1+ // Copyright 2014 The Flutter Authors. All rights reserved.
2+ // Use of this source code is governed by a BSD-style license that can be
3+ // found in the LICENSE file.
4+
5+ import 'dart:async' ;
6+ import 'dart:convert' ;
7+
8+ import 'package:flutter/foundation.dart' ;
9+ import 'package:flutter/rendering.dart' ;
10+ import 'package:flutter/widgets.dart' ;
11+ import 'package:flutter_test/flutter_test.dart' ;
12+
13+ void main () {
14+ StructureErrorTestWidgetInspectorService .runTests ();
15+ }
16+
17+ typedef InspectorServiceExtensionCallback = FutureOr <Map <String , Object >> Function (Map <String , String > parameters);
18+
19+ class StructureErrorTestWidgetInspectorService extends Object with WidgetInspectorService {
20+ final Map <String , InspectorServiceExtensionCallback > extensions = < String , InspectorServiceExtensionCallback > {};
21+
22+ final Map <String , List <Map <Object , Object >>> eventsDispatched = < String , List <Map <Object , Object >>> {};
23+
24+ @override
25+ void registerServiceExtension ({
26+ @required String name,
27+ @required FutureOr <Map <String , Object >> callback (Map <String , String > parameters),
28+ }) {
29+ assert (! extensions.containsKey (name));
30+ extensions[name] = callback;
31+ }
32+
33+ @override
34+ void postEvent (String eventKind, Map <Object , Object > eventData) {
35+ getEventsDispatched (eventKind).add (eventData);
36+ }
37+
38+ List <Map <Object , Object >> getEventsDispatched (String eventKind) {
39+ return eventsDispatched.putIfAbsent (eventKind, () => < Map <Object , Object >> []);
40+ }
41+
42+ Iterable <Map <Object , Object >> getServiceExtensionStateChangedEvents (String extensionName) {
43+ return getEventsDispatched ('Flutter.ServiceExtensionStateChanged' )
44+ .where ((Map <Object , Object > event) => event['extension' ] == extensionName);
45+ }
46+
47+ Future <String > testBoolExtension (String name, Map <String , String > arguments) async {
48+ expect (extensions, contains (name));
49+ // Encode and decode to JSON to match behavior using a real service
50+ // extension where only JSON is allowed.
51+ return json.decode (json.encode (await extensions[name](arguments)))['enabled' ] as String ;
52+ }
53+
54+
55+ static void runTests () {
56+ final StructureErrorTestWidgetInspectorService service = StructureErrorTestWidgetInspectorService ();
57+ WidgetInspectorService .instance = service;
58+
59+ test ('ext.flutter.inspector.structuredErrors still report error to original on error' , () async {
60+ final FlutterExceptionHandler oldHandler = FlutterError .onError;
61+
62+ FlutterErrorDetails actualError;
63+ // Creates a spy onError. This spy needs to be set before widgets binding
64+ // initializes.
65+ FlutterError .onError = (FlutterErrorDetails details) {
66+ actualError = details;
67+ };
68+
69+ WidgetsFlutterBinding .ensureInitialized ();
70+ try {
71+ // Enables structured errors.
72+ expect (await service.testBoolExtension (
73+ 'structuredErrors' , < String , String > {'enabled' : 'true' }),
74+ equals ('true' ));
75+
76+ // Creates an error.
77+ final FlutterErrorDetails expectedError = FlutterErrorDetailsForRendering (
78+ library: 'rendering library' ,
79+ context: ErrorDescription ('during layout' ),
80+ exception: StackTrace .current,
81+ );
82+ FlutterError .reportError (expectedError);
83+
84+ // Validates the spy still received an error.
85+ expect (actualError, expectedError);
86+ } finally {
87+ FlutterError .onError = oldHandler;
88+ }
89+ });
90+ }
91+ }
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