Sigmund Cherem
912005267d
Change-Id: I46be49b2effec3e38a3dc44cd45cfe736f77fa78 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/182680 Commit-Queue: Sigmund Cherem <sigmund@google.com> Reviewed-by: Joshua Litt <joshualitt@google.com> Reviewed-by: Nicholas Shahan <nshahan@google.com> Reviewed-by: Stephen Adams <sra@google.com>
48 lines
1.2 KiB
Dart
48 lines
1.2 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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// Test that loading of a library (with top-level functions only) can
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// be deferred.
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import 'package:async_helper/async_helper.dart';
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import 'package:expect/expect.dart';
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import 'deferred_function_library.dart' deferred as lib;
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bool isError(e) => e is Error;
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readFoo() {
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return lib.foo;
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}
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main() {
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Expect.throws(() {
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lib.foo('a');
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}, isError);
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Expect.throws(readFoo, isError);
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int counter = 0;
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asyncStart();
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lib.loadLibrary().then((_) {
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Expect.equals(1, ++counter);
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print('lazy was loaded');
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Expect.equals(42, lib.foo('b'));
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Expect.isNotNull(readFoo());
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asyncEnd();
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});
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Expect.equals(0, counter);
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asyncStart();
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lib.loadLibrary().then((_) {
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Expect.equals(2, ++counter);
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print('lazy was loaded');
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Expect.equals(42, lib.foo('b'));
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Expect.isNotNull(readFoo());
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asyncEnd();
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});
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Expect.equals(0, counter);
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Expect.throws(() {
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lib.foo('a');
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}, isError);
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Expect.throws(readFoo, isError);
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}
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