packages/flutter/test/cupertino/date_picker_test.dart

// Copyright 2017 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/cupertino.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  group('Countdown timer picker', () {
    testWidgets('onTimerDurationChanged is not null', (WidgetTester tester) async {
      expect(
        () {
          CupertinoTimerPicker(onTimerDurationChanged: null);
        },
        throwsAssertionError,
      );
    });

    testWidgets('initialTimerDuration falls within limit', (WidgetTester tester) async {
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            initialTimerDuration: const Duration(days: 1),
          );
        },
        throwsAssertionError,
      );

      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            initialTimerDuration: const Duration(seconds: -1),
          );
        },
        throwsAssertionError,
      );
    });

    testWidgets('minuteInterval is positive and is a factor of 60', (WidgetTester tester) async {
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            minuteInterval: 0,
          );
        },
        throwsAssertionError,
      );
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            minuteInterval: -1,
          );
        },
        throwsAssertionError,
      );
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            minuteInterval: 7,
          );
        },
        throwsAssertionError,
      );
    });

    testWidgets('secondInterval is positive and is a factor of 60', (WidgetTester tester) async {
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            secondInterval: 0,
          );
        },
        throwsAssertionError,
      );
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            secondInterval: -1,
          );
        },
        throwsAssertionError,
      );
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            secondInterval: 7,
          );
        },
        throwsAssertionError,
      );
    });

    testWidgets('secondInterval is positive and is a factor of 60', (WidgetTester tester) async {
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            secondInterval: 0,
          );
        },
        throwsAssertionError,
      );
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            secondInterval: -1,
          );
        },
        throwsAssertionError,
      );
      expect(
        () {
          CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            secondInterval: 7,
          );
        },
        throwsAssertionError,
      );
    });

    testWidgets('columns are ordered correctly when text direction is ltr', (WidgetTester tester) async {
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.ltr,
          child: CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            initialTimerDuration: const Duration(hours: 12, minutes: 30, seconds: 59),
          ),
        ),
      );

      Offset lastOffset = tester.getTopLeft(find.text('12'));

      expect(tester.getTopLeft(find.text('hours')).dx > lastOffset.dx, true);
      lastOffset = tester.getTopLeft(find.text('hours'));

      expect(tester.getTopLeft(find.text('30')).dx > lastOffset.dx, true);
      lastOffset = tester.getTopLeft(find.text('30'));

      expect(tester.getTopLeft(find.text('min')).dx > lastOffset.dx, true);
      lastOffset = tester.getTopLeft(find.text('min'));

      expect(tester.getTopLeft(find.text('59')).dx > lastOffset.dx, true);
      lastOffset = tester.getTopLeft(find.text('59'));

      expect(tester.getTopLeft(find.text('sec')).dx > lastOffset.dx, true);
    });

    testWidgets('columns are ordered correctly when text direction is rtl', (WidgetTester tester) async {
      await tester.pumpWidget(
        Directionality(
          textDirection: TextDirection.rtl,
          child: CupertinoTimerPicker(
            onTimerDurationChanged: (_) {},
            initialTimerDuration: const Duration(hours: 12, minutes: 30, seconds: 59),
          ),
        ),
      );

      Offset lastOffset = tester.getTopLeft(find.text('12'));

      expect(tester.getTopLeft(find.text('hours')).dx > lastOffset.dx, false);
      lastOffset = tester.getTopLeft(find.text('hours'));

      expect(tester.getTopLeft(find.text('30')).dx > lastOffset.dx, false);
      lastOffset = tester.getTopLeft(find.text('30'));

      expect(tester.getTopLeft(find.text('min')).dx > lastOffset.dx, false);
      lastOffset = tester.getTopLeft(find.text('min'));

      expect(tester.getTopLeft(find.text('59')).dx > lastOffset.dx, false);
      lastOffset = tester.getTopLeft(find.text('59'));

      expect(tester.getTopLeft(find.text('sec')).dx > lastOffset.dx, false);
    });

    testWidgets('width of picker is consistent', (WidgetTester tester) async {
      await tester.pumpWidget(
        SizedBox(
          height: 400.0,
          width: 400.0,
          child: Directionality(
            textDirection: TextDirection.ltr,
            child: CupertinoTimerPicker(
              onTimerDurationChanged: (_) {},
              initialTimerDuration: const Duration(hours: 12, minutes: 30, seconds: 59),
            ),
          ),
        ),
      );

      // Distance between the first column and the last column.
      final double distance =
        tester.getCenter(find.text('sec')).dx - tester.getCenter(find.text('12')).dx;

      await tester.pumpWidget(
        SizedBox(
          height: 400.0,
          width: 800.0,
          child: Directionality(
            textDirection: TextDirection.ltr,
            child: CupertinoTimerPicker(
              onTimerDurationChanged: (_) {},
              initialTimerDuration: const Duration(hours: 12, minutes: 30, seconds: 59),
            ),
          ),
        ),
      );

      // Distance between the first and the last column should be the same.
      expect(
        tester.getCenter(find.text('sec')).dx - tester.getCenter(find.text('12')).dx,
        distance,
      );
    });
  });
}