Experimental wasm support

integration_tests/wasm/dart_test.yaml

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

integration_tests/wasm/mono_pkg.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/pubspec.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/test/hello_world_test.dart

@@ -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));
+  });
+}

pkgs/test/CHANGELOG.md

@@ -1,3 +1,10 @@
+## 1.22.0
+
+* 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/lib/src/executable.dart

@@ -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/runner/browser/browser_manager.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/dom.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/platform.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/node/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/wasm/default_settings.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'
+      ]),
+});