blob: e422cc5aa19be2f0ac0fded697f1802cd9e110d9 [file] [log] [blame] [edit]
// 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:html' as html;
import 'dart:js';
import 'dart:js_util' as js_util;
/// The web implementation of [registerWebServiceExtension].
///
/// Adds a hidden `window.$flutterDriver` JavaScript function that's called by
/// `FlutterWebDriver` to fulfill FlutterDriver commands.
///
/// See also:
///
/// * `_extension_io.dart`, which has the dart:io implementation
void registerWebServiceExtension(Future<Map<String, dynamic>> Function(Map<String, String>) callback) {
// Define the result variable because packages/flutter_driver/lib/src/driver/web_driver.dart
// checks for this value to become non-null when waiting for the result. If this value is
// undefined at the time of the check, WebDriver throws an exception.
context[r'$flutterDriverResult'] = null;
js_util.setProperty(html.window, r'$flutterDriver', allowInterop((dynamic message) async {
try {
final Map<String, dynamic> messageJson = jsonDecode(message as String) as Map<String, dynamic>;
final Map<String, String> params = messageJson.cast<String, String>();
final Map<String, dynamic> result = await callback(params);
context[r'$flutterDriverResult'] = json.encode(result);
} catch (error, stackTrace) {
// Encode the error in the same format the FlutterDriver extension uses.
// See //packages/flutter_driver/lib/src/extension/extension.dart
context[r'$flutterDriverResult'] = json.encode(<String, dynamic>{
'isError': true,
'response': '$error\n$stackTrace',
});
}
}));
}