blob: e5796802eac3ad7b7eb4e31b88155bb97b642ad9 [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.
// @dart = 2.7
// 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:async_helper/async_helper.dart';
import 'package:compiler/src/compiler.dart';
import 'package:expect/expect.dart';
import '../helpers/memory_compiler.dart';
void main() {
asyncTest(() async {
CompilationResult result =
await runCompiler(memorySourceFiles: MEMORY_SOURCE_FILES);
Compiler compiler = result.compiler;
var closedWorld = compiler.backendClosedWorldForTesting;
var env = closedWorld.elementEnvironment;
var outputUnitForMember = closedWorld.outputUnitData.outputUnitForMember;
var mainOutputUnit = closedWorld.outputUnitData.mainOutputUnit;
dynamic lib = env.lookupLibrary(Uri.parse("memory:lib.dart"));
var f1 = env.lookupLibraryMember(lib, "f1");
var f2 = env.lookupLibraryMember(lib, "f2");
Expect.notEquals(mainOutputUnit, outputUnitForMember(f1));
Expect.equals(mainOutputUnit, outputUnitForMember(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<String, String> 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;