Improved test for camera_web regression by adding a FakeMediaTrackSettings on top of FakeMediaTrackCapabilities

Author: jalen-videotape

packages/camera/camera_web/example/integration_test/camera_service_test.dart

@@ -713,10 +713,10 @@ void main() {
             'when the facing mode setting is empty and '
             'the facingMode capability is null', (WidgetTester tester) async {
           mockVideoTrack.getSettings = () {
-            return web.MediaTrackSettings(facingMode: '');
+            return createJSInteropWrapper(FakeMediaTrackSettings())
+                as web.MediaTrackSettings;
           }.toJS;
           mockVideoTrack.getCapabilities = () {
-            // Use the fake class that has no facingMode property
             return createJSInteropWrapper(FakeMediaTrackCapabilities())
                 as web.MediaTrackCapabilities;
           }.toJS;

packages/camera/camera_web/example/integration_test/helpers/mocks.dart

@@ -11,7 +11,6 @@ import 'dart:ui';
 // ignore_for_file: implementation_imports
 import 'package:camera_web/src/camera.dart';
 import 'package:camera_web/src/camera_service.dart';
-import 'package:camera_web/src/pkg_web_tweaks.dart';
 import 'package:camera_web/src/shims/dart_js_util.dart';
 import 'package:camera_web/src/types/types.dart';
 import 'package:mockito/annotations.dart';
@@ -292,7 +291,16 @@ class MockEventStreamProvider<T extends web.Event> extends Mock
 /// the facingMode capability.
 @JSExport()
 class FakeMediaTrackCapabilities {
+  // Dummy property required by @JSExport
+  bool get dummy => true;
+}
 
+/// A fake [web.MediaTrackSettings] where facingMode is null/undefined.
+///
+/// Used to test null-safe handling when the browser doesn't provide
+/// the facingMode capability.
+@JSExport()
+class FakeMediaTrackSettings {
   // Dummy property required by @JSExport
   bool get dummy => true;
 }