public function RollingIntervalTest::test2WeekIntervalSpanningDSTChange in Recurring Time Period 8

Tests a 2 week interval spanning a daylight saving change.

File

tests/src/Kernel/RollingIntervalTest.php, line 119

Class

RollingIntervalTest

Tests the rolling interval plugin.

Namespace

Drupal\Tests\recurring_period\Kernel

Code

public function test2WeekIntervalSpanningDSTChange() {
  $timezone_london = new \DateTimeZone('Europe/London');

  /** @var RecurringPeriodInterface $plugin */
  $plugin = $this->recurringPeriodManager
    ->createInstance('rolling_interval', [
    'interval' => [
      'period' => 'week',
      'interval' => 2,
    ],
  ]);
  $start_date = new \DateTimeImmutable('2017-10-17T09:00:00', $timezone_london);
  $expected_end_date = new \DateTimeImmutable('2017-10-31T09:00:00', $timezone_london);
  $actual_end_date = $plugin
    ->calculateDate($start_date);
  $this
    ->assertEquals($expected_end_date, $actual_end_date);

  // The timestamp difference should take into account the extra hour
  // because of the the switch from DST.
  $expected_timestamp_diff = 14 * 86400 + 3600;
  $actual_timestamp_diff = (int) $actual_end_date
    ->format('U') - (int) $start_date
    ->format('U');
  $this
    ->assertEquals($expected_timestamp_diff, $actual_timestamp_diff);
}