| 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 'package:flutter/material.dart'; |
| 6 | import 'package:flutter_api_samples/material/button_style/button_style.0.dart' as example; |
| 7 | import 'package:flutter_test/flutter_test.dart'; |
| 8 | |
| 9 | void main() { |
| 10 | testWidgets( |
| 11 | 'Shows ElevatedButtons, FilledButtons, OutlinedButtons and TextButtons in enabled and disabled states', |
| 12 | (WidgetTester tester) async { |
| 13 | await tester.pumpWidget(const example.ButtonApp()); |
| 14 | |
| 15 | expect( |
| 16 | find.byWidgetPredicate((Widget widget) { |
| 17 | return widget is ElevatedButton && widget.onPressed == null; |
| 18 | }), |
| 19 | findsOne, |
| 20 | ); |
| 21 | |
| 22 | expect( |
| 23 | find.byWidgetPredicate((Widget widget) { |
| 24 | return widget is ElevatedButton && widget.onPressed != null; |
| 25 | }), |
| 26 | findsOne, |
| 27 | ); |
| 28 | |
| 29 | // One OutlinedButton with onPressed null. |
| 30 | expect( |
| 31 | find.byWidgetPredicate((Widget widget) { |
| 32 | return widget is OutlinedButton && widget.onPressed == null; |
| 33 | }), |
| 34 | findsOne, |
| 35 | ); |
| 36 | |
| 37 | // One OutlinedButton with onPressed not null. |
| 38 | expect( |
| 39 | find.byWidgetPredicate((Widget widget) { |
| 40 | return widget is OutlinedButton && widget.onPressed != null; |
| 41 | }), |
| 42 | findsOne, |
| 43 | ); |
| 44 | |
| 45 | expect( |
| 46 | find.byWidgetPredicate((Widget widget) { |
| 47 | return widget is TextButton && widget.onPressed == null; |
| 48 | }), |
| 49 | findsOne, |
| 50 | ); |
| 51 | |
| 52 | expect( |
| 53 | find.byWidgetPredicate((Widget widget) { |
| 54 | return widget is TextButton && widget.onPressed != null; |
| 55 | }), |
| 56 | findsOne, |
| 57 | ); |
| 58 | |
| 59 | expect( |
| 60 | find.byWidgetPredicate((Widget widget) { |
| 61 | return widget is FilledButton && widget.onPressed != null; |
| 62 | }), |
| 63 | findsNWidgets(2), |
| 64 | ); |
| 65 | |
| 66 | expect( |
| 67 | find.byWidgetPredicate((Widget widget) { |
| 68 | return widget is FilledButton && widget.onPressed == null; |
| 69 | }), |
| 70 | findsNWidgets(2), |
| 71 | ); |
| 72 | }, |
| 73 | ); |
| 74 | } |
| 75 |