run: npx playwright install --with-deps ${{ matrix.browser }}
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 5169fcf..8f69ac0 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -19,7 +19,7 @@ jobs:
         with:
           node-version: ${{ matrix.node-version }}
           cache: npm
-      - run: npm install
+      - run: npm ci
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
       - run: npm run test:types
@@ -45,7 +45,7 @@ jobs:
         with:
           node-version: 14
           cache: npm
-      - run: npm install
+      - run: npm ci
         env:
           PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
       - run: npx playwright install --with-deps ${{ matrix.browser }}

From ddcab4aad1deed6e1bf1374dd87685badd064cfc Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Wed, 29 Sep 2021 00:42:17 +0200
Subject: [PATCH 25/29] Only run Node 14 tests on merge commits of pull
 requests

The "pull_request" workflow acts more as a "sanity check"
that the PR branch is sufficiently up-to-date with the base branch.

We leave the real heavy lifting over to the "push" workflow.
---
 .github/workflows/pull-request.yml | 32 +-----------------------------
 1 file changed, 1 insertion(+), 31 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index f49b975..6ac3391 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -5,7 +5,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        node-version: [12, 14]
+        node-version: [14]
     # Run only on non-merged non-draft mergeable pull requests
     if: |
       !(
@@ -32,33 +32,3 @@ jobs:
       - run: npm run test:unit
       - run: npm run test:wpt:node
       - run: npm run test:bundler
-
-  test-browser:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-      matrix:
-        browser: [chromium, firefox]
-    if: |
-      !(
-        (github.event.action == 'opened' || github.event.action == 'reopened' || github.event.action == 'synchronize')
-        && !github.event.pull_request.draft
-        && !github.event.pull_request.merged
-        && github.event.pull_request.merge_commit_sha != null
-      )
-    steps:
-      - name: Check out merge commit of pull request
-        uses: actions/checkout@v2
-        with:
-          ref: ${{ github.event.pull_request.merge_commit_sha }}
-          submodules: true
-      - name: Use Node.js 14
-        uses: actions/setup-node@v2
-        with:
-          node-version: 14
-          cache: npm
-      - run: npm ci
-        env:
-          PLAYWRIGHT_SKIP_BROWSER_DOWNLOAD: 1
-      - run: npx playwright install --with-deps ${{ matrix.browser }}
-      - run: npm run test:wpt:${{ matrix.browser }}

From aa8bb65ba5c8c7a95382bea6c90373ac5d0c7ef8 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Wed, 29 Sep 2021 00:47:05 +0200
Subject: [PATCH 26/29] Rename workflows and jobs

---
 .github/workflows/pull-request.yml | 3 ++-
 .github/workflows/push.yml         | 4 +++-
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 6ac3391..0a94a20 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -1,7 +1,8 @@
-name: Build pull request
+name: Test pull request
 on: [pull_request]
 jobs:
   test-node:
+    name: Node ${{ matrix.node-version }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 8f69ac0..04adad2 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -1,7 +1,8 @@
-name: Build on push
+name: Test on push
 on: [push]
 jobs:
   test-node:
+    name: Node ${{ matrix.node-version }}
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -28,6 +29,7 @@ jobs:
       - run: npm run test:bundler
 
   test-browser:
+    name: ${{ matrix.browser }}
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false

From 5c94885874ea2b581081b58cc89de60ac0d25b8d Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Wed, 29 Sep 2021 22:43:33 +0200
Subject: [PATCH 27/29] Tweak

---
 .github/workflows/pull-request.yml | 9 +++------
 1 file changed, 3 insertions(+), 6 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index 0a94a20..df1f15c 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -2,11 +2,8 @@ name: Test pull request
 on: [pull_request]
 jobs:
   test-node:
-    name: Node ${{ matrix.node-version }}
+    name: Node
     runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        node-version: [14]
     # Run only on non-merged non-draft mergeable pull requests
     if: |
       !(
@@ -21,10 +18,10 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.merge_commit_sha }}
           submodules: true
-      - name: Use Node.js ${{ matrix.node-version }}
+      - name: Use Node.js 14
         uses: actions/setup-node@v2
         with:
-          node-version: ${{ matrix.node-version }}
+          node-version: 14
           cache: npm
       - run: npm ci
         env:

From e032b4b016b4af85c02295ee2cfac2a2858e6285 Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Wed, 29 Sep 2021 22:47:21 +0200
Subject: [PATCH 28/29] Fix PR jobs not running when they should

This is awkward...
---
 .github/workflows/pull-request.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index df1f15c..e47b218 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ubuntu-latest
     # Run only on non-merged non-draft mergeable pull requests
     if: |
-      !(
+      (
         (github.event.action == 'opened' || github.event.action == 'reopened' || github.event.action == 'synchronize')
         && !github.event.pull_request.draft
         && !github.event.pull_request.merged

From 6e5d709980527c52b9e8e370e5e23b2efb51beac Mon Sep 17 00:00:00 2001
From: Mattias Buelens <mattias@buelens.com>
Date: Wed, 29 Sep 2021 22:49:41 +0200
Subject: [PATCH 29/29] Use on.<event>.types

---
 .github/workflows/pull-request.yml | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/.github/workflows/pull-request.yml b/.github/workflows/pull-request.yml
index e47b218..fd3aadf 100644
--- a/.github/workflows/pull-request.yml
+++ b/.github/workflows/pull-request.yml
@@ -1,5 +1,7 @@
 name: Test pull request
-on: [pull_request]
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, ready_for_review]
 jobs:
   test-node:
     name: Node
@@ -7,8 +9,7 @@ jobs:
     # Run only on non-merged non-draft mergeable pull requests
     if: |
       (
-        (github.event.action == 'opened' || github.event.action == 'reopened' || github.event.action == 'synchronize')
-        && !github.event.pull_request.draft
+        !github.event.pull_request.draft
         && !github.event.pull_request.merged
         && github.event.pull_request.merge_commit_sha != null
       )