blob: ef352d6107335a2b761a02466b3033a66599c481 [file] [log] [blame]
// Copyright 2015 The Chromium 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_test/flutter_test.dart';
import 'package:flutter/widgets.dart';
class StateMarker extends StatefulWidget {
const StateMarker({ Key key, this.child }) : super(key: key);
final Widget child;
@override
StateMarkerState createState() => new StateMarkerState();
}
class StateMarkerState extends State<StateMarker> {
String marker;
@override
Widget build(BuildContext context) {
if (widget.child != null)
return widget.child;
return new Container();
}
}
class DeactivateLogger extends StatefulWidget {
const DeactivateLogger({ Key key, this.log }) : super(key: key);
final List<String> log;
@override
DeactivateLoggerState createState() => new DeactivateLoggerState();
}
class DeactivateLoggerState extends State<DeactivateLogger> {
@override
void deactivate() {
widget.log.add('deactivate');
super.deactivate();
}
@override
Widget build(BuildContext context) {
widget.log.add('build');
return new Container();
}
}
void main() {
testWidgets('can reparent state', (WidgetTester tester) async {
final GlobalKey left = new GlobalKey();
final GlobalKey right = new GlobalKey();
const StateMarker grandchild = const StateMarker();
await tester.pumpWidget(
new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new Container(
child: new StateMarker(key: left)
),
new Container(
child: new StateMarker(
key: right,
child: grandchild
)
),
]
)
);
final StateMarkerState leftState = left.currentState;
leftState.marker = 'left';
final StateMarkerState rightState = right.currentState;
rightState.marker = 'right';
final StateMarkerState grandchildState = tester.state(find.byWidget(grandchild));
expect(grandchildState, isNotNull);
grandchildState.marker = 'grandchild';
const StateMarker newGrandchild = const StateMarker();
await tester.pumpWidget(
new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new Container(
child: new StateMarker(
key: right,
child: newGrandchild
)
),
new Container(
child: new StateMarker(key: left)
),
]
)
);
expect(left.currentState, equals(leftState));
expect(leftState.marker, equals('left'));
expect(right.currentState, equals(rightState));
expect(rightState.marker, equals('right'));
final StateMarkerState newGrandchildState = tester.state(find.byWidget(newGrandchild));
expect(newGrandchildState, isNotNull);
expect(newGrandchildState, equals(grandchildState));
expect(newGrandchildState.marker, equals('grandchild'));
await tester.pumpWidget(
new Center(
child: new Container(
child: new StateMarker(
key: left,
child: new Container()
)
)
)
);
expect(left.currentState, equals(leftState));
expect(leftState.marker, equals('left'));
expect(right.currentState, isNull);
});
testWidgets('can reparent state with multichild widgets', (WidgetTester tester) async {
final GlobalKey left = new GlobalKey();
final GlobalKey right = new GlobalKey();
const StateMarker grandchild = const StateMarker();
await tester.pumpWidget(
new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new StateMarker(key: left),
new StateMarker(
key: right,
child: grandchild
)
]
)
);
final StateMarkerState leftState = left.currentState;
leftState.marker = 'left';
final StateMarkerState rightState = right.currentState;
rightState.marker = 'right';
final StateMarkerState grandchildState = tester.state(find.byWidget(grandchild));
expect(grandchildState, isNotNull);
grandchildState.marker = 'grandchild';
const StateMarker newGrandchild = const StateMarker();
await tester.pumpWidget(
new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new StateMarker(
key: right,
child: newGrandchild
),
new StateMarker(key: left)
]
)
);
expect(left.currentState, equals(leftState));
expect(leftState.marker, equals('left'));
expect(right.currentState, equals(rightState));
expect(rightState.marker, equals('right'));
final StateMarkerState newGrandchildState = tester.state(find.byWidget(newGrandchild));
expect(newGrandchildState, isNotNull);
expect(newGrandchildState, equals(grandchildState));
expect(newGrandchildState.marker, equals('grandchild'));
await tester.pumpWidget(
new Center(
child: new Container(
child: new StateMarker(
key: left,
child: new Container()
)
)
)
);
expect(left.currentState, equals(leftState));
expect(leftState.marker, equals('left'));
expect(right.currentState, isNull);
});
testWidgets('can with scrollable list', (WidgetTester tester) async {
