Experimental wasm support (#1777)

- Adds the experimental platform `experimental-chrome-wasm`. This requires chrome beta and a very recent SDK to run.
  - This platform will be deleted eventually, and replaced with a [--compiler](#1776) flag.
- Adds `wasm` to the boolean selector variables, and an `isWasm` field to `Runtime` (defaults to false, so should be non-breaking).

Note that the integration test for this will initially be failing, as there is one more change needed from the SDK, but once that lands we can update this to point at the new location for the wasm runtime, update the min SDK, re-run the tests, and land.

Author: jakemac53

.github/workflows/dart.yml

@@ -0,0 +1 @@
+platforms: [experimental-chrome-wasm]

integration_tests/wasm/dart_test.yaml

@@ -0,0 +1,23 @@
+# See https://pub.dev/packages/mono_repo
+
+sdk:
+- main
+
+stages:
+- analyze_and_format:
+  - group:
+    - format
+    - analyze: --fatal-infos
+- unit_test:
+  - group:
+    - command:
+      - pushd /tmp
+      - wget https://dl.google.com/linux/direct/google-chrome-beta_current_amd64.deb
+      - sudo dpkg -i google-chrome-beta_current_amd64.deb
+      - popd
+      - which google-chrome-beta
+      os:
+        - linux
+    - test:
+      os:
+      - linux

integration_tests/wasm/mono_pkg.yaml

@@ -0,0 +1,12 @@
+name: wasm_tests
+environment:
+  sdk: ">=2.18.0 <3.0.0"
+dev_dependencies:
+  test: any
+dependency_overrides:
+  test:
+    path: ../../pkgs/test
+  test_api:
+    path: ../../pkgs/test_api
+  test_core:
+    path: ../../pkgs/test_core

integration_tests/wasm/pubspec.yaml

@@ -0,0 +1,11 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+@TestOn('wasm')
+import 'package:test/test.dart';
+
+void main() {
+  test('1 == 1', () {
+    expect(1, equals(1));
+  });
+}

integration_tests/wasm/test/hello_world_test.dart

@@ -1,3 +1,10 @@
+## 1.22.0-dev
+
+* Add the `experimental-chrome-wasm` platform. This is very unstable and will
+  eventually be deleted, to be replaced by a `--compiler` flag. See
+  https://github.com/dart-lang/test/issues/1776 for more information on future
+  plans.
+
 ## 1.21.7
 
 * Support `package:matcher` version `0.12.13`.

pkgs/test/CHANGELOG.md

@@ -9,6 +9,7 @@ import 'package:test_core/src/runner/hack_register_platform.dart'; // ignore: im
 
 import 'runner/browser/platform.dart';
 import 'runner/node/platform.dart';
+import 'runner/wasm/platform.dart';
 
 void main(List<String> args) async {
   registerPlatformPlugin([Runtime.nodeJS], () => NodePlatform());
@@ -18,6 +19,9 @@ void main(List<String> args) async {
     Runtime.safari,
     Runtime.internetExplorer
   ], () => BrowserPlatform.start());
+  registerPlatformPlugin([
+    Runtime.experimentalChromeWasm,
+  ], () => BrowserWasmPlatform.start());
 
   await executable.main(args);
 }

pkgs/test/lib/src/executable.dart

@@ -155,6 +155,7 @@ class BrowserManager {
       ExecutableSettings settings, Configuration configuration) {
     switch (browser.root) {
       case Runtime.chrome:
+      case Runtime.experimentalChromeWasm:
         return Chrome(url, configuration, settings: settings);
       case Runtime.firefox:
         return Firefox(url, settings: settings);

pkgs/test/lib/src/runner/browser/browser_manager.dart

@@ -21,7 +21,7 @@ extension WindowExtension on Window {
   void postMessage(Object message, String targetOrigin,
           [List<MessagePort>? messagePorts]) =>
       js_util.callMethod(this, 'postMessage', <Object?>[
-        message,
+        js_util.jsify(message),
         targetOrigin,
         if (messagePorts != null) js_util.jsify(messagePorts)
       ]);

