|  | // Copyright (c) 2016, 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 = 2.9 | 
|  |  | 
|  | import "package:expect/expect.dart"; | 
|  | // A deferred library that doesn't exist. | 
|  | import 'package:foo/foo.dart' deferred as foo; | 
|  | // A deferred library that does exist. | 
|  | import 'deferred/exists.dart' deferred as exists; | 
|  | // A deferred library that transitively will fail due to a file not found. | 
|  | import 'deferred/transitive_error.dart' deferred as te; | 
|  |  | 
|  | main() async { | 
|  | // Attempt to load foo which will fail. | 
|  | var fooError; | 
|  | await foo.loadLibrary().catchError((e) { | 
|  | fooError = e; | 
|  | }); | 
|  | Expect.isNotNull(fooError); | 
|  | await exists.loadLibrary(); | 
|  | Expect.equals(99, exists.x); | 
|  | /* TODO(johnmccutchan): Implement transitive error reporting. | 
|  | var teError; | 
|  | await te.loadLibrary().catchError((e) { | 
|  | teError = e; | 
|  | }); | 
|  | Expect.isNotNull(teError); | 
|  | */ | 
|  | } |