| // 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 'common.dart'; |
| |
| /// The dart:html implementation of [CallbackManager]. |
| /// |
| /// See also: |
| /// |
| /// * `_callback_io.dart`, which has the dart:io implementation |
| CallbackManager get callbackManager => _singletonWebDriverCommandManager; |
| |
| /// WebDriverCommandManager singleton. |
| final WebCallbackManager _singletonWebDriverCommandManager = |
| WebCallbackManager(); |
| |
| /// Manages communication between `integration_tests` and the `driver_tests`. |
| /// |
| /// Along with responding to callbacks from the driver side this calls enables |
| /// usage of Web Driver commands by sending [WebDriverCommand]s to driver side. |
| /// |
| /// Tests can execute an Web Driver commands such as `screenshot` using browsers' |
| /// WebDriver APIs. |
| /// |
| /// See: https://www.w3.org/TR/webdriver/ |
| class WebCallbackManager implements CallbackManager { |
| /// App side tests will put the command requests from WebDriver to this pipe. |
| Completer<WebDriverCommand> _webDriverCommandPipe = |
| Completer<WebDriverCommand>(); |
| |
| /// Updated when WebDriver completes the request by the test method. |
| /// |
| /// For example, a test method will ask for a screenshot by calling |
| /// `takeScreenshot`. When this screenshot is taken [_driverCommandComplete] |
| /// will complete. |
| Completer<bool> _driverCommandComplete = Completer<bool>(); |
| |
| /// Takes screenshot using WebDriver screenshot command. |
| /// |
| /// Only works on Web when tests are run via `flutter driver` command. |
| /// |
| /// See: https://www.w3.org/TR/webdriver/#screen-capture. |
| @override |
| Future<Map<String, dynamic>> takeScreenshot(String screenshotName) async { |
| await _sendWebDriverCommand(WebDriverCommand.screenshot(screenshotName)); |
| // Flutter Web doesn't provide the bytes. |
| return const <String, dynamic>{'bytes': <int>[]}; |
| } |
| |
| @override |
| Future<void> convertFlutterSurfaceToImage() async { |
| // Noop on Web. |
| } |
| |
| Future<void> _sendWebDriverCommand(WebDriverCommand command) async { |
| try { |
| _webDriverCommandPipe.complete(command); |
| final bool awaitCommand = await _driverCommandComplete.future; |
| if (!awaitCommand) { |
| throw Exception( |
| 'Web Driver Command ${command.type} failed while waiting for ' |
| 'driver side'); |
| } |
| } catch (exception) { |
| throw Exception('Web Driver Command failed: ${command.type} with exception $exception'); |
| } finally { |
| // Reset the completer. |
| _driverCommandComplete = Completer<bool>(); |
| } |
| } |
| |
| /// The callback function to response the driver side input. |
| /// |
| /// Provides a handshake mechanism for executing [WebDriverCommand]s on the |
| /// driver side. |
| @override |
| Future<Map<String, dynamic>> callback( |
| Map<String, String> params, IntegrationTestResults testRunner) async { |
| final String command = params['command']!; |
| Map<String, String> response; |
| switch (command) { |
| case 'request_data': |
| return params['message'] == null |
| ? _requestData(testRunner) |
| : _requestDataWithMessage(params['message']!, testRunner); |
| case 'get_health': |
| response = <String, String>{'status': 'ok'}; |
| break; |
| default: |
| throw UnimplementedError('$command is not implemented'); |
| } |
| return <String, dynamic>{ |
| 'isError': false, |
| 'response': response, |
| }; |
| } |
| |
| Future<Map<String, dynamic>> _requestDataWithMessage( |
| String extraMessage, IntegrationTestResults testRunner) async { |
| Map<String, String> response; |
| // Driver side tests' status is added as an extra message. |
| final DriverTestMessage message = |
| DriverTestMessage.fromString(extraMessage); |
| // If driver side tests are pending send the first command in the |
| // `commandPipe` to the tests. |
| if (message.isPending) { |
| final WebDriverCommand command = await _webDriverCommandPipe.future; |
| switch (command.type) { |
| case WebDriverCommandType.screenshot: |
| final Map<String, dynamic> data = Map<String, dynamic>.from(command.values); |
| data.addAll( |
| WebDriverCommand.typeToMap(WebDriverCommandType.screenshot)); |
| response = <String, String>{ |
| 'message': Response.webDriverCommand(data: data).toJson(), |
| }; |
| break; |
| case WebDriverCommandType.noop: |
| final Map<String, dynamic> data = <String, dynamic>{}; |
| data.addAll(WebDriverCommand.typeToMap(WebDriverCommandType.noop)); |
| response = <String, String>{ |
| 'message': Response.webDriverCommand(data: data).toJson(), |
| }; |
| break; |
| case WebDriverCommandType.ack: |
| throw UnimplementedError('${command.type} is not implemented'); |
| } |
| } else { |
| final Map<String, dynamic> data = <String, dynamic>{}; |
| data.addAll(WebDriverCommand.typeToMap(WebDriverCommandType.ack)); |
| response = <String, String>{ |
| 'message': Response.webDriverCommand(data: data).toJson(), |
| }; |
| _driverCommandComplete.complete(message.isSuccess); |
| _webDriverCommandPipe = Completer<WebDriverCommand>(); |
| } |
| return <String, dynamic>{ |
| 'isError': false, |
| 'response': response, |
| }; |
| } |
| |
| Future<Map<String, dynamic>> _requestData(IntegrationTestResults testRunner) async { |
| final bool allTestsPassed = await testRunner.allTestsPassed.future; |
| final Map<String, String> response = <String, String>{ |
| 'message': allTestsPassed |
| ? Response.allTestsPassed(data: testRunner.reportData).toJson() |
| : Response.someTestsFailed( |
| testRunner.failureMethodsDetails, |
| data: testRunner.reportData, |
| ).toJson(), |
| }; |
| return <String, dynamic>{ |
| 'isError': false, |
| 'response': response, |
| }; |
| } |
| |
| @override |
| void cleanup() { |
| if (!_webDriverCommandPipe.isCompleted) { |
| _webDriverCommandPipe |
| .complete(Future<WebDriverCommand>.value(WebDriverCommand.noop())); |
| } |
| |
| if (!_driverCommandComplete.isCompleted) { |
| _driverCommandComplete.complete(Future<bool>.value(false)); |
| } |
| } |
| } |