flutter test --wasm support (flutter#145347)

* Adds support for `flutter test --wasm`.
  * The test compilation flow is a bit different now, so that it supports compilers other than DDC. Specifically, when we run a set of unit tests, we generate a "switchboard" main function that imports each unit test and runs the main function for a specific one based off of a value set by the JS bootstrapping code. This way, there is one compile step and the same compile output is invoked for each unit test file.
* Also, removes all references to `dart:html` from flutter/flutter.
* Adds CI steps for running the framework unit tests with dart2wasm+skwasm
  * These steps are marked as `bringup: true`, so we don't know what kind of failures they will result in. Any failures they have will not block the tree at all yet while we're still in `bringup: true`. Once this PR is merged, I plan on looking at any failures and either fixing them or disabling them so we can get these CI steps running on presubmit.

This fixes flutter#126692

.ci.yaml

@@ -1725,6 +1725,190 @@ targets:
       - bin/**
       - .ci.yaml
 
+  - name: Linux web_skwasm_tests_0
+    bringup: true
+    recipe: flutter/flutter_drone
+    timeout: 60
+    properties:
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:34v3"},
+          {"dependency": "chrome_and_driver", "version": "version:119.0.6045.9"},
+          {"dependency": "goldctl", "version": "git_revision:720a542f6fe4f92922c3b8f0fdcc4d2ac6bb83cd"}
+        ]
+      shard: web_skwasm_tests
+      subshard: "0"
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+      # Retry for flakes caused by https://github.com/flutter/flutter/issues/132654
+      presubmit_max_attempts: "2"
+    runIf:
+      - dev/**
+      - packages/**
+      - bin/**
+      - .ci.yaml
+
+  - name: Linux web_skwasm_tests_1
+    bringup: true
+    recipe: flutter/flutter_drone
+    timeout: 60
+    properties:
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:34v3"},
+          {"dependency": "chrome_and_driver", "version": "version:119.0.6045.9"},
+          {"dependency": "goldctl", "version": "git_revision:720a542f6fe4f92922c3b8f0fdcc4d2ac6bb83cd"}
+        ]
+      shard: web_skwasm_tests
+      subshard: "1"
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+      # Retry for flakes caused by https://github.com/flutter/flutter/issues/132654
+      presubmit_max_attempts: "2"
+    runIf:
+      - dev/**
+      - packages/**
+      - bin/**
+      - .ci.yaml
+
+  - name: Linux web_skwasm_tests_2
+    bringup: true
+    recipe: flutter/flutter_drone
+    timeout: 60
+    properties:
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:34v3"},
+          {"dependency": "chrome_and_driver", "version": "version:119.0.6045.9"},
+          {"dependency": "goldctl", "version": "git_revision:720a542f6fe4f92922c3b8f0fdcc4d2ac6bb83cd"}
+        ]
+      shard: web_skwasm_tests
+      subshard: "2"
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+      # Retry for flakes caused by https://github.com/flutter/flutter/issues/132654
+      presubmit_max_attempts: "2"
+    runIf:
+      - dev/**
+      - packages/**
+      - bin/**
+      - .ci.yaml
+
+  - name: Linux web_skwasm_tests_3
+    bringup: true
+    recipe: flutter/flutter_drone
+    timeout: 60
+    properties:
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:34v3"},
+          {"dependency": "chrome_and_driver", "version": "version:119.0.6045.9"},
+          {"dependency": "goldctl", "version": "git_revision:720a542f6fe4f92922c3b8f0fdcc4d2ac6bb83cd"}
+        ]
+      shard: web_skwasm_tests
+      subshard: "3"
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+      # Retry for flakes caused by https://github.com/flutter/flutter/issues/132654
+      presubmit_max_attempts: "2"
+    runIf:
+      - dev/**
+      - packages/**
+      - bin/**
+      - .ci.yaml
+
+  - name: Linux web_skwasm_tests_4
+    bringup: true
+    recipe: flutter/flutter_drone
+    timeout: 60
+    properties:
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:34v3"},
+          {"dependency": "chrome_and_driver", "version": "version:119.0.6045.9"},
+          {"dependency": "goldctl", "version": "git_revision:720a542f6fe4f92922c3b8f0fdcc4d2ac6bb83cd"}
+        ]
+      shard: web_skwasm_tests
+      subshard: "4"
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+      # Retry for flakes caused by https://github.com/flutter/flutter/issues/132654
+      presubmit_max_attempts: "2"
+    runIf:
+      - dev/**
+      - packages/**
+      - bin/**
+      - .ci.yaml
+
+  - name: Linux web_skwasm_tests_5
+    bringup: true
+    recipe: flutter/flutter_drone
+    timeout: 60
+    properties:
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:34v3"},
+          {"dependency": "chrome_and_driver", "version": "version:119.0.6045.9"},
+          {"dependency": "goldctl", "version": "git_revision:720a542f6fe4f92922c3b8f0fdcc4d2ac6bb83cd"}
+        ]
+      shard: web_skwasm_tests
+      subshard: "5"
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+      # Retry for flakes caused by https://github.com/flutter/flutter/issues/132654
+      presubmit_max_attempts: "2"
+    runIf:
+      - dev/**
+      - packages/**
+      - bin/**
+      - .ci.yaml
+
+  - name: Linux web_skwasm_tests_6
+    bringup: true
+    recipe: flutter/flutter_drone
+    timeout: 60
+    properties:
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:34v3"},
+          {"dependency": "chrome_and_driver", "version": "version:119.0.6045.9"},
+          {"dependency": "goldctl", "version": "git_revision:720a542f6fe4f92922c3b8f0fdcc4d2ac6bb83cd"}
+        ]
+      shard: web_skwasm_tests
+      subshard: "6"
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+      # Retry for flakes caused by https://github.com/flutter/flutter/issues/132654
+      presubmit_max_attempts: "2"
+    runIf:
+      - dev/**
+      - packages/**
+      - bin/**
+      - .ci.yaml
+
+  - name: Linux web_skwasm_tests_7_last
+    bringup: true
+    recipe: flutter/flutter_drone
+    timeout: 60
+    properties:
+      dependencies: >-
+        [
+          {"dependency": "android_sdk", "version": "version:34v3"},
+          {"dependency": "chrome_and_driver", "version": "version:119.0.6045.9"},
+          {"dependency": "goldctl", "version": "git_revision:720a542f6fe4f92922c3b8f0fdcc4d2ac6bb83cd"}
+        ]
+      shard: web_skwasm_tests
+      subshard: "7_last"
+      tags: >
+        ["framework", "hostonly", "shard", "linux"]
+      # Retry for flakes caused by https://github.com/flutter/flutter/issues/132654
+      presubmit_max_attempts: "2"
+    runIf:
+      - dev/**
+      - packages/**
+      - bin/**
+      - .ci.yaml
+
   - name: Linux web_tool_tests
     recipe: flutter/flutter_drone
     timeout: 60

