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Channels don't preserve Map and List type arguments: Map<String, Object> arrives as Map<dynamic, dynamic> to the receiver. In Dart 2 type system dynamic no longer serves as bottom type so Map<dynamic, dynamic> can't be assign to a variable of type Map<String, dynamic>. Issue #14556
29 lines
1.1 KiB
Dart
29 lines
1.1 KiB
Dart
// Copyright 2017 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'dart:ui' show TextDirection;
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import 'package:flutter/semantics.dart';
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import 'package:flutter/services.dart' show SystemChannels;
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import 'package:test/test.dart';
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void main() {
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test('Semantic announcement', () async {
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final List<Map<dynamic, dynamic>> log = <Map<dynamic, dynamic>>[];
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SystemChannels.accessibility.setMockMessageHandler((Object mockMessage) async {
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final Map<dynamic, dynamic> message = mockMessage;
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log.add(message);
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});
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await SemanticsService.announce('announcement 1', TextDirection.ltr);
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await SemanticsService.announce('announcement 2', TextDirection.rtl);
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expect(log, equals(<Map<String, dynamic>>[
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<String, dynamic> {'type': 'announce', 'data': <String, dynamic> {'message': 'announcement 1', 'textDirection': 1}},
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<String, dynamic> {'type': 'announce', 'data': <String, dynamic> {'message': 'announcement 2', 'textDirection': 0}},
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]));
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});
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}
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