Converted Observatory object-common element

runtime/observatory/tests/observatory_ui/retaining_path/element_test.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.
+
+import 'dart:html';
+import 'package:unittest/unittest.dart';
+import 'package:observatory/src/elements/curly_block.dart';
+import 'package:observatory/src/elements/instance_ref.dart';
+import 'package:observatory/src/elements/retaining_path.dart';
+import '../mocks.dart';
+
+main() {
+  RetainingPathElement.tag.ensureRegistration();
+
+  final cTag = CurlyBlockElement.tag.name;
+  final iTag = InstanceRefElement.tag.name;
+
+  const isolate = const IsolateRefMock();
+  const object = const InstanceRefMock();
+  final paths = new RetainingPathRepositoryMock();
+  final instances = new InstanceRepositoryMock();
+  test('instantiation', () {
+    final e = new RetainingPathElement(isolate, object, paths, instances);
+    expect(e, isNotNull, reason: 'element correctly created');
+    expect(e.isolate, equals(isolate));
+    expect(e.object, equals(object));
+  });
+  test('elements created after attachment', () async {
+    const source = const InstanceRefMock(id: 'source-id', name: 'source_name');
+    const path = const RetainingPathMock(elements: const [
+      const RetainingPathItemMock(source: source)
+    ]);
+    bool invoked = false;
+    final paths = new RetainingPathRepositoryMock(
+      getter: expectAsync((i, id) async {
+        expect(i, equals(isolate));
+        expect(id, equals(object.id));
+        invoked = true;
+        return path;
+      }, count: 1)
+    );
+    final instances = new InstanceRepositoryMock();
+    final e = new RetainingPathElement(isolate, object, paths, instances);
+    document.body.append(e);
+    await e.onRendered.first;
+    expect(invoked, isFalse);
+    expect(e.children.length, isNonZero, reason: 'has elements');
+    expect(e.querySelectorAll(iTag).length, isZero);
+    (e.querySelector(cTag) as CurlyBlockElement).toggle();
+    await e.onRendered.first;
+    expect(invoked, isTrue);
+    expect(e.querySelectorAll(iTag).length, equals(1));
+    e.remove();
+    await e.onRendered.first;
+    expect(e.children.length, isZero, reason: 'is empty');
+  });
+}