TESTOWNERS

@@ -286,7 +286,7 @@
 /dev/devicelab/bin/tasks/technical_debt__cost.dart @HansMuller @flutter/framework
 /dev/devicelab/bin/tasks/web_benchmarks_canvaskit.dart @yjbanov @flutter/web
 /dev/devicelab/bin/tasks/web_benchmarks_html.dart @yjbanov @flutter/web
-/dev/devicelab/bin/tasks/web_benchmarks_skwasm.dart @jacksongardner @flutter/web
+/dev/devicelab/bin/tasks/web_benchmarks_skwasm.dart @eyebrowsoffire @flutter/web
 /dev/devicelab/bin/tasks/windows_home_scroll_perf__timeline_summary.dart @jonahwilliams @flutter/engine
 /dev/devicelab/bin/tasks/windows_startup_test.dart @loic-sharma @flutter/desktop
 
@@ -325,7 +325,7 @@
 # flutter_plugins @stuartmorgan @flutter/plugin
 # framework_tests @HansMuller @flutter/framework
 # fuchsia_precache @christopherfujino @flutter/tool
-# realm_checker @jacksongardner @flutter/tool
+# realm_checker @eyebrowsoffire @flutter/tool
 # skp_generator @Hixie
 # test_ownership @keyonghan
 # tool_host_cross_arch_tests @andrewkolos @flutter/tool
@@ -336,4 +336,5 @@
 # web_integration_tests @yjbanov @flutter/web
 # web_long_running_tests @yjbanov @flutter/web
 # web_tests @yjbanov @flutter/web
+# web_skwasm_tests @eyebrowsoffire @flutter/web
 # web_tool_tests @eliasyishak @flutter/tool

dev/bots/test.dart

@@ -242,6 +242,8 @@ Future<void> main(List<String> args) async {
       'web_tests': _runWebHtmlUnitTests,
       // All the unit/widget tests run using `flutter test --platform=chrome --web-renderer=canvaskit`
       'web_canvaskit_tests': _runWebCanvasKitUnitTests,
+      // All the unit/widget tests run using `flutter test --platform=chrome --wasm --web-renderer=skwasm`
+      'web_skwasm_tests': _runWebSkwasmUnitTests,
       // All web integration tests
       'web_long_running_tests': _runWebLongRunningTests,
       'flutter_plugins': _runFlutterPackagesTests,
@@ -1117,14 +1119,18 @@ Future<void> _runFrameworkCoverage() async {
 }
 
 Future<void> _runWebHtmlUnitTests() {
-  return _runWebUnitTests('html');
+  return _runWebUnitTests('html', false);
 }
 
