<?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;
  }

}