final GlobalKey key = new GlobalKey();
await tester.pumpWidget(new StateMarker(key: key));
final StateMarkerState keyState = key.currentState;
keyState.marker = 'marked';
await tester.pumpWidget(
new Directionality(
textDirection: TextDirection.ltr,
child: new ListView(
itemExtent: 100.0,
children: <Widget>[
new Container(
key: const Key('container'),
height: 100.0,
child: new StateMarker(key: key),
),
],
),
),
);
expect(key.currentState, equals(keyState));
expect(keyState.marker, equals('marked'));
await tester.pumpWidget(new StateMarker(key: key));
expect(key.currentState, equals(keyState));
expect(keyState.marker, equals('marked'));
});
testWidgets('Reparent during update children', (WidgetTester tester) async {
final GlobalKey key = new GlobalKey();
await tester.pumpWidget(new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new StateMarker(key: key),
new Container(width: 100.0, height: 100.0),
]
));
final StateMarkerState keyState = key.currentState;
keyState.marker = 'marked';
await tester.pumpWidget(new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new Container(width: 100.0, height: 100.0),
new StateMarker(key: key),
]
));
expect(key.currentState, equals(keyState));
expect(keyState.marker, equals('marked'));
await tester.pumpWidget(new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new StateMarker(key: key),
new Container(width: 100.0, height: 100.0),
]
));
expect(key.currentState, equals(keyState));
expect(keyState.marker, equals('marked'));
});
testWidgets('Reparent to child during update children', (WidgetTester tester) async {
final GlobalKey key = new GlobalKey();
await tester.pumpWidget(new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new Container(width: 100.0, height: 100.0),
new StateMarker(key: key),
new Container(width: 100.0, height: 100.0),
]
));
final StateMarkerState keyState = key.currentState;
keyState.marker = 'marked';
await tester.pumpWidget(new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new Container(width: 100.0, height: 100.0, child: new StateMarker(key: key)),
new Container(width: 100.0, height: 100.0),
]
));
expect(key.currentState, equals(keyState));
expect(keyState.marker, equals('marked'));
await tester.pumpWidget(new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new Container(width: 100.0, height: 100.0),
new StateMarker(key: key),
new Container(width: 100.0, height: 100.0),
]
));
expect(key.currentState, equals(keyState));
expect(keyState.marker, equals('marked'));
await tester.pumpWidget(new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new Container(width: 100.0, height: 100.0),
new Container(width: 100.0, height: 100.0, child: new StateMarker(key: key)),
]
));
expect(key.currentState, equals(keyState));
expect(keyState.marker, equals('marked'));
await tester.pumpWidget(new Stack(
textDirection: TextDirection.ltr,
children: <Widget>[
new Container(width: 100.0, height: 100.0),
new StateMarker(key: key),
new Container(width: 100.0, height: 100.0),
]
));
expect(key.currentState, equals(keyState));
expect(keyState.marker, equals('marked'));
});
testWidgets('Deactivate implies build', (WidgetTester tester) async {
final GlobalKey key = new GlobalKey();
final List<String> log = <String>[];
final DeactivateLogger logger = new DeactivateLogger(key: key, log: log);
await tester.pumpWidget(
new Container(key: new UniqueKey(), child: logger)
);
expect(log, equals(<String>['build']));
await tester.pumpWidget(
new Container(key: new UniqueKey(), child: logger)
);
expect(log, equals(<String>['build', 'deactivate', 'build']));
log.clear();
await tester.pump();
expect(log, isEmpty);
});
testWidgets('Reparenting with multiple moves', (WidgetTester tester) async {
final GlobalKey key1 = new GlobalKey();
final GlobalKey key2 = new GlobalKey();
final GlobalKey key3 = new GlobalKey();
await tester.pumpWidget(
new Row(
textDirection: TextDirection.ltr,
children: <Widget>[
new StateMarker(
key: key1,
child: new StateMarker(
key: key2,
child: new StateMarker(
key: key3,
child: new StateMarker(child: new Container(width: 100.0))
)
)
)
]
)
);
await tester.pumpWidget(
new Row(
textDirection: TextDirection.ltr,
children: <Widget>[
new StateMarker(
key: key2,
child: new StateMarker(child: new Container(width: 100.0))
),
new StateMarker(
key: key1,
child: new StateMarker(
key: key3,
child: new StateMarker(child: new Container(width: 100.0))
)
),
]
)
);
});
}