Update dart2js unit tests to dart_parser and dart_scanner.

pkg/dart2js_incremental/lib/compiler.dart

-// Copyright (c) 2015, 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.
-
-import 'dart:io';
-
-import 'dart:async' show
-    EventSink,
-    Future,
-    Stream,
-    StreamController,
-    StreamSubscription;
-
-import 'package:dart2js_incremental/dart2js_incremental.dart' show
-    IncrementalCompilationFailed,
-    IncrementalCompiler;
-
-import 'package:compiler/compiler_new.dart' show
-    CompilerOutput;
-
-import 'package:compiler/src/old_to_new_api.dart' show
-    LegacyCompilerDiagnostics,
-    LegacyCompilerInput;
-
-import 'package:compiler/src/source_file_provider.dart' show
-    FormattingDiagnosticHandler;
-
-import 'watcher.dart';
-
-main(List<String> arguments) {
-  int updateCount = 0;
-  StreamSubscription<CompilerEvent> subscription =
-      compile(Uri.base.resolve(arguments.first)).listen(null);
-  subscription.onData((CompilerEvent event) {
-    switch (event.kind) {
-      case IncrementalKind.FULL:
-        updateCount = 0;
-        print('// Compiled JavaScript:');
-        print(event['.js']);
-        break;
-
-      case IncrementalKind.INCREMENTAL:
-        Stopwatch sw = event.stopwatch..start();
-        String updates = '${event.compiler.allUpdates()}';
-        sw.stop();
-
-        print('// Patch after ${++updateCount} updates,');
-        print('// computed in ${sw.elapsedMicroseconds/1000000} seconds:');
-        print(updates);
-        break;
-
-      case IncrementalKind.ERROR:
-        updateCount = 0;
-        print("Compilation failed");
-        break;
-
-      default:
-        throw "Unknown kind: ${event.kind}";
-    }
-  });
-  subscription.onError((error, StackTrace trace) {
-    if (error is IncrementalCompilationFailed) {
-      print("Incremental compilation failed due to:\n${error.reason}");
-    } else {
-      throw error;
-    }
-  });
-}
-
-Stream<CompilerEvent> compile(Uri originalInput) {
-  StreamController<CompilerEvent> controller =
-      new StreamController<CompilerEvent>();
-  compileToStream(originalInput, controller);
-  return controller.stream;
-}
-
-compileToStream(
-    Uri originalInput,
-    StreamController<CompilerEvent> controller) async {
-  var watcher = new Watcher();
-
-  Uri libraryRoot = Uri.base.resolve('sdk/');
-  Uri packageRoot = Uri.base.resolve('packages/');
-
-  FormattingDiagnosticHandler diagnosticHandler =
-      new FormattingDiagnosticHandler();
-
-  OutputProvider outputProvider = new OutputProvider();
-
-  void resilientDiagnosticHandler(
-      Uri uri, int begin, int end, String message, kind) {
-    try {
-      diagnosticHandler(uri, begin, end, message, kind);
-    } catch (e) {
-      String name = diagnosticHandler.provider.relativizeUri(uri);
-      print('$name@$begin+${end - begin}: [$kind] $message}');
-    }
-  }
-
-  Future inputProvider(Uri uri) {
-    if (uri.scheme == "file") {
-      if (!'$uri'.startsWith('$libraryRoot')) {
-        watcher.watchFile(uri);
-      }
-    }
-    return diagnosticHandler.provider(uri);
-  }
-
-  while (true) {
-    Stopwatch sw = new Stopwatch()..start();
-    IncrementalCompiler compiler = new IncrementalCompiler(
-        libraryRoot: libraryRoot,
-        packageRoot: packageRoot,
-        inputProvider: new LegacyCompilerInput(inputProvider),
-        diagnosticHandler:
-            new LegacyCompilerDiagnostics(resilientDiagnosticHandler),
-        outputProvider: outputProvider);
-
-    bool success = await compiler.compile(originalInput);
-    sw.stop();
-    if (success) {
-      controller.add(
-          new CompilerEvent(
-              IncrementalKind.FULL, compiler, outputProvider.output, sw));
-    } else {
-      controller.add(
-          new CompilerEvent(
-              IncrementalKind.ERROR, compiler, outputProvider.output, sw));
-    }
-
-    while (await watcher.hasChanges()) {
-      try {
-        Map<Uri, Uri> changes = watcher.readChanges();
-
-        sw = new Stopwatch()..start();
-        String updates = await compiler.compileUpdates(changes);
-        sw.stop();
-
-        controller.add(
-            new CompilerEvent(
-                IncrementalKind.INCREMENTAL, compiler, outputProvider.output,
-                sw, updates: updates));
-
-      } on IncrementalCompilationFailed catch (error, trace) {
-        controller.addError(error, trace);
-        break;
-      }
-    }
-  }
-}
-
-/// Output provider which collects output in [output].
-class OutputProvider implements CompilerOutput {
-  final Map<String, String> output = new Map<String, String>();
-
-  EventSink<String> createEventSink(String name, String extension) {
-    return new StringEventSink((String data) {
-      output['$name.$extension'] = data;
-    });
-  }
-
-  String operator[](String key) => output[key];
-}
-
-/// Helper class to collect sources.
-class StringEventSink implements EventSink<String> {
-  List<String> data = <String>[];
-
-  final Function onClose;
-
-  StringEventSink(this.onClose);
-
-  void add(String event) {
-    if (data == null) throw 'StringEventSink is closed.';
-    data.add(event);
-  }
-
-  void addError(errorEvent, [StackTrace stackTrace]) {
-    throw 'addError($errorEvent, $stackTrace)';
-  }
-
-  void close() {
-    if (data != null) {
-      onClose(data.join());
-      data = null;
-    }
-  }
-}
-
-enum IncrementalKind {
-  FULL,
-  INCREMENTAL,
-  ERROR,
-}
-
-class CompilerEvent {
-  final IncrementalKind kind;
-
-  final IncrementalCompiler compiler;
-
-  final Map<String, String> _output;
-
-  final Stopwatch stopwatch;
-
-  final String updates;
-
-  CompilerEvent(
-      this.kind, this.compiler, this._output, this.stopwatch, {this.updates});
-
-  String operator[](String key) => _output[key];
-}