DateHelperTest.php

<?php

namespace Drupal\Tests\Core\Datetime;

use Drupal\Core\Datetime\DateHelper;
use Drupal\Core\DependencyInjection\ContainerBuilder;
use Drupal\Tests\UnitTestCase;

/**
 * @coversDefaultClass \Drupal\Core\Datetime\DateHelper
 * @group Datetime
 */
class DateHelperTest extends UnitTestCase {
    
    /**
     * @covers ::weekDaysOrdered
     * @dataProvider providerTestWeekDaysOrdered
     */
    public function testWeekDaysOrdered($first_day, $expected) {
        $container = new ContainerBuilder();
        $config = [
            'system.date' => [
                'first_day' => $first_day,
            ],
        ];
        $container->set('config.factory', $this->getConfigFactoryStub($config));
        \Drupal::setContainer($container);
        $weekdays = DateHelper::weekDaysUntranslated();
        // self::assertSame() MUST be used here as it checks for array key order.
        $this->assertSame($expected, DateHelper::weekDaysOrdered($weekdays));
    }
    public function providerTestWeekDaysOrdered() {
        $data = [];
        $data[] = [
            0,
            [
                0 => 'Sunday',
                1 => 'Monday',
                2 => 'Tuesday',
                3 => 'Wednesday',
                4 => 'Thursday',
                5 => 'Friday',
                6 => 'Saturday',
            ],
        ];
        $data[] = [
            1,
            [
                1 => 'Monday',
                2 => 'Tuesday',
                3 => 'Wednesday',
                4 => 'Thursday',
                5 => 'Friday',
                6 => 'Saturday',
                0 => 'Sunday',
            ],
        ];
        $data[] = [
            2,
            [
                2 => 'Tuesday',
                3 => 'Wednesday',
                4 => 'Thursday',
                5 => 'Friday',
                6 => 'Saturday',
                0 => 'Sunday',
                1 => 'Monday',
            ],
        ];
        $data[] = [
            3,
            [
                3 => 'Wednesday',
                4 => 'Thursday',
                5 => 'Friday',
                6 => 'Saturday',
                0 => 'Sunday',
                1 => 'Monday',
                2 => 'Tuesday',
            ],
        ];
        $data[] = [
            4,
            [
                4 => 'Thursday',
                5 => 'Friday',
                6 => 'Saturday',
                0 => 'Sunday',
                1 => 'Monday',
                2 => 'Tuesday',
                3 => 'Wednesday',
            ],
        ];
        $data[] = [
            5,
            [
                5 => 'Friday',
                6 => 'Saturday',
                0 => 'Sunday',
                1 => 'Monday',
                2 => 'Tuesday',
                3 => 'Wednesday',
                4 => 'Thursday',
            ],
        ];
        $data[] = [
            6,
            [
                6 => 'Saturday',
                0 => 'Sunday',
                1 => 'Monday',
                2 => 'Tuesday',
                3 => 'Wednesday',
                4 => 'Thursday',
                5 => 'Friday',
            ],
        ];
        $data[] = [
            7,
            [
                0 => 'Sunday',
                1 => 'Monday',
                2 => 'Tuesday',
                3 => 'Wednesday',
                4 => 'Thursday',
                5 => 'Friday',
                6 => 'Saturday',
            ],
        ];
        return $data;
    }

}