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// Copyright 2019 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/foundation.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
final GlobalKey widgetKey = GlobalKey();
Future<BuildContext> setupWidget(WidgetTester tester) async {
await tester.pumpWidget(Container(key: widgetKey));
return widgetKey.currentContext;
}
group(FocusNode, () {
testWidgets('Can add children.', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusNode parent = FocusNode();
final FocusAttachment parentAttachment = parent.attach(context);
final FocusNode child1 = FocusNode();
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode();
final FocusAttachment child2Attachment = child2.attach(context);
parentAttachment.reparent(parent: tester.binding.focusManager.rootScope);
child1Attachment.reparent(parent: parent);
expect(child1.parent, equals(parent));
expect(parent.children.first, equals(child1));
expect(parent.children.last, equals(child1));
child2Attachment.reparent(parent: parent);
expect(child1.parent, equals(parent));
expect(child2.parent, equals(parent));
expect(parent.children.first, equals(child1));
expect(parent.children.last, equals(child2));
});
testWidgets('Can remove children.', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusNode parent = FocusNode();
final FocusAttachment parentAttachment = parent.attach(context);
final FocusNode child1 = FocusNode();
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode();
final FocusAttachment child2Attachment = child2.attach(context);
parentAttachment.reparent(parent: tester.binding.focusManager.rootScope);
child1Attachment.reparent(parent: parent);
child2Attachment.reparent(parent: parent);
expect(child1.parent, equals(parent));
expect(child2.parent, equals(parent));
expect(parent.children.first, equals(child1));
expect(parent.children.last, equals(child2));
child1Attachment.detach();
expect(child1.parent, isNull);
expect(child2.parent, equals(parent));
expect(parent.children.first, equals(child2));
expect(parent.children.last, equals(child2));
child2Attachment.detach();
expect(child1.parent, isNull);
expect(child2.parent, isNull);
expect(parent.children, isEmpty);
});
testWidgets('implements debugFillProperties', (WidgetTester tester) async {
final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
FocusNode(
debugLabel: 'Label',
).debugFillProperties(builder);
final List<String> description = builder.properties.map((DiagnosticsNode n) => n.toString()).toList();
expect(description, <String>[
'context: null',
'canRequestFocus: true',
'hasFocus: false',
'hasPrimaryFocus: false'
]);
});
});
group(FocusScopeNode, () {
testWidgets('Can setFirstFocus on a scope with no manager.', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope = FocusScopeNode(debugLabel: 'Scope');
scope.attach(context);
final FocusScopeNode parent = FocusScopeNode(debugLabel: 'Parent');
parent.attach(context);
final FocusScopeNode child1 = FocusScopeNode(debugLabel: 'Child 1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusScopeNode child2 = FocusScopeNode(debugLabel: 'Child 2');
child2.attach(context);
scope.setFirstFocus(parent);
parent.setFirstFocus(child1);
parent.setFirstFocus(child2);
child1.requestFocus();
await tester.pump();
expect(scope.hasFocus, isFalse);
expect(child1.hasFocus, isFalse);
expect(child1.hasPrimaryFocus, isFalse);
expect(scope.focusedChild, equals(parent));
expect(parent.focusedChild, equals(child1));
child1Attachment.detach();
expect(scope.hasFocus, isFalse);
expect(scope.focusedChild, equals(parent));
});
testWidgets('Removing a node removes it from scope.', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope = FocusScopeNode();
final FocusAttachment scopeAttachment = scope.attach(context);
final FocusNode parent = FocusNode();
final FocusAttachment parentAttachment = parent.attach(context);
final FocusNode child1 = FocusNode();
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode();
final FocusAttachment child2Attachment = child2.attach(context);
scopeAttachment.reparent(parent: tester.binding.focusManager.rootScope);
parentAttachment.reparent(parent: scope);
child1Attachment.reparent(parent: parent);
child2Attachment.reparent(parent: parent);
child1.requestFocus();
await tester.pump();
expect(scope.hasFocus, isTrue);
expect(child1.hasFocus, isTrue);
expect(child1.hasPrimaryFocus, isTrue);
expect(scope.focusedChild, equals(child1));
child1Attachment.detach();
expect(scope.hasFocus, isFalse);
expect(scope.focusedChild, isNull);
});
testWidgets('Can add children to scope and focus', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope = FocusScopeNode();
final FocusAttachment scopeAttachment = scope.attach(context);
final FocusNode parent = FocusNode();
final FocusAttachment parentAttachment = parent.attach(context);
final FocusNode child1 = FocusNode();
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode();
final FocusAttachment child2Attachment = child2.attach(context);
scopeAttachment.reparent(parent: tester.binding.focusManager.rootScope);
parentAttachment.reparent(parent: scope);
child1Attachment.reparent(parent: parent);
child2Attachment.reparent(parent: parent);
expect(scope.children.first, equals(parent));
expect(parent.parent, equals(scope));
expect(child1.parent, equals(parent));
expect(child2.parent, equals(parent));
expect(parent.children.first, equals(child1));
expect(parent.children.last, equals(child2));
child1.requestFocus();
await tester.pump();
expect(scope.focusedChild, equals(child1));
expect(parent.hasFocus, isTrue);
expect(parent.hasPrimaryFocus, isFalse);
expect(child1.hasFocus, isTrue);
expect(child1.hasPrimaryFocus, isTrue);
expect(child2.hasFocus, isFalse);
expect(child2.hasPrimaryFocus, isFalse);
child2.requestFocus();
await tester.pump();
expect(scope.focusedChild, equals(child2));
expect(parent.hasFocus, isTrue);
expect(parent.hasPrimaryFocus, isFalse);
expect(child1.hasFocus, isFalse);
expect(child1.hasPrimaryFocus, isFalse);
expect(child2.hasFocus, isTrue);
expect(child2.hasPrimaryFocus, isTrue);
});
testWidgets('Autofocus works.', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope = FocusScopeNode(debugLabel: 'Scope');
final FocusAttachment scopeAttachment = scope.attach(context);
final FocusNode parent = FocusNode(debugLabel: 'Parent');
final FocusAttachment parentAttachment = parent.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'Child 1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(debugLabel: 'Child 2');
final FocusAttachment child2Attachment = child2.attach(context);
scopeAttachment.reparent(parent: tester.binding.focusManager.rootScope);
parentAttachment.reparent(parent: scope);
child1Attachment.reparent(parent: parent);
child2Attachment.reparent(parent: parent);
scope.autofocus(child2);
await tester.pump();
expect(scope.focusedChild, equals(child2));
expect(parent.hasFocus, isTrue);
expect(child1.hasFocus, isFalse);
expect(child1.hasPrimaryFocus, isFalse);
expect(child2.hasFocus, isTrue);
expect(child2.hasPrimaryFocus, isTrue);
child1.requestFocus();
scope.autofocus(child2);
await tester.pump();
expect(scope.focusedChild, equals(child1));
expect(parent.hasFocus, isTrue);
expect(child1.hasFocus, isTrue);
expect(child1.hasPrimaryFocus, isTrue);
expect(child2.hasFocus, isFalse);
expect(child2.hasPrimaryFocus, isFalse);
});
testWidgets('Adding a focusedChild to a scope sets scope as focusedChild in parent scope', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope1 = FocusScopeNode();
final FocusAttachment scope1Attachment = scope1.attach(context);
final FocusScopeNode scope2 = FocusScopeNode();
final FocusAttachment scope2Attachment = scope2.attach(context);
final FocusNode child1 = FocusNode();
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode();
final FocusAttachment child2Attachment = child2.attach(context);
scope1Attachment.reparent(parent: tester.binding.focusManager.rootScope);
scope2Attachment.reparent(parent: scope1);
child1Attachment.reparent(parent: scope1);
child2Attachment.reparent(parent: scope2);
child2.requestFocus();
await tester.pump();
expect(scope2.focusedChild, equals(child2));
expect(scope1.focusedChild, equals(scope2));
expect(child1.hasFocus, isFalse);
expect(child1.hasPrimaryFocus, isFalse);
expect(child2.hasFocus, isTrue);
expect(child2.hasPrimaryFocus, isTrue);
child1.requestFocus();
await tester.pump();
expect(scope2.focusedChild, equals(child2));
expect(scope1.focusedChild, equals(child1));
expect(child1.hasFocus, isTrue);
expect(child1.hasPrimaryFocus, isTrue);
expect(child2.hasFocus, isFalse);
expect(child2.hasPrimaryFocus, isFalse);
});
testWidgets('Can move node with focus without losing focus', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope = FocusScopeNode(debugLabel: 'Scope');
final FocusAttachment scopeAttachment = scope.attach(context);
final FocusNode parent1 = FocusNode(debugLabel: 'Parent 1');
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode(debugLabel: 'Parent 2');
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'Child 1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(debugLabel: 'Child 2');
final FocusAttachment child2Attachment = child2.attach(context);
scopeAttachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope);
parent2Attachment.reparent(parent: scope);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
expect(scope.children.first, equals(parent1));
expect(scope.children.last, equals(parent2));
expect(parent1.parent, equals(scope));
expect(parent2.parent, equals(scope));
expect(child1.parent, equals(parent1));
expect(child2.parent, equals(parent1));
expect(parent1.children.first, equals(child1));
expect(parent1.children.last, equals(child2));
child1.requestFocus();
await tester.pump();
child1Attachment.reparent(parent: parent2);
await tester.pump();
expect(scope.focusedChild, equals(child1));
expect(child1.parent, equals(parent2));
expect(child2.parent, equals(parent1));
expect(parent1.children.first, equals(child2));
expect(parent2.children.first, equals(child1));
});
testWidgets('canRequestFocus affects children.', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope = FocusScopeNode(debugLabel: 'Scope', canRequestFocus: true);
final FocusAttachment scopeAttachment = scope.attach(context);
final FocusNode parent1 = FocusNode(debugLabel: 'Parent 1');
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode(debugLabel: 'Parent 2');
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'Child 1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(debugLabel: 'Child 2');
final FocusAttachment child2Attachment = child2.attach(context);
scopeAttachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope);
parent2Attachment.reparent(parent: scope);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
child1.requestFocus();
await tester.pump();
expect(tester.binding.focusManager.primaryFocus, equals(child1));
expect(scope.focusedChild, equals(child1));
expect(scope.traversalDescendants.contains(child1), isTrue);
expect(scope.traversalDescendants.contains(child2), isTrue);
scope.canRequestFocus = false;
await tester.pump();
child2.requestFocus();
await tester.pump();
expect(tester.binding.focusManager.primaryFocus, isNot(equals(child2)));
expect(tester.binding.focusManager.primaryFocus, isNot(equals(child1)));
expect(scope.focusedChild, isNull);
expect(scope.traversalDescendants.contains(child1), isFalse);
expect(scope.traversalDescendants.contains(child2), isFalse);
});
testWidgets("skipTraversal doesn't affect children.", (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope = FocusScopeNode(debugLabel: 'Scope', skipTraversal: false);
final FocusAttachment scopeAttachment = scope.attach(context);
final FocusNode parent1 = FocusNode(debugLabel: 'Parent 1');
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode(debugLabel: 'Parent 2');
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'Child 1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(debugLabel: 'Child 2');
final FocusAttachment child2Attachment = child2.attach(context);
scopeAttachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope);
parent2Attachment.reparent(parent: scope);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
child1.requestFocus();
await tester.pump();
expect(tester.binding.focusManager.primaryFocus, equals(child1));
expect(scope.focusedChild, equals(child1));
expect(tester.binding.focusManager.rootScope.traversalDescendants.contains(scope), isTrue);
expect(scope.traversalDescendants.contains(child1), isTrue);
expect(scope.traversalDescendants.contains(child2), isTrue);
scope.skipTraversal = true;
await tester.pump();
expect(tester.binding.focusManager.primaryFocus, equals(child1));
expect(scope.focusedChild, equals(child1));
expect(tester.binding.focusManager.rootScope.traversalDescendants.contains(scope), isFalse);
expect(scope.traversalDescendants.contains(child1), isTrue);
expect(scope.traversalDescendants.contains(child2), isTrue);
});
testWidgets('Can move node between scopes and lose scope focus', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope1 = FocusScopeNode(debugLabel: 'scope1')..attach(context);
final FocusAttachment scope1Attachment = scope1.attach(context);
final FocusScopeNode scope2 = FocusScopeNode(debugLabel: 'scope2');
final FocusAttachment scope2Attachment = scope2.attach(context);
final FocusNode parent1 = FocusNode(debugLabel: 'parent1');
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode(debugLabel: 'parent2');
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'child1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(debugLabel: 'child2');
final FocusAttachment child2Attachment = child2.attach(context);
final FocusNode child3 = FocusNode(debugLabel: 'child3');
final FocusAttachment child3Attachment = child3.attach(context);
final FocusNode child4 = FocusNode(debugLabel: 'child4');
final FocusAttachment child4Attachment = child4.attach(context);
scope1Attachment.reparent(parent: tester.binding.focusManager.rootScope);
scope2Attachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope1);
parent2Attachment.reparent(parent: scope2);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
child3Attachment.reparent(parent: parent2);
child4Attachment.reparent(parent: parent2);
child1.requestFocus();
await tester.pump();
expect(scope1.focusedChild, equals(child1));
expect(parent2.children.contains(child1), isFalse);
child1Attachment.reparent(parent: parent2);
await tester.pump();
expect(scope1.focusedChild, isNull);
expect(parent2.children.contains(child1), isTrue);
});
testWidgets('ancestors and descendants are computed and recomputed properly', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope1 = FocusScopeNode(debugLabel: 'scope1');
final FocusAttachment scope1Attachment = scope1.attach(context);
final FocusScopeNode scope2 = FocusScopeNode(debugLabel: 'scope2');
final FocusAttachment scope2Attachment = scope2.attach(context);
final FocusNode parent1 = FocusNode(debugLabel: 'parent1');
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode(debugLabel: 'parent2');
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'child1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(debugLabel: 'child2');
final FocusAttachment child2Attachment = child2.attach(context);
final FocusNode child3 = FocusNode(debugLabel: 'child3');
final FocusAttachment child3Attachment = child3.attach(context);
final FocusNode child4 = FocusNode(debugLabel: 'child4');
final FocusAttachment child4Attachment = child4.attach(context);
scope1Attachment.reparent(parent: tester.binding.focusManager.rootScope);
scope2Attachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope1);
parent2Attachment.reparent(parent: scope2);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
child3Attachment.reparent(parent: parent2);
child4Attachment.reparent(parent: parent2);
child4.requestFocus();
await tester.pump();
expect(child4.ancestors, equals(<FocusNode>[parent2, scope2, tester.binding.focusManager.rootScope]));
expect(tester.binding.focusManager.rootScope.descendants, equals(<FocusNode>[child1, child2, parent1, scope1, child3, child4, parent2, scope2]));
scope2Attachment.reparent(parent: child2);
await tester.pump();
expect(child4.ancestors, equals(<FocusNode>[parent2, scope2, child2, parent1, scope1, tester.binding.focusManager.rootScope]));
expect(tester.binding.focusManager.rootScope.descendants, equals(<FocusNode>[child1, child3, child4, parent2, scope2, child2, parent1, scope1]));
});
testWidgets('Can move focus between scopes and keep focus', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope1 = FocusScopeNode();
final FocusAttachment scope1Attachment = scope1.attach(context);
final FocusScopeNode scope2 = FocusScopeNode();
final FocusAttachment scope2Attachment = scope2.attach(context);
final FocusNode parent1 = FocusNode();
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode();
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode();
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode();
final FocusAttachment child2Attachment = child2.attach(context);
final FocusNode child3 = FocusNode();
final FocusAttachment child3Attachment = child3.attach(context);
final FocusNode child4 = FocusNode();
final FocusAttachment child4Attachment = child4.attach(context);
scope1Attachment.reparent(parent: tester.binding.focusManager.rootScope);
scope2Attachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope1);
parent2Attachment.reparent(parent: scope2);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
child3Attachment.reparent(parent: parent2);
child4Attachment.reparent(parent: parent2);
child4.requestFocus();
await tester.pump();
child1.requestFocus();
await tester.pump();
expect(child4.hasFocus, isFalse);
expect(child4.hasPrimaryFocus, isFalse);
expect(child1.hasFocus, isTrue);
expect(child1.hasPrimaryFocus, isTrue);
expect(scope1.hasFocus, isTrue);
expect(scope1.hasPrimaryFocus, isFalse);
expect(scope2.hasFocus, isFalse);
expect(scope2.hasPrimaryFocus, isFalse);
expect(parent1.hasFocus, isTrue);
expect(parent2.hasFocus, isFalse);
expect(scope1.focusedChild, equals(child1));
expect(scope2.focusedChild, equals(child4));
scope2.requestFocus();
await tester.pump();
expect(child4.hasFocus, isTrue);
expect(child4.hasPrimaryFocus, isTrue);
expect(child1.hasFocus, isFalse);
expect(child1.hasPrimaryFocus, isFalse);
expect(scope1.hasFocus, isFalse);
expect(scope1.hasPrimaryFocus, isFalse);
expect(scope2.hasFocus, isTrue);
expect(scope2.hasPrimaryFocus, isFalse);
expect(parent1.hasFocus, isFalse);
expect(parent2.hasFocus, isTrue);
expect(scope1.focusedChild, equals(child1));
expect(scope2.focusedChild, equals(child4));
});
testWidgets('Unfocus works properly', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope1 = FocusScopeNode(debugLabel: 'scope1')..attach(context);
final FocusAttachment scope1Attachment = scope1.attach(context);
final FocusScopeNode scope2 = FocusScopeNode(debugLabel: 'scope2');
final FocusAttachment scope2Attachment = scope2.attach(context);
final FocusNode parent1 = FocusNode(debugLabel: 'parent1');
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode(debugLabel: 'parent2');
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'child1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(debugLabel: 'child2');
final FocusAttachment child2Attachment = child2.attach(context);
final FocusNode child3 = FocusNode(debugLabel: 'child3');
final FocusAttachment child3Attachment = child3.attach(context);
final FocusNode child4 = FocusNode(debugLabel: 'child4');
final FocusAttachment child4Attachment = child4.attach(context);
scope1Attachment.reparent(parent: tester.binding.focusManager.rootScope);
scope2Attachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope1);
parent2Attachment.reparent(parent: scope2);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
child3Attachment.reparent(parent: parent2);
child4Attachment.reparent(parent: parent2);
child1.requestFocus();
await tester.pump();
expect(scope1.focusedChild, equals(child1));
expect(parent2.children.contains(child1), isFalse);
child1.unfocus();
await tester.pump();
expect(scope1.focusedChild, isNull);
expect(child1.hasPrimaryFocus, isFalse);
expect(scope1.hasFocus, isFalse);
child1.requestFocus();
await tester.pump();
expect(scope1.focusedChild, equals(child1));
expect(parent2.children.contains(child1), isFalse);
scope1.unfocus();
await tester.pump();
expect(scope1.focusedChild, isNull);
expect(child1.hasPrimaryFocus, isFalse);
expect(scope1.hasFocus, isFalse);
});
testWidgets('Key handling bubbles up and terminates when handled.', (WidgetTester tester) async {
final Set<FocusNode> receivedAnEvent = <FocusNode>{};
final Set<FocusNode> shouldHandle = <FocusNode>{};
bool handleEvent(FocusNode node, RawKeyEvent event) {
if (shouldHandle.contains(node)) {
receivedAnEvent.add(node);
return true;
}
return false;
}
Future<void> sendEvent() async {
receivedAnEvent.clear();
await tester.sendKeyEvent(LogicalKeyboardKey.metaLeft, platform: 'fuchsia');
}
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope1 = FocusScopeNode(debugLabel: 'Scope 1');
final FocusAttachment scope1Attachment = scope1.attach(context, onKey: handleEvent);
final FocusScopeNode scope2 = FocusScopeNode(debugLabel: 'Scope 2');
final FocusAttachment scope2Attachment = scope2.attach(context, onKey: handleEvent);
final FocusNode parent1 = FocusNode(debugLabel: 'Parent 1', onKey: handleEvent);
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode(debugLabel: 'Parent 2', onKey: handleEvent);
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'Child 1');
final FocusAttachment child1Attachment = child1.attach(context, onKey: handleEvent);
final FocusNode child2 = FocusNode(debugLabel: 'Child 2');
final FocusAttachment child2Attachment = child2.attach(context, onKey: handleEvent);
final FocusNode child3 = FocusNode(debugLabel: 'Child 3');
final FocusAttachment child3Attachment = child3.attach(context, onKey: handleEvent);
final FocusNode child4 = FocusNode(debugLabel: 'Child 4');
final FocusAttachment child4Attachment = child4.attach(context, onKey: handleEvent);
scope1Attachment.reparent(parent: tester.binding.focusManager.rootScope);
scope2Attachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope1);
parent2Attachment.reparent(parent: scope2);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
child3Attachment.reparent(parent: parent2);
child4Attachment.reparent(parent: parent2);
child4.requestFocus();
await tester.pump();
shouldHandle.addAll(<FocusNode>{scope2, parent2, child2, child4});
await sendEvent();
expect(receivedAnEvent, equals(<FocusNode>{child4}));
shouldHandle.remove(child4);
await sendEvent();
expect(receivedAnEvent, equals(<FocusNode>{parent2}));
shouldHandle.remove(parent2);
await sendEvent();
expect(receivedAnEvent, equals(<FocusNode>{scope2}));
shouldHandle.clear();
await sendEvent();
expect(receivedAnEvent, isEmpty);
child1.requestFocus();
await tester.pump();
shouldHandle.addAll(<FocusNode>{scope2, parent2, child2, child4});
await sendEvent();
// Since none of the focused nodes handle this event, nothing should
// receive it.
expect(receivedAnEvent, isEmpty);
});
testWidgets('Events change focus highlight mode.', (WidgetTester tester) async {
await setupWidget(tester);
int callCount = 0;
FocusHighlightMode lastMode;
void handleModeChange(FocusHighlightMode mode) {
lastMode = mode;
callCount++;
}
FocusManager.instance.addHighlightModeListener(handleModeChange);
addTearDown(() => FocusManager.instance.removeHighlightModeListener(handleModeChange));
expect(callCount, equals(0));
expect(lastMode, isNull);
FocusManager.instance.highlightStrategy = FocusHighlightStrategy.automatic;
expect(FocusManager.instance.highlightMode, equals(FocusHighlightMode.touch));
await tester.sendKeyEvent(LogicalKeyboardKey.metaLeft, platform: 'fuchsia');
expect(callCount, equals(1));
expect(lastMode, FocusHighlightMode.traditional);
expect(FocusManager.instance.highlightMode, equals(FocusHighlightMode.traditional));
await tester.tap(find.byType(Container));
expect(callCount, equals(2));
expect(lastMode, FocusHighlightMode.touch);
expect(FocusManager.instance.highlightMode, equals(FocusHighlightMode.touch));
final TestGesture gesture = await tester.startGesture(Offset.zero, kind: PointerDeviceKind.mouse);
addTearDown(gesture.removePointer);
await gesture.up();
expect(callCount, equals(3));
expect(lastMode, FocusHighlightMode.traditional);
expect(FocusManager.instance.highlightMode, equals(FocusHighlightMode.traditional));
await tester.tap(find.byType(Container));
expect(callCount, equals(4));
expect(lastMode, FocusHighlightMode.touch);
expect(FocusManager.instance.highlightMode, equals(FocusHighlightMode.touch));
FocusManager.instance.highlightStrategy = FocusHighlightStrategy.alwaysTraditional;
expect(callCount, equals(5));
expect(lastMode, FocusHighlightMode.traditional);
expect(FocusManager.instance.highlightMode, equals(FocusHighlightMode.traditional));
FocusManager.instance.highlightStrategy = FocusHighlightStrategy.alwaysTouch;
expect(callCount, equals(6));
expect(lastMode, FocusHighlightMode.touch);
expect(FocusManager.instance.highlightMode, equals(FocusHighlightMode.touch));
});
testWidgets('implements debugFillProperties', (WidgetTester tester) async {
final DiagnosticPropertiesBuilder builder = DiagnosticPropertiesBuilder();
FocusScopeNode(
debugLabel: 'Scope Label',
).debugFillProperties(builder);
final List<String> description = builder.properties.map((DiagnosticsNode n) => n.toString()).toList();
expect(description, <String>[
'context: null',
'canRequestFocus: true',
'hasFocus: false',
'hasPrimaryFocus: false'
]);
});
testWidgets('debugDescribeFocusTree produces correct output', (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode scope1 = FocusScopeNode(debugLabel: 'Scope 1');
final FocusAttachment scope1Attachment = scope1.attach(context);
final FocusScopeNode scope2 = FocusScopeNode(); // No label, Just to test that it works.
