function DateTimeTest::testTimeZoneHandling

Tests time zones and DST handling.

File

core/modules/system/tests/src/Functional/System/DateTimeTest.php, line 60

Class

DateTimeTest

Test date formatting and time zone handling, including daylight saving time.

Namespace

Code

public function testTimeZoneHandling() : void {
  // Setup date/time settings for Honolulu time.
  $config = $this->config('system.date')
    ->set('timezone.default', 'Pacific/Honolulu')
    ->set('timezone.user.configurable', 0)
    ->save();
  DateFormat::load('medium')->setPattern('Y-m-d H:i:s O')
    ->save();
  // Create some nodes with different authored-on dates.
  $date1 = '2007-01-31 21:00:00 -1000';
  $date2 = '2007-07-31 21:00:00 -1000';
  $this->drupalCreateContentType([
    'type' => 'article',
  ]);
  $node1 = $this->drupalCreateNode([
    'created' => strtotime($date1),
    'type' => 'article',
  ]);
  $node2 = $this->drupalCreateNode([
    'created' => strtotime($date2),
    'type' => 'article',
  ]);
  // Confirm date format and time zone.
  $this->drupalGet('node/' . $node1->id());
  // Date should be identical, with GMT offset of -10 hours.
  $this->assertSession()
    ->pageTextContains('2007-01-31 21:00:00 -1000');
  $this->drupalGet('node/' . $node2->id());
  // Date should be identical, with GMT offset of -10 hours.
  $this->assertSession()
    ->pageTextContains('2007-07-31 21:00:00 -1000');
  // Set time zone to Los Angeles time.
  $config->set('timezone.default', 'America/Los_Angeles')
    ->save();
  \Drupal::entityTypeManager()->getViewBuilder('node')
    ->resetCache([
    $node1,
    $node2,
  ]);
  // Confirm date format and time zone.
  $this->drupalGet('node/' . $node1->id());
  // Date should be two hours ahead, with GMT offset of -8 hours.
  $this->assertSession()
    ->pageTextContains('2007-01-31 23:00:00 -0800');
  $this->drupalGet('node/' . $node2->id());
  // Date should be three hours ahead, with GMT offset of -7 hours.
  $this->assertSession()
    ->pageTextContains('2007-08-01 00:00:00 -0700');
}