aae2426000
This should handle a case like a stateful component inside a Container inside another Container having one of those Containers removed while still keeping that stateful component around with its state. The problem of how to handle the Container then being reinserted is a separate issue not handled by this patch.
95 lines
1.9 KiB
Dart
95 lines
1.9 KiB
Dart
import 'package:sky/widgets.dart';
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import 'package:test/test.dart';
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import 'widget_tester.dart';
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class TestState extends StatefulComponent {
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TestState({this.child, this.state});
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Widget child;
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int state;
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int syncs = 0;
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void syncConstructorArguments(TestState source) {
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child = source.child;
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// we explicitly do NOT sync the state from the new instance
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// because we're using that to track whether we got recreated
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syncs += 1;
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}
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Widget build() {
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return child;
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}
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}
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void main() {
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test('no change', () {
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WidgetTester tester = new WidgetTester();
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tester.pumpFrame(() {
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return new Container(
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child: new Container(
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child: new TestState(
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state: 1,
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child: new Container()
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)
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)
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);
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});
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TestState stateWidget = tester.findWidget((widget) => widget is TestState);
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expect(stateWidget.state, equals(1));
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expect(stateWidget.syncs, equals(0));
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tester.pumpFrame(() {
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return new Container(
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child: new Container(
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child: new TestState(
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state: 2,
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child: new Container()
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)
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)
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);
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});
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expect(stateWidget.state, equals(1));
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expect(stateWidget.syncs, equals(1));
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});
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test('remove one', () {
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WidgetTester tester = new WidgetTester();
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tester.pumpFrame(() {
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return new Container(
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child: new Container(
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child: new TestState(
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state: 10,
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child: new Container()
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)
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)
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);
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});
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TestState stateWidget = tester.findWidget((widget) => widget is TestState);
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expect(stateWidget.state, equals(10));
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expect(stateWidget.syncs, equals(0));
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tester.pumpFrame(() {
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return new Container(
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child: new TestState(
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state: 11,
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child: new Container()
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)
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);
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});
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expect(stateWidget.state, equals(10));
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expect(stateWidget.syncs, equals(1));
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});
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}
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