 Future<void> _runWebCanvasKitUnitTests() {
-  return _runWebUnitTests('canvaskit');
+  return _runWebUnitTests('canvaskit', false);
 }
 
-Future<void> _runWebUnitTests(String webRenderer) async {
+Future<void> _runWebSkwasmUnitTests() {
+  return _runWebUnitTests('skwasm', true);
+}
+
+Future<void> _runWebUnitTests(String webRenderer, bool useWasm) async {
   final Map<String, ShardRunner> subshards = <String, ShardRunner>{};
 
   final Directory flutterPackageDirectory = Directory(path.join(flutterRoot, 'packages', 'flutter'));
@@ -1160,6 +1166,7 @@ Future<void> _runWebUnitTests(String webRenderer) async {
         index * testsPerShard,
         (index + 1) * testsPerShard,
       ),
+      useWasm,
     );
   }
 
@@ -1175,16 +1182,19 @@ Future<void> _runWebUnitTests(String webRenderer) async {
         (webShardCount - 1) * testsPerShard,
         allTests.length,
       ),
+      useWasm,
     );
     await _runFlutterWebTest(
       webRenderer,
       path.join(flutterRoot, 'packages', 'flutter_web_plugins'),
       <String>['test'],
+      useWasm,
     );
     await _runFlutterWebTest(
       webRenderer,
       path.join(flutterRoot, 'packages', 'flutter_driver'),
       <String>[path.join('test', 'src', 'web_tests', 'web_extension_test.dart')],
+      useWasm,
     );
   };
 
@@ -1333,11 +1343,19 @@ Future<void> _runWebLongRunningTests() async {
       'html',
       path.join(flutterRoot, 'packages', 'integration_test'),
       <String>['test/web_extension_test.dart'],
+      false,
     ),
     () => _runFlutterWebTest(
       'canvaskit',
       path.join(flutterRoot, 'packages', 'integration_test'),
       <String>['test/web_extension_test.dart'],
+      false,
+    ),
+    () => _runFlutterWebTest(
+      'skwasm',
+      path.join(flutterRoot, 'packages', 'integration_test'),
+      <String>['test/web_extension_test.dart'],
+      true,
     ),
   ];
 
@@ -2302,13 +2320,19 @@ Future<void> _runWebDebugTest(String target, {
   }
 }
 
-Future<void> _runFlutterWebTest(String webRenderer, String workingDirectory, List<String> tests) async {
+Future<void> _runFlutterWebTest(
+  String webRenderer,
+  String workingDirectory,
+  List<String> tests,
+  bool useWasm,
+) async {
   await runCommand(
     flutter,
     <String>[
       'test',
       '-v',
       '--platform=chrome',
+      if (useWasm) '--wasm',
       '--web-renderer=$webRenderer',
       '--dart-define=DART_HHH_BOT=$_runningInDartHHHBot',
       ...flutterTestArgs,

dev/integration_tests/web/lib/framework_stack_trace.dart

@@ -2,11 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:html' as html;
+import 'dart:js_interop';
 
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
 import 'package:meta/dart2js.dart';
+import 'package:web/web.dart' as web;
 
 // Tests that the framework prints stack traces in all build modes.
 //
@@ -35,10 +36,12 @@ Future<void> main() async {
   }
 
   print(output);
-  html.HttpRequest.request(
-    '/test-result',
-    method: 'POST',
-    sendData: '$output',
+  web.window.fetch(
+    '/test-result'.toJS,
+    web.RequestInit(
+      method: 'POST',
+      body: '$output'.toJS,
+    )
   );
 }
 

dev/integration_tests/web/lib/service_worker_test.dart

@@ -2,10 +2,13 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:html' as html;
+import 'dart:js_interop';
+
+import 'package:web/web.dart' as web;
+
 Future<void> main() async {
-  await html.window.navigator.serviceWorker?.ready;
-  const String response = 'CLOSE?version=1';
-  await html.HttpRequest.getString(response);
-  html.document.body?.appendHtml(response);
+  await web.window.navigator.serviceWorker.ready.toDart;
+  final JSString response = 'CLOSE?version=1'.toJS;
+  await web.window.fetch(response).toDart;
+  web.document.body?.append(response);
 }

dev/integration_tests/web/lib/service_worker_test_blocked_service_workers.dart

@@ -2,9 +2,12 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-import 'dart:html' as html;
+import 'dart:js_interop';
+
+import 'package:web/web.dart' as web;
+
 Future<void> main() async {
-  const String response = 'CLOSE?version=1';
-  await html.HttpRequest.getString(response);
-  html.document.body?.appendHtml(response);
+  final JSString response = 'CLOSE?version=1'.toJS;
+  await web.window.fetch(response).toDart;
+  web.document.body?.append(response);
 }