dart2js: Support isDeferred on DependencyMirrors.

tests/compiler/dart2js/mirrors_exports_test.dart

 // Copyright (c) 2012, 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.
 
 import 'package:expect/expect.dart';
 import 'package:async_helper/async_helper.dart';
 import 'dart:async';
 import 'memory_compiler.dart';
 import 'package:compiler/src/mirrors/source_mirrors.dart';
 
 const SOURCE_FILES = const {
 'main.dart': '''
 import 'a.dart' show A1, A2;
 import 'b.dart' as b hide B1;
 export 'a.dart' show A2 hide A3, A1;
 export 'b.dart' hide B1, B2 show B3;
 import 'dart:core' as core;
+import 'c.dart' deferred as c;
 
 main() {}
 ''',
 'a.dart': '''
 class A1 {}
 class A2 {}
 class A3 {}
 ''',
 'b.dart': '''
 class B1 {}
 class B2 {}
 class B3 {}
+''',
+'c.dart': '''
+foo() => 499;
 '''
 };
 
 void main() {
   asyncTest(() => mirrorSystemFor(SOURCE_FILES).then((MirrorSystem mirrors) {
     LibrarySourceMirror mainLibrary =
         mirrors.libraries[Uri.parse('memory:main.dart')];
     Expect.isNotNull(mainLibrary);
 
     LibrarySourceMirror aLibrary =
         mirrors.libraries[Uri.parse('memory:a.dart')];
     Expect.isNotNull(aLibrary);
 
     LibrarySourceMirror bLibrary =
         mirrors.libraries[Uri.parse('memory:b.dart')];
     Expect.isNotNull(bLibrary);
 
+    LibrarySourceMirror cLibrary =
+        mirrors.libraries[Uri.parse('memory:c.dart')];
+    Expect.isNotNull(cLibrary);
+
     LibrarySourceMirror coreLibrary =
         mirrors.libraries[Uri.parse('dart:core')];
     Expect.isNotNull(coreLibrary);
 
     var dependencies = mainLibrary.libraryDependencies;
     Expect.isNotNull(dependencies);
-    Expect.equals(5, dependencies.length);
+    Expect.equals(6, dependencies.length);
 
     // import 'a.dart' show A1, A2;
     var dependency = dependencies[0];
     Expect.isNotNull(dependency);
     Expect.isTrue(dependency.isImport);
     Expect.isFalse(dependency.isExport);
     Expect.equals(mainLibrary, dependency.sourceLibrary);
     Expect.equals(aLibrary, dependency.targetLibrary);
     Expect.isNull(dependency.prefix);
+    Expect.isFalse(dependency.isDeferred);
 
     var combinators = dependency.combinators;
     Expect.isNotNull(combinators);
     Expect.equals(1, combinators.length);
 
     var combinator = combinators[0];
     Expect.isNotNull(combinator);
     Expect.isTrue(combinator.isShow);
     Expect.isFalse(combinator.isHide);
     Expect.listEquals(['A1', 'A2'], combinator.identifiers);
 
     // import 'b.dart' as b hide B1;
     dependency = dependencies[1];
     Expect.isNotNull(dependency);
     Expect.isTrue(dependency.isImport);
     Expect.isFalse(dependency.isExport);
     Expect.equals(mainLibrary, dependency.sourceLibrary);
     Expect.equals(bLibrary, dependency.targetLibrary);
     Expect.equals('b', dependency.prefix);
+    Expect.isFalse(dependency.isDeferred);
 
     combinators = dependency.combinators;
     Expect.isNotNull(combinators);
     Expect.equals(1, combinators.length);
 
     combinator = combinators[0];
     Expect.isNotNull(combinator);
     Expect.isFalse(combinator.isShow);
     Expect.isTrue(combinator.isHide);
     Expect.listEquals(['B1'], combinator.identifiers);
 
     // export 'a.dart' show A2 hide A3, A1;
     dependency = dependencies[2];
     Expect.isNotNull(dependency);
     Expect.isFalse(dependency.isImport);
     Expect.isTrue(dependency.isExport);
     Expect.equals(mainLibrary, dependency.sourceLibrary);
     Expect.equals(aLibrary, dependency.targetLibrary);
     Expect.isNull(dependency.prefix);
+    Expect.isFalse(dependency.isDeferred);
 
     combinators = dependency.combinators;
     Expect.isNotNull(combinators);
     Expect.equals(2, combinators.length);
 
     combinator = combinators[0];
     Expect.isNotNull(combinator);
     Expect.isTrue(combinator.isShow);
     Expect.isFalse(combinator.isHide);
     Expect.listEquals(['A2'], combinator.identifiers);
 
     combinator = combinators[1];
     Expect.isNotNull(combinator);
     Expect.isFalse(combinator.isShow);
     Expect.isTrue(combinator.isHide);
     Expect.listEquals(['A3', 'A1'], combinator.identifiers);
 
     // export 'b.dart' hide B1, B2 show B3;
     dependency = dependencies[3];
     Expect.isNotNull(dependency);
     Expect.isFalse(dependency.isImport);
     Expect.isTrue(dependency.isExport);
     Expect.equals(mainLibrary, dependency.sourceLibrary);
     Expect.equals(bLibrary, dependency.targetLibrary);
     Expect.isNull(dependency.prefix);
+    Expect.isFalse(dependency.isDeferred);
 
     combinators = dependency.combinators;
     Expect.isNotNull(combinators);
     Expect.equals(2, combinators.length);
 
     combinator = combinators[0];
     Expect.isNotNull(combinator);
     Expect.isFalse(combinator.isShow);
     Expect.isTrue(combinator.isHide);
     Expect.listEquals(['B1', 'B2'], combinator.identifiers);
 
     combinator = combinators[1];
     Expect.isNotNull(combinator);
     Expect.isTrue(combinator.isShow);
     Expect.isFalse(combinator.isHide);
     Expect.listEquals(['B3'], combinator.identifiers);
 
     // import 'dart:core' as core;
     dependency = dependencies[4];
     Expect.isNotNull(dependency);
     Expect.isTrue(dependency.isImport);
     Expect.isFalse(dependency.isExport);
     Expect.equals(mainLibrary, dependency.sourceLibrary);
     Expect.equals(coreLibrary, dependency.targetLibrary);
     Expect.equals('core', dependency.prefix);
+    Expect.isFalse(dependency.isDeferred);
 
     combinators = dependency.combinators;
     Expect.isNotNull(combinators);
+    Expect.equals(0, combinators.length);
+
+    // import 'c.dart' deferred as c;
+    dependency = dependencies[5];
+    Expect.isNotNull(dependency);
+    Expect.isTrue(dependency.isImport);
+    Expect.isFalse(dependency.isExport);
+    Expect.equals(mainLibrary, dependency.sourceLibrary);
+    Expect.equals(cLibrary, dependency.targetLibrary);
+    Expect.equals('c', dependency.prefix);
+    Expect.isTrue(dependency.isDeferred);
+
+    combinators = dependency.combinators;
+    Expect.isNotNull(combinators);
     Expect.equals(0, combinators.length);
   }));
 }