pkgs/test/lib/src/runner/browser/dom.dart

@@ -18,8 +18,8 @@ import 'package:shelf_web_socket/shelf_web_socket.dart';
 // ignore: deprecated_member_use
 import 'package:test_api/backend.dart'
     show Runtime, StackTraceMapper, SuitePlatform;
-import 'package:test_core/src/runner/compiler_pool.dart'; // ignore: implementation_imports
 import 'package:test_core/src/runner/configuration.dart'; // ignore: implementation_imports
+import 'package:test_core/src/runner/dart2js_compiler_pool.dart'; // ignore: implementation_imports
 import 'package:test_core/src/runner/load_exception.dart'; // ignore: implementation_imports
 import 'package:test_core/src/runner/package_version.dart'; // ignore: implementation_imports
 import 'package:test_core/src/runner/platform.dart'; // ignore: implementation_imports
@@ -85,8 +85,8 @@ class BrowserPlatform extends PlatformPlugin
   /// A [PathHandler] used to serve compiled JS.
   final _jsHandler = PathHandler();
 
-  /// The [CompilerPool] managing active instances of `dart2js`.
-  final _compilers = CompilerPool();
+  /// The [Dart2JsCompilerPool] managing active instances of `dart2js`.
+  final _compilers = Dart2JsCompilerPool();
 
   /// The temporary directory in which compiled JS is emitted.
   final String? _compiledDir;

pkgs/test/lib/src/runner/browser/platform.dart

@@ -15,8 +15,8 @@ import 'package:stream_channel/stream_channel.dart';
 import 'package:test_api/backend.dart'
     show Runtime, StackTraceMapper, SuitePlatform;
 import 'package:test_core/src/runner/application_exception.dart'; // ignore: implementation_imports
-import 'package:test_core/src/runner/compiler_pool.dart'; // ignore: implementation_imports
 import 'package:test_core/src/runner/configuration.dart'; // ignore: implementation_imports
+import 'package:test_core/src/runner/dart2js_compiler_pool.dart'; // ignore: implementation_imports
 import 'package:test_core/src/runner/load_exception.dart'; // ignore: implementation_imports
 import 'package:test_core/src/runner/package_version.dart'; // ignore: implementation_imports
 import 'package:test_core/src/runner/platform.dart'; // ignore: implementation_imports
@@ -41,8 +41,8 @@ class NodePlatform extends PlatformPlugin
   /// The test runner configuration.
   final Configuration _config;
 
-  /// The [CompilerPool] managing active instances of `dart2js`.
-  final _compilers = CompilerPool(['-Dnode=true', '--server-mode']);
+  /// The [Dart2JsCompilerPool] managing active instances of `dart2js`.
+  final _compilers = Dart2JsCompilerPool(['-Dnode=true', '--server-mode']);
 
   /// The temporary directory in which compiled JS is emitted.
   final _compiledDir = createTempDir();

pkgs/test/lib/src/runner/node/platform.dart

@@ -0,0 +1,21 @@
+// Copyright (c) 2022, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+import 'dart:collection';
+
+import 'package:test_api/src/backend/runtime.dart'; // ignore: implementation_imports
+import '../executable_settings.dart';
+
+/// Default settings for starting browser executables with the wasm runtime.
+final defaultSettings = UnmodifiableMapView({
+  Runtime.experimentalChromeWasm: ExecutableSettings(
+      linuxExecutable: 'google-chrome-beta',
+      macOSExecutable: null,
+      windowsExecutable: null,
+      arguments: [
+        '--js-flags=--experimental-wasm-gc --wasm-gc-js-interop '
+            '--experimental-wasm-stack-switching '
+            '--experimental-wasm-type-reflection'
+      ]),
+});