Joshua Litt
20faaa5d94
Change-Id: Ib18f554c1076f27a3f7c0df5a36410da41a1f467 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/148784 Reviewed-by: Paul Berry <paulberry@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
67 lines
2.1 KiB
Dart
67 lines
2.1 KiB
Dart
// Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.7
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// Test of the graph segmentation algorithm used by deferred loading
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// to determine which elements can be deferred and which libraries
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// much be included in the initial download (loaded eagerly).
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import 'package:async_helper/async_helper.dart';
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import 'package:compiler/src/compiler.dart';
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import 'package:expect/expect.dart';
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import '../helpers/memory_compiler.dart';
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void main() {
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asyncTest(() async {
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CompilationResult result =
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await runCompiler(memorySourceFiles: MEMORY_SOURCE_FILES);
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Compiler compiler = result.compiler;
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var closedWorld = compiler.backendClosedWorldForTesting;
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var env = closedWorld.elementEnvironment;
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var outputUnitForMember = closedWorld.outputUnitData.outputUnitForMember;
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var mainOutputUnit = closedWorld.outputUnitData.mainOutputUnit;
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dynamic lib = env.lookupLibrary(Uri.parse("memory:lib.dart"));
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var f1 = env.lookupLibraryMember(lib, "f1");
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var f2 = env.lookupLibraryMember(lib, "f2");
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Expect.notEquals(mainOutputUnit, outputUnitForMember(f1));
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Expect.equals(mainOutputUnit, outputUnitForMember(f2));
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});
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}
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// The main library imports lib1 and lib2 deferred and use lib1.foo1 and
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// lib2.foo2. This should trigger seperate outputunits for main, lib1 and lib2.
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//
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// Both lib1 and lib2 import lib3 directly and
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// both use lib3.foo3. Therefore a shared output unit for lib1 and lib2 should
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// be created.
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//
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// lib1 and lib2 also import lib4 deferred, but lib1 uses lib4.bar1 and lib2
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// uses lib4.bar2. So two output units should be created for lib4, one for each
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// import.
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const Map<String, String> MEMORY_SOURCE_FILES = const {
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"main.dart": """
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import "dart:async";
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import 'lib.dart' deferred as lib show f1;
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import 'lib.dart' show f2;
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void main() {
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print(f2());
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lib.loadLibrary().then((_) {
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print(lib.f1());
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});
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}
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""",
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"lib.dart": """
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int f1 () {
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return 1;
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}
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int f2 () {
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return 2;
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}
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""",
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};
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