Converted Observatory class-tree element

runtime/observatory/tests/observatory_ui/mocks/repositories/class.dart

+// 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.
+
+part of mocks;
+
+typedef Future<M.Class> ClassRepositoryMockObjectCallback();
+typedef Future<M.Class> ClassRepositoryMockGetterCallback(String id);
+
+class ClassRepositoryMock implements M.ClassRepository {
+  final ClassRepositoryMockObjectCallback _object;
+  final ClassRepositoryMockGetterCallback _get;
+
+  ClassRepositoryMock({ClassRepositoryMockObjectCallback object,
+                       ClassRepositoryMockGetterCallback getter})
+    : _object = object,
+      _get = getter;
+
+  Future<M.Class> getObject(){
+    if (_object != null) {
+      return _object();
+    }
+    return new Future.value(null);
+  }
+
+  Future<M.Class> get(String id){
+    if (_get != null) {
+      return _get(id);
+    }
+    return new Future.value(null);
+  }
+}