blob: 9cbf87fa14dab133841797795608978055f7ef14 [file] [log] [blame]
// Copyright (c) 2013, 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.
// Test of the graph segmentation algorithm used by deferred loading
// to determine which elements can be deferred and which libraries
// much be included in the initial download (loaded eagerly).
import 'package:expect/expect.dart';
import "package:async_helper/async_helper.dart";
import 'memory_source_file_helper.dart';
import "dart:async";
class FakeOutputStream<T> extends EventSink<T> {
void add(T event) {}
void addError(T event, [StackTrace stackTrace]) {}
void close() {}
void main() {
Uri script = currentDirectory.resolveUri(Platform.script);
Uri libraryRoot = script.resolve('../../../sdk/');
Uri packageRoot = script.resolve('./packages/');
var provider = new MemorySourceFileProvider(MEMORY_SOURCE_FILES);
var handler = new FormattingDiagnosticHandler(provider);
Compiler compiler = new Compiler(provider.readStringFromUri,
(name, extension) => new FakeOutputStream(),
asyncTest(() =>'memory:main.dart')).then((_) {
var outputUnitForElement = compiler.deferredLoadTask.outputUnitForElement;
var mainOutputUnit = compiler.deferredLoadTask.mainOutputUnit;
var lib =
var customType = lib.find("CustomType");
var foo = lib.find("foo");
Expect.notEquals(mainOutputUnit, outputUnitForElement(foo));
// Native elements are not deferred
Expect.equals(mainOutputUnit, outputUnitForElement(customType));
// The main library imports a file defining a custom element.
// Registering this class implicitly causes the constructors to be
// live. Check that this is handled.
const Map MEMORY_SOURCE_FILES = const {"main.dart": """
import "lib.dart" deferred as a;
import 'dart:html';
main() {
document.registerElement("foo-tag", a.a);;
""", "lib.dart": """
import 'dart:html';
var a = CustomType;
class CustomType extends HtmlElement {
factory CustomType() => null;
CustomType.created() : super.created() ;
foo() {}