blob: b6d3ba8444ece388f14a5ec13ad3c80a8ed2862a [file] [log] [blame]
// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'package:flutter/scheduler.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets('Nested TickerMode cannot turn tickers back on', (WidgetTester tester) async {
int outerTickCount = 0;
int innerTickCount = 0;
Widget nestedTickerModes({bool innerEnabled, bool outerEnabled}) {
return Directionality(
textDirection: TextDirection.rtl,
child: TickerMode(
enabled: outerEnabled,
child: Row(
children: <Widget>[
_TickingWidget(
onTick: () {
outerTickCount++;
},
),
TickerMode(
enabled: innerEnabled,
child: _TickingWidget(
onTick: () {
innerTickCount++;
},
),
),
],
),
),
);
}
await tester.pumpWidget(
nestedTickerModes(
outerEnabled: false,
innerEnabled: true,
),
);
expect(outerTickCount, 0);
expect(innerTickCount, 0);
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
expect(outerTickCount, 0);
expect(innerTickCount, 0);
await tester.pumpWidget(
nestedTickerModes(
outerEnabled: true,
innerEnabled: false,
),
);
outerTickCount = 0;
innerTickCount = 0;
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
expect(outerTickCount, 4);
expect(innerTickCount, 0);
await tester.pumpWidget(
nestedTickerModes(
outerEnabled: true,
innerEnabled: true,
),
);
outerTickCount = 0;
innerTickCount = 0;
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
expect(outerTickCount, 4);
expect(innerTickCount, 4);
await tester.pumpWidget(
nestedTickerModes(
outerEnabled: false,
innerEnabled: false,
),
);
outerTickCount = 0;
innerTickCount = 0;
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
await tester.pump(const Duration(seconds: 1));
expect(outerTickCount, 0);
expect(innerTickCount, 0);
});
}
class _TickingWidget extends StatefulWidget {
const _TickingWidget({this.onTick});
final VoidCallback onTick;
@override
State<_TickingWidget> createState() => _TickingWidgetState();
}
class _TickingWidgetState extends State<_TickingWidget> with SingleTickerProviderStateMixin {
Ticker _ticker;
@override
void initState() {
super.initState();
_ticker = createTicker((Duration _) {
widget.onTick();
})..start();
}
@override
Widget build(BuildContext context) {
return Container();
}
@override
void dispose() {
_ticker.dispose();
super.dispose();
}
}