blob: 9999881eff9678503476c6ca69bae2faab749f47 [file] [log] [blame]
// 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.
// 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";
import 'package:compiler/src/dart2jslib.dart'
as dart2js;
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((_) {
lookupLibrary(name) {
return compiler.libraryLoader.lookupLibrary(Uri.parse(name));
var main = compiler.mainApp.find(dart2js.Compiler.MAIN);
var outputUnitForElement = compiler.deferredLoadTask.outputUnitForElement;
var mainOutputUnit = compiler.deferredLoadTask.mainOutputUnit;
var backend = compiler.backend;
var classes = backend.emitter.neededClasses;
var lib1 = lookupLibrary("memory:lib1.dart");
var lib2 = lookupLibrary("memory:lib2.dart");
var foo1 = lib1.find("foo1");
var foo2 = lib2.find("foo2");
var outputClassLists = backend.emitter.outputClassLists;
Expect.notEquals(mainOutputUnit, outputUnitForElement(foo2));
// lib1 imports lib2 deferred. But mainlib never uses DeferredLibrary.
// Test that this case works.
const Map MEMORY_SOURCE_FILES = const {
library mainlib;
import 'lib1.dart' as lib1;
void main() {
library lib1;
import 'lib2.dart' deferred as lib2;
const def = const DeferredLibrary('lib2');
void foo1() {
lib1.loadLibrary().then((_) => lib2.foo2());
library lib2;
void foo2() {}