| // Copyright 2014 The Flutter Authors. 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:async'; |
| import 'dart:convert'; |
| import 'dart:js_interop'; |
| import 'dart:js_interop_unsafe'; |
| |
| @JS('window') |
| external JSObject get _window; |
| |
| /// The web implementation of [registerWebServiceExtension]. |
| /// |
| /// Adds a hidden `window.$flutterDriver` JavaScript function that's called by |
| /// `FlutterWebDriver` to fulfill FlutterDriver commands. |
| /// |
| /// See also: |
| /// |
| /// * `_extension_io.dart`, which has the dart:io implementation |
| void registerWebServiceExtension(Future<Map<String, dynamic>> Function(Map<String, String>) callback) { |
| // Define the result variable because packages/flutter_driver/lib/src/driver/web_driver.dart |
| // checks for this value to become non-null when waiting for the result. If this value is |
| // undefined at the time of the check, WebDriver throws an exception. |
| _window.setProperty(r'$flutterDriverResult'.toJS, null); |
| |
| _window.setProperty(r'$flutterDriver'.toJS, (JSAny message) { |
| (() async { |
| try { |
| final Map<String, dynamic> messageJson = jsonDecode((message as JSString).toDart) as Map<String, dynamic>; |
| final Map<String, String> params = messageJson.cast<String, String>(); |
| final Map<String, dynamic> result = await callback(params); |
| _window.setProperty(r'$flutterDriverResult'.toJS, json.encode(result).toJS); |
| } catch (error, stackTrace) { |
| // Encode the error in the same format the FlutterDriver extension uses. |
| // See //packages/flutter_driver/lib/src/extension/extension.dart |
| _window.setProperty(r'$flutterDriverResult'.toJS, |
| json.encode(<String, dynamic>{ |
| 'isError': true, |
| 'response': '$error\n$stackTrace', |
| }).toJS |
| ); |
| } |
| })(); |
| }.toJS); |
| } |