Converted Observatory heap-snapshot element

runtime/observatory/tests/observatory_ui/mocks/objects/heap_snapshot.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;
+
+class HeapSnapshotMock implements M.HeapSnapshot {
+  final DateTime timestamp;
+  final int objects;
+  final int references;
+  final int size;
+  final M.HeapSnapshotDominatorNode dominatorTree;
+  final Iterable<M.HeapSnapshotClassReferences> classReferences;
+
+  const HeapSnapshotMock({this.timestamp, this.objects: 0,
+      this.references: 0, this.size: 0,
+      this.dominatorTree: const HeapSnapshotDominatorNodeMock(),
+      this.classReferences: const []});
+}
+
+class HeapSnapshotDominatorNodeMock implements M.HeapSnapshotDominatorNode {
+  final int shallowSize;
+  final int retainedSize;
+  final Future<M.ObjectRef> object;
+  final Iterable<M.HeapSnapshotDominatorNode> children;
+
+  const HeapSnapshotDominatorNodeMock({this.shallowSize: 1,
+                                       this.retainedSize: 1,
+                                       this.object, this.children: const []});
+}
+
+class HeapSnapshotClassReferencesMock implements M.HeapSnapshotClassReferences {
+  final M.ClassRef clazz;
+  final int instances;
+  final int shallowSize;
+  final int retainedSize;
+  final Iterable<M.HeapSnapshotClassInbound> inbounds;
+  final Iterable<M.HeapSnapshotClassOutbound> outbounds;
+
+  const HeapSnapshotClassReferencesMock({this.clazz: const ClassRefMock(),
+                                         this.instances: 1, this.shallowSize: 1,
+                                         this.retainedSize: 2,
+                                         this.inbounds: const [],
+                                         this.outbounds: const []});
+}
+
+class HeapSnapshotClassInboundMock implements M.HeapSnapshotClassInbound {
+  final M.ClassRef source;
+  final int count;
+  final int shallowSize;
+  final int retainedSize;
+
+  const HeapSnapshotClassInboundMock({this.source: const ClassRefMock(),
+                                      this.count: 1, this.shallowSize: 1,
+                                      this.retainedSize: 2});
+}
+
+class HeapSnapshotClassOutboundMock implements M.HeapSnapshotClassOutbound {
+  final M.ClassRef target;
+  final int count;
+  final int shallowSize;
+  final int retainedSize;
+  const HeapSnapshotClassOutboundMock({this.target: const ClassRefMock(),
+                                       this.count: 1, this.shallowSize: 1,
+                                       this.retainedSize: 2});
+}