Add LibraryDependencyMirror.isDeferred.

tests/lib/mirrors/library_imports_deferred_test.dart

+// Copyright (c) 2014, 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.
+
+library test.library_imports_deferred;
+
+import 'dart:mirrors';
+import 'package:expect/expect.dart';
+import 'stringify.dart';
+
+import 'dart:collection' deferred as lazycollection;

[siva, 2015/02/14 00:25:22]

Need to add a test which imports the same library in non deferred mode.

[rmacnak, 2015/02/14 00:37:54]

Done.

+
+test(MirrorSystem mirrors) {
+  LibraryMirror thisLibrary =
+      mirrors.findLibrary(#test.library_imports_deferred);
+  LibraryMirror collection  =
+      mirrors.findLibrary(#dart.collection);
+
+  LibraryDependencyMirror dep =
+      thisLibrary.libraryDependencies.singleWhere((dep) => dep.isDeferred);
+  Expect.equals(collection, dep.targetLibrary);
+
+  Expect.stringEquals(
+      'import dart.collection deferred as lazycollection\n'
+      ' hide loadLibrary\n'
+      'import dart.core\n'
+      'import dart.mirrors\n'
+      'import expect\n'
+      'import test.stringify\n',
+      stringifyDependencies(thisLibrary));
+}
+
+main() {
+  test(currentMirrorSystem());
+}