| // Copyright 2017 The Chromium 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:convert' show json; |
| |
| import '../base/io.dart' show stdout; |
| import 'watcher.dart'; |
| |
| /// Prints JSON events when running a test in --machine mode. |
| class EventPrinter extends TestWatcher { |
| EventPrinter({StringSink out}) : this._out = out == null ? stdout: out; |
| |
| final StringSink _out; |
| |
| @override |
| void handleStartedProcess(ProcessEvent event) { |
| _sendEvent('test.startedProcess', |
| <String, dynamic>{'observatoryUri': event.observatoryUri.toString()}); |
| } |
| |
| void _sendEvent(String name, [dynamic params]) { |
| final Map<String, dynamic> map = <String, dynamic>{ 'event': name}; |
| if (params != null) { |
| map['params'] = params; |
| } |
| _send(map); |
| } |
| |
| void _send(Map<String, dynamic> command) { |
| final String encoded = json.encode(command, toEncodable: _jsonEncodeObject); |
| _out.writeln('\n[$encoded]'); |
| } |
| |
| dynamic _jsonEncodeObject(dynamic object) { |
| if (object is Uri) { |
| return object.toString(); |
| } |
| return object; |
| } |
| } |