examples/api/test/material/date_picker/date_picker_theme_day_shape.0_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_api_samples/material/date_picker/date_picker_theme_day_shape.0.dart' as example;
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets('DatePickerThemeData.dayShape updates day selection shape decoration', (WidgetTester tester) async {
    final ThemeData theme = ThemeData();
    final OutlinedBorder dayShape = RoundedRectangleBorder(borderRadius: BorderRadius.circular(8.0));
    const Color todayBackgroundColor = Colors.amber;
    const Color todayForegroundColor = Colors.black;
    const BorderSide todayBorder = BorderSide(width: 2);

    await tester.pumpWidget(
      const example.DatePickerApp(),
    );

    await tester.tap(find.text('Open Date Picker'));
    await tester.pumpAndSettle();

    ShapeDecoration dayShapeDecoration = tester.widget<DecoratedBox>(find.ancestor(
      of: find.text('15'),
      matching: find.byType(DecoratedBox),
    )).decoration as ShapeDecoration;

    // Test the current day shape decoration.
    expect(dayShapeDecoration.color, todayBackgroundColor);
    expect(dayShapeDecoration.shape, dayShape.copyWith(side: todayBorder.copyWith(color: todayForegroundColor)));

    dayShapeDecoration = tester.widget<DecoratedBox>(find.ancestor(
      of: find.text('20'),
      matching: find.byType(DecoratedBox),
    )).decoration as ShapeDecoration;

    // Test the selected day shape decoration.
    expect(dayShapeDecoration.color, theme.colorScheme.primary);
    expect(dayShapeDecoration.shape, dayShape);

    // Tap to select current day as the selected day.
    await tester.tap(find.text('15'));
    await tester.pumpAndSettle();

    dayShapeDecoration = tester.widget<DecoratedBox>(find.ancestor(
      of: find.text('15'),
      matching: find.byType(DecoratedBox),
    )).decoration as ShapeDecoration;

    // Test the selected day shape decoration.
    expect(dayShapeDecoration.color, todayBackgroundColor);
    expect(dayShapeDecoration.shape, dayShape.copyWith(side: todayBorder.copyWith(color: todayForegroundColor)));
  });
}