Converted Observatory error-ref element

runtime/observatory/tests/observatory_ui/error_ref/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/models.dart';
 import 'package:observatory/mocks.dart';
-import 'package:observatory/src/elements/code_ref.dart';
+import 'package:observatory/src/elements/error_ref.dart';
 
-main(){
-  CodeRefElement.tag.ensureRegistration();
+main() {
+  ErrorRefElement.tag.ensureRegistration();
 
-  final IsolateRefMock isolate = new IsolateRefMock(id: 'i-id', name: 'i-name');
-  final CodeRefMock code = new CodeRefMock(id: 'c-id', name: 'c-name');
+  final ErrorRef ref = new ErrorRefMock(id: 'id', message: 'fixed-error-m');
   test('instantiation', () {
-    final CodeRefElement e = new CodeRefElement(isolate, code);
+    final ErrorRefElement e = new ErrorRefElement(ref);
     expect(e, isNotNull, reason: 'element correctly created');
-    expect(e.isolate, equals(isolate));
-    expect(e.code, equals(code));
+    expect(e.error, equals(ref));
   });
   test('elements created after attachment', () async {
-    final CodeRefElement e = new CodeRefElement(isolate, code);
+    final ErrorRefElement e = new ErrorRefElement(ref);
     document.body.append(e);
     await e.onRendered.first;
     expect(e.children.length, isNonZero, reason: 'has elements');
+    expect(e.innerHtml.contains(ref.message), isTrue,
+      reason: 'no message in the component');
     e.remove();
     await e.onRendered.first;
-    expect(e.children.length, isZero, reason: 'is empty');
+    expect(e.children.length, isZero,
+      reason: 'is empty');
   });
 }