Package-ify Dromaeo and browser controller functionality

tools/testing/dart/browser_perf_testing/lib/browser_perf_testing.dart

-// Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-/// Dart script to launch performance tests without WebDriver/Selenium.
-///
-/// WARNING: Although this is laid out like a package, it is not really a
-/// package since it relies on test.dart files!
-library browser_perf_testing;
-
-import '../../browser_controller.dart';
-import '../../utils.dart';
-import '../../http_server.dart';
-import 'dart:async';
-import 'dart:io';
-import 'dart:convert';
-import 'package:path/path.dart' as path;
-import 'package:args/args.dart' as args_parser;
-
-final String ADDRESS = '127.0.0.1';
-
-/// A map that is passed to the testing framework to specify what ports the
-/// browser controller runs on.
-final Map SERVER_CONFIG = {
-  'test_driver_port': 0,
-  'test_driver_error_port': 0
-};
-
-void main (List<String> args) {
-  var options = _parseArguments(args);
-
-  // Start a server to serve the entire repo: the http server is available on
-  // window.location.port.
-  var servers = new TestingServers(
-      new Path('/Users/efortuna/dart-git2/dart/xcodebuild/ReleaseIA32'),
-      false, options['browser'], path.dirname(path.dirname(path.dirname(
-      path.dirname(path.dirname(path.dirname(Platform.script.path)))))));
-  servers.startServers(ADDRESS).then((_) {
-    _runPerfTests(options, servers);
-  });
-}
-
-/// Helper function to parse the arguments for this file.
-Map _parseArguments(List<String> args) {
-  var parser =  new args_parser.ArgParser();
-  parser.addOption('browser', defaultsTo: 'chrome', help: 'Name of the browser'
-      ' to run this test with.');
-  parser.addOption('termination_test_file', defaultsTo:
-      '/root_dart/samples/third_party/dromaeo/dromaeo_end_condition.js',
-      help: 'Path to a javascript file that contains the function '
-      '"testIsComplete" tests whether the performance test has finished '
-      'running. This is in a form that can be served up by '
-      'http_server.dart, so it begins with /root_dart or some other server '
-      'understood prefix.');
-  parser.addOption('test_path', defaultsTo:
-      '/root_dart/samples/third_party/dromaeo/index-js.html?jsANDqueryORjs'
-      'ANDtraverseORjsANDattributes', help: 'Path to the performance test we '
-      'wish to run. This is in a form that can be served up by '
-      'http_server.dart, so it begins with /root_dart or some other server '
-      'understood prefix.');
-  parser.addOption('checked', defaultsTo: false,
-      help: 'Run this test in checked mode.');
-  parser.addFlag('help', abbr: 'h', negatable: false, callback: (help) {
-    if (help) {
-      print(parser.getUsage());
-      exit(0);
-    };
-  });
-  parser.addOption('timeout', defaultsTo: 300,
-      help: 'Maximum amount of time to let a test run, in seconds.');
-  return parser.parse(args);
-}
-
-void _runPerfTests(Map options, TestingServers servers) {
-  var browserName = options['browser'];
-
-  var testRunner = new BrowserTestRunner(SERVER_CONFIG, ADDRESS, browserName, 1,
-      checkedMode: options['checked'],
-      testingServer: new BrowserPerfTestingServer(browserName,
-      options['termination_test_file'], servers.port));
-
-  var url = 'http://$ADDRESS:${servers.port}${options["test_path"]}';
-
-  BrowserTest browserTest = new BrowserTest(url,
-      (BrowserTestOutput output) {
-        var eventQueue = JSON.decode(output.lastKnownMessage);
-        var lastEvent = eventQueue.last;
-        var lines = lastEvent['value'].split('\n');
-        for (var line in lines) {
-          print(line);
-        }
-        testRunner.terminate();
-        servers.stopServers();
-      }, options['timeout']);
-
-  testRunner.start().then((started) {
-    if (started) {
-      testRunner.queueTest(browserTest);
-    } else {
-      print("Issue starting browser test runner $started");
-      exit(1);
-    }
-  });
-}
-
-/// Server for controlling and running performance tests. Note the tests
-/// themselves are served on the local file system (to eliminate any additional
-/// potential sources of lag), but we need a server to communicate when the test
-/// is done.
-class BrowserPerfTestingServer extends BrowserTestingServer {
-  // Path to the script containing the ending condition of the performance test,
-  // in the form of /root_dart, /root_build, or some other, as per the form of
-  // url expected from http_server.dart.
-  String endConditionScript;
-  /// Port number to access the server serving the whole Dart repository.
-  int repoPort;
-
-  BrowserPerfTestingServer(String browserName, this.endConditionScript,
-      this.repoPort) : super(SERVER_CONFIG, ADDRESS,
-      !Browser.BROWSERS_WITH_WINDOW_SUPPORT.contains(browserName));
-
-  /// We create a slightly modified version of the original browser_controller
-  /// driver page.
-  String getDriverPage(String browserId) {
-    var orig = super.getDriverPage(browserId);
-    //TODO(efortuna): Hacky!
-    var insertIndex = orig.indexOf('<script type');
-    var otherInsert = orig.indexOf('} else {',
-        orig.indexOf('if (isStatusUpdate)'));
-    var result = orig.substring(0, insertIndex) + """
-    <!-- To create a performance test, you must write a script that provides an
-  ending condition for the particular test, in the form /root_dart/foo (or
-  whatever base from http_server). // TODO not hard code.-->
-  <script src="http://$localIp:$repoPort$endConditionScript"></script>
-""" + orig.substring(insertIndex, otherInsert) + """
-            if (testIsComplete(msg)) {
-              var obj = new Object();
-              obj['message'] = msg;
-              obj['is_first_message'] = false;
-              obj['is_status_update'] = false;
-              obj['is_done'] = true;
-              window.postMessage(JSON.stringify(obj), '*');
-            }""" + orig.substring(otherInsert);
-    return result;
-  }
-}