[CP-beta][web] Fix failure on Firefox 148 (#182981)

flutteractionsbot · web-flow · commit e9e4fda4a7ae · 2026-02-27T04:45:15.000Z
This pull request is created by [automatic cherry pick workflow](https://github.com/flutter/flutter/blob/main/docs/releases/Flutter-Cherrypick-Process.md#automatically-creates-a-cherry-pick-request) Please fill in the form below, and a flutter domain expert will evaluate this cherry pick request. ### Issue Link: What is the link to the issue this cherry-pick is addressing? There's no issue, but we got few CI failures. ### Impact Description: What is the impact (ex. visual jank on Samsung phones, app crash, cannot ship an iOS app)? Does it impact development (ex. flutter doctor crashes when Android Studio is installed), or the shipping of production apps (the app crashes on launch). This information is for domain experts and release engineers to understand the consequences of saying yes or no to the cherry pick. Fails in CI and could block releases. ### Changelog Description: Explain this cherry pick: * In one line that is accessible to most Flutter developers. * That describes the state prior to the fix. * That includes which platforms are impacted. See [best practices](https://github.com/flutter/flutter/blob/main/docs/releases/Hotfix-Documentation-Best-Practices.md) for examples. Fix test failure that happens in Firefox 148 because they added support for TrustedTypes. ### Workaround: Is there a workaround for this issue? No workaround. ### Risk: What is the risk level of this cherry-pick? ### Test Coverage: Are you confident that your fix is well-tested by automated tests? ### Validation Steps: What are the steps to validate that this fix works? Notice no more failures in CI.
diff --git a/engine/src/flutter/lib/web_ui/test/canvaskit/canvaskit_api_tt_on_test.dart b/engine/src/flutter/lib/web_ui/test/canvaskit/canvaskit_api_tt_on_test.dart
@@ -5,13 +5,10 @@
 import 'package:test/bootstrap/browser.dart';
 import 'package:test/test.dart';
 import 'package:ui/src/engine.dart';
-import 'package:ui/ui_web/src/ui_web.dart' as ui_web;
 
 import '../common/matchers.dart';
 import 'canvaskit_api_test.dart';
 
-final bool isBlink = ui_web.browser.browserEngine == ui_web.BrowserEngine.blink;
-
 const String goodUrl = 'https://www.unpkg.com/blah-blah/33.x/canvaskit.js';
 const String badUrl = 'https://www.unpkg.com/soemthing/not-canvaskit.js';
 
@@ -42,13 +39,13 @@ void testMainWithTTOn() {
         createTrustedScriptUrl(badUrl);
       }, throwsAssertionError);
     });
-  }, skip: !isBlink);
+  }, skip: domWindow.trustedTypes == null);
 
   group('Trusted Types API NOT supported', () {
     test('createTrustedScriptUrl - returns unmodified url', () async {
       expect(createTrustedScriptUrl(badUrl), badUrl);
     });
-  }, skip: isBlink);
+  }, skip: domWindow.trustedTypes != null);
 }
 
 /// Enables Trusted Types by setting the appropriate meta tag in the DOM:
