examples/api/test/material/text_form_field/text_form_field.1_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/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_api_samples/material/text_form_field/text_form_field.1.dart' as example;
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('Pressing space should focus the next field', (WidgetTester tester) async {
    await tester.pumpWidget(const example.TextFormFieldExampleApp());
    final Finder textFormField = find.byType(TextFormField);

    expect(textFormField, findsExactly(5));

    final Finder editableText = find.byType(EditableText);
    expect(editableText, findsExactly(5));

    List<bool> getFocuses() {
      return editableText.evaluate()
        .map((Element finderResult) => (finderResult.widget as EditableText).focusNode.hasFocus)
        .toList();
    }

    expect(getFocuses(), const <bool>[false, false, false, false, false]);

    await tester.tap(textFormField.first);
    await tester.pump();

    expect(getFocuses(), const <bool>[true, false, false, false, false]);

    await tester.sendKeyEvent(LogicalKeyboardKey.space);
    await tester.pump();

    expect(getFocuses(), const <bool>[false, true, false, false, false]);

    await tester.sendKeyEvent(LogicalKeyboardKey.space);
    await tester.pump();

    expect(getFocuses(), const <bool>[false, false, true, false, false]);

    await tester.sendKeyEvent(LogicalKeyboardKey.space);
    await tester.pump();

    expect(getFocuses(), const <bool>[false, false, false, true, false]);

    await tester.sendKeyEvent(LogicalKeyboardKey.space);
    await tester.pump();

    expect(getFocuses(), const <bool>[false, false, false, false, true]);

    await tester.sendKeyEvent(LogicalKeyboardKey.space);
    await tester.pump();

    expect(getFocuses(), const <bool>[true, false, false, false, false]);
  });
}