TF-3034 Prevent duplicate draft warning

test/mocks/mock_web_view_platform.dart

@@ -0,0 +1,58 @@
+import 'package:flutter/widgets.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:rich_text_composer/rich_text_composer.dart';
+import 'package:plugin_platform_interface/plugin_platform_interface.dart';
+
+class MockWebViewPlatform extends InAppWebViewPlatform with MockPlatformInterfaceMixin {
+  @override
+  PlatformInAppWebViewWidget createPlatformInAppWebViewWidget(
+    PlatformInAppWebViewWidgetCreationParams params,
+  ) => MockWebViewWidget.implementation(params);
+
+  @override
+  PlatformCookieManager createPlatformCookieManager(
+    PlatformCookieManagerCreationParams params,
+  ) => MockPlatformCookieManager();
+}
+
+class MockPlatformCookieManager extends Fake implements PlatformCookieManager {
+  @override
+  Future<bool> deleteAllCookies() async {
+    return true;
+  }
+
+  @override
+  Future<bool> setCookie({
+    required WebUri url,
+    required String name,
+    required String value,
+    String path = '/',
+    String? domain,
+    int? expiresDate,
+    int? maxAge,
+    bool? isSecure,
+    bool? isHttpOnly,
+    HTTPCookieSameSitePolicy? sameSite,
+    PlatformInAppWebViewController? iosBelow11WebViewController,
+    PlatformInAppWebViewController? webViewController,
+  }) async {
+    return true;
+  }
+}
+
+class MockWebViewWidget extends PlatformInAppWebViewWidget {
+  MockWebViewWidget.implementation(super.params) : super.implementation();
+
+  @override
+  Widget build(BuildContext context) {
+    return const SizedBox.shrink();
+  }
+
+  @override
+  T controllerFromPlatform<T>(PlatformInAppWebViewController controller) {
+    throw UnimplementedError();
+  }
+
+  @override
+  void dispose() {}
+}