refactor(test262-runner): Pivot to test262-harness for XS parity chec…

…king

.prettierignore

@@ -3,6 +3,7 @@ bundles
 dist
 fixtures
 /packages/ses-integration-test/transform-tests/output
+/packages/test262-runner/prelude
 test262
 
 *.html

packages/test262-runner/.eslintignore

@@ -0,0 +1 @@
+prelude

packages/test262-runner/.gitignore

@@ -0,0 +1 @@
+prelude

packages/test262-runner/README.md

@@ -1,10 +1,18 @@
 # test262-runner
 
-Run ECMAScript compliance tests on `node` using native ESM support.
+Run ECMAScript compliance tests on Node.js, XS, and potentially others, with a
+prelude that shims Hardened JavaScript on these platforms.
 
 ## Test262 subset
 
-The `test262` directory contains a copy of the `tests` and `harness` directories from https://github.com/tc39/test262.
+The `test262` directory contains
+
+* a copy of the `tests` and `harness` directories from https://github.com/tc39/test262.
+* additional tests from https://github.com/Moddable-OpenSource/moddable
+* additional Hardened JavaScript tests
+
+We currently only run tests expressly marked with the `ses-xs-parity` feature
+in their front-matter.
 
 ## Justification
 

packages/test262-runner/package.json

@@ -2,24 +2,48 @@
   "name": "@endo/test262-runner",
   "version": "0.1.32",
   "private": true,
-  "description": "Test262 Runner",
-  "author": "Agoric",
+  "description": "Hardened JavaScript Test262 Runner",
+  "keywords": [],
+  "author": "Endo contributors",
   "license": "Apache-2.0",
+  "homepage": "https://github.com/endojs/endo/tree/master/packages/skel#readme",
+  "repository": {
+    "directory": "packages/test262-runner"
+  },
+  "bugs": {
+    "url": "https://github.com/endojs/endo/issues"
+  },
   "type": "module",
-  "main": "./src/main.js",
+  "main": "./index.js",
+  "module": "./index.js",
+  "exports": {
+    "./package.json": "./package.json"
+  },
   "scripts": {
-    "build": "exit 0",
+    "build": "node scripts/generate-preludes.js",
+    "lint": "yarn lint:types && yarn lint:js",
     "lint-fix": "eslint --fix .",
-    "lint": "eslint ."
+    "lint:js": "eslint .",
+    "lint:types": "tsc",
+    "test": "exit 0",
+    "test262": "yarn build && yarn test262:xs && yarn test262:node",
+    "test262:xs": "test262-harness --host-type xs --host-path xst --test262-dir test262 --prelude prelude/xs.js 'test262/test/**/*.js' --features-include ses-xs-parity",
+    "test262:node": "test262-harness --host-type node --host-path node --test262-dir test262  --prelude prelude/node.js 'test262/test/**/*.js' --features-include ses-xs-parity"
   },
   "dependencies": {
-    "test262-parser": "^2.2.0"
+    "@endo/compartment-mapper": "^1.1.0",
+    "ses": "^1.1.0",
+    "test262-harness": "^10.0.0"
   },
-  "ava": {
-    "files": [
-      "*test*/**/test-*.js"
-    ],
-    "require": []
+  "devDependencies": {
+    "babel-eslint": "^10.0.3",
+    "eslint": "^8.46.0",
+    "eslint-config-airbnb-base": "^15.0.0",
+    "eslint-config-prettier": "^8.8.0",
+    "eslint-plugin-eslint-comments": "^3.1.2",
+    "eslint-plugin-import": "^2.27.5",
+    "prettier": "^3.0.0",
+    "typescript": "~5.2.2"
   },
   "eslintConfig": {
     "extends": [

packages/test262-runner/scripts/generate-preludes.js

@@ -0,0 +1,36 @@
+/* global process */
+import 'ses';
+import fs from 'fs';
+import { makeBundle } from '@endo/compartment-mapper/bundle.js';
+import { fileURLToPath, pathToFileURL } from 'url';
+
+const resolve = (rel, abs) => fileURLToPath(new URL(rel, abs).toString());
+const root = new URL('..', import.meta.url).toString();
+
+const read = async location => fs.promises.readFile(fileURLToPath(location));
+const write = async (target, content) => {
+  const location = resolve(target, root);
+  await fs.promises.writeFile(location, content);
+};
+
+const main = async () => {
+  const nodePrelude = await makeBundle(
+    read,
+    pathToFileURL(
+      resolve('../src/node-prelude.js', import.meta.url),
+    ).toString(),
+  );
+  const xsPrelude = await makeBundle(
+    read,
+    pathToFileURL(resolve('../src/xs-prelude.js', import.meta.url)).toString(),
+  );
+
+  await fs.promises.mkdir('prelude', { recursive: true });
+  await write('prelude/node.js', nodePrelude);
+  await write('prelude/xs.js', xsPrelude);
+};
+
+main().catch(err => {
+  console.error('Error running main:', err);
+  process.exitCode = 1;
+});

packages/test262-runner/src/node-prelude.js

@@ -0,0 +1,2 @@
+import 'ses/lockdown-shim.js';
+import 'ses/compartment-shim.js';

packages/test262-runner/test262/test/built-ins/Compartment/prototype/Symbol.toStringTag-lockdown.js

@@ -0,0 +1,13 @@
+/*---
+description:
+includes: [propertyHelper.js]
+features: [Symbol.toStringTag,Compartment,lockdown,ses-xs-parity]
+---*/
+
+lockdown();
+
+assert.sameValue(Compartment.prototype[Symbol.toStringTag], 'Compartment');
+
+verifyNotEnumerable(Compartment.prototype, Symbol.toStringTag);
+verifyNotWritable(Compartment.prototype, Symbol.toStringTag);
+verifyNotConfigurable(Compartment.prototype, Symbol.toStringTag);

packages/test262-runner/test262/test/built-ins/Compartment/prototype/Symbol.toStringTag.js

@@ -1,7 +1,7 @@
 /*---
 description:
 includes: [propertyHelper.js]
-features: [Symbol.toStringTag,Compartment]
+features: [Symbol.toStringTag,Compartment,ses-xs-parity]
 ---*/
 
 assert.sameValue(Compartment.prototype[Symbol.toStringTag], 'Compartment');

packages/test262-runner/tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "extends": "../../tsconfig.eslint-base.json",
+  "compilerOptions": {
+    "allowJs": true
+  },
+  "include": [
+    "*.js",
+    "*.ts",
+    "src/**/*.js",
+    "src/**/*.ts"
+  ]
+}