--- /dev/null
+<?php
+
+namespace Drupal\Tests\system\Functional\Datetime;
+
+use Drupal\Core\Datetime\DrupalDateTime;
+use Drupal\Tests\BrowserTestBase;
+use Drupal\user\Entity\User;
+
+/**
+ * Tests DrupalDateTime functionality.
+ *
+ * @group Datetime
+ */
+class DrupalDateTimeTest extends BrowserTestBase {
+
+ /**
+ * Set up required modules.
+ */
+ public static $modules = [];
+
+ /**
+ * Test setup.
+ */
+ protected function setUp() {
+ parent::setUp();
+
+ }
+
+ /**
+ * Test that the AJAX Timezone Callback can deal with various formats.
+ */
+ public function testSystemTimezone() {
+ $options = [
+ 'query' => [
+ 'date' => 'Tue+Sep+17+2013+21%3A35%3A31+GMT%2B0100+(BST)#',
+ ]
+ ];
+ // Query the AJAX Timezone Callback with a long-format date.
+ $response = $this->drupalGet('system/timezone/BST/3600/1', $options);
+ $this->assertEqual($response, '"Europe\/London"', 'Timezone AJAX callback successfully identifies and responds to a long-format date.');
+ }
+
+ /**
+ * Test that DrupalDateTime can detect the right timezone to use.
+ * Test with a variety of less commonly used timezone names to
+ * help ensure that the system timezone will be different than the
+ * stated timezones.
+ */
+ public function testDateTimezone() {
+ $date_string = '2007-01-31 21:00:00';
+
+ // Make sure no site timezone has been set.
+ $this->config('system.date')
+ ->set('timezone.user.configurable', 0)
+ ->set('timezone.default', NULL)
+ ->save();
+
+ // Detect the system timezone.
+ $system_timezone = date_default_timezone_get();
+
+ // Create a date object with an unspecified timezone, which should
+ // end up using the system timezone.
+ $date = new DrupalDateTime($date_string);
+ $timezone = $date->getTimezone()->getName();
+ $this->assertTrue($timezone == $system_timezone, 'DