packages/flutter/test/widgets/keyboard_listener_test.dart

// 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/services.dart';
import 'package:flutter/widgets.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('Can dispose without keyboard', (WidgetTester tester) async {
    final FocusNode focusNode = FocusNode();
    await tester.pumpWidget(KeyboardListener(focusNode: focusNode, child: Container()));
    await tester.pumpWidget(KeyboardListener(focusNode: focusNode, child: Container()));
    await tester.pumpWidget(Container());
  });

  testWidgets('Fuchsia key event', (WidgetTester tester) async {
    final List<KeyEvent> events = <KeyEvent>[];

    final FocusNode focusNode = FocusNode();

    await tester.pumpWidget(
      KeyboardListener(
        focusNode: focusNode,
        onKeyEvent: events.add,
        child: Container(),
      ),
    );

    focusNode.requestFocus();
    await tester.idle();

    await tester.sendKeyEvent(LogicalKeyboardKey.metaLeft, platform: 'fuchsia');
    await tester.idle();

    expect(events.length, 2);
    expect(events[0], isA<KeyDownEvent>());
    expect(events[0].physicalKey, PhysicalKeyboardKey.metaLeft);
    expect(events[0].logicalKey, LogicalKeyboardKey.metaLeft);

    await tester.pumpWidget(Container());
    focusNode.dispose();
  }, skip: isBrowser); // [intended] This is a Fuchsia-specific test.

  testWidgets('Web key event', (WidgetTester tester) async {
    final List<KeyEvent> events = <KeyEvent>[];

    final FocusNode focusNode = FocusNode();

    await tester.pumpWidget(
      KeyboardListener(
        focusNode: focusNode,
        onKeyEvent: events.add,
        child: Container(),
      ),
    );

    focusNode.requestFocus();
    await tester.idle();

    await tester.sendKeyEvent(LogicalKeyboardKey.metaLeft);
    await tester.idle();

    expect(events.length, 2);
    expect(events[0], isA<KeyDownEvent>());
    expect(events[0].physicalKey, PhysicalKeyboardKey.metaLeft);
    expect(events[0].logicalKey, LogicalKeyboardKey.metaLeft);

    await tester.pumpWidget(Container());
    focusNode.dispose();
  });

  testWidgets('Defunct listeners do not receive events', (WidgetTester tester) async {
    final List<KeyEvent> events = <KeyEvent>[];

    final FocusNode focusNode = FocusNode();

    await tester.pumpWidget(
      KeyboardListener(
        focusNode: focusNode,
        onKeyEvent: events.add,
        child: Container(),
      ),
    );

    focusNode.requestFocus();
    await tester.idle();

    await tester.sendKeyEvent(LogicalKeyboardKey.metaLeft, platform: 'fuchsia');
    await tester.idle();

    expect(events.length, 2);
    events.clear();

    await tester.pumpWidget(Container());

    await tester.sendKeyEvent(LogicalKeyboardKey.metaLeft, platform: 'fuchsia');

    await tester.idle();

    expect(events.length, 0);

    await tester.pumpWidget(Container());
    focusNode.dispose();
  });
}