blob: 2297f0e29e6b409b5353fb5f75801d2f39fdd20d [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 f1 = lib.find("f1");
var f2 = lib.find("f2");
Expect.notEquals(mainOutputUnit, outputUnitForElement(f1));
Expect.equals(mainOutputUnit, outputUnitForElement(f2));
// The main library imports lib1 and lib2 deferred and use lib1.foo1 and
// lib2.foo2. This should trigger seperate outputunits for main, lib1 and lib2.
// Both lib1 and lib2 import lib3 directly and
// both use lib3.foo3. Therefore a shared output unit for lib1 and lib2 should
// be created.
// lib1 and lib2 also import lib4 deferred, but lib1 uses lib4.bar1 and lib2
// uses lib4.bar2. So two output units should be created for lib4, one for each
// import.
const Map MEMORY_SOURCE_FILES = const {"main.dart": """
import "dart:async";
import 'lib.dart' deferred as lib show f1;
import 'lib.dart' show f2;
void main() {
lib.loadLibrary().then((_) {
""", "lib.dart": """
int f1 () {
return 1;
int f2 () {
return 2;