final FocusAttachment scope2Attachment = scope2.attach(context);
final FocusNode parent1 = FocusNode(debugLabel: 'Parent 1');
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusNode parent2 = FocusNode(debugLabel: 'Parent 2');
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'Child 1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(); // No label, Just to test that it works.
final FocusAttachment child2Attachment = child2.attach(context);
final FocusNode child3 = FocusNode(debugLabel: 'Child 3');
final FocusAttachment child3Attachment = child3.attach(context);
final FocusNode child4 = FocusNode(debugLabel: 'Child 4');
final FocusAttachment child4Attachment = child4.attach(context);
scope1Attachment.reparent(parent: tester.binding.focusManager.rootScope);
scope2Attachment.reparent(parent: tester.binding.focusManager.rootScope);
parent1Attachment.reparent(parent: scope1);
parent2Attachment.reparent(parent: scope2);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: parent1);
child3Attachment.reparent(parent: parent2);
child4Attachment.reparent(parent: parent2);
child4.requestFocus();
await tester.pump();
final String description = debugDescribeFocusTree();
expect(
description,
equalsIgnoringHashCodes(
'FocusManager#00000\n'
' │ primaryFocus: FocusNode#00000(Child 4)\n'
' │ primaryFocusCreator: Container-[GlobalKey#00000] ← [root]\n'
' │\n'
' └─rootScope: FocusScopeNode#00000(Root Focus Scope)\n'
' │ IN FOCUS PATH\n'
' │ focusedChildren: FocusScopeNode#00000\n'
' │\n'
' ├─Child 1: FocusScopeNode#00000(Scope 1)\n'
' │ │ context: Container-[GlobalKey#00000]\n'
' │ │\n'
' │ └─Child 1: FocusNode#00000(Parent 1)\n'
' │ │ context: Container-[GlobalKey#00000]\n'
' │ │\n'
' │ ├─Child 1: FocusNode#00000(Child 1)\n'
' │ │ context: Container-[GlobalKey#00000]\n'
' │ │\n'
' │ └─Child 2: FocusNode#00000\n'
' │ context: Container-[GlobalKey#00000]\n'
' │\n'
' └─Child 2: FocusScopeNode#00000\n'
' │ context: Container-[GlobalKey#00000]\n'
' │ IN FOCUS PATH\n'
' │ focusedChildren: FocusNode#00000(Child 4)\n'
' │\n'
' └─Child 1: FocusNode#00000(Parent 2)\n'
' │ context: Container-[GlobalKey#00000]\n'
' │ IN FOCUS PATH\n'
' │\n'
' ├─Child 1: FocusNode#00000(Child 3)\n'
' │ context: Container-[GlobalKey#00000]\n'
' │\n'
' └─Child 2: FocusNode#00000(Child 4)\n'
' context: Container-[GlobalKey#00000]\n'
' PRIMARY FOCUS\n'
));
});
});
testWidgets("Doesn't lose focused child when reparenting if the nearestScope doesn't change.", (WidgetTester tester) async {
final BuildContext context = await setupWidget(tester);
final FocusScopeNode parent1 = FocusScopeNode(debugLabel: 'parent1');
final FocusScopeNode parent2 = FocusScopeNode(debugLabel: 'parent2');
final FocusAttachment parent1Attachment = parent1.attach(context);
final FocusAttachment parent2Attachment = parent2.attach(context);
final FocusNode child1 = FocusNode(debugLabel: 'child1');
final FocusAttachment child1Attachment = child1.attach(context);
final FocusNode child2 = FocusNode(debugLabel: 'child2');
final FocusAttachment child2Attachment = child2.attach(context);
parent1Attachment.reparent(parent: tester.binding.focusManager.rootScope);
child1Attachment.reparent(parent: parent1);
child2Attachment.reparent(parent: child1);
parent1.autofocus(child2);
await tester.pump();
parent2Attachment.reparent(parent: tester.binding.focusManager.rootScope);
parent2.requestFocus();
await tester.pump();
expect(parent1.focusedChild, equals(child2));
child2Attachment.reparent(parent: parent1);
expect(parent1.focusedChild, equals(child2));
parent1.requestFocus();
await tester.pump();
expect(parent1.focusedChild, equals(child2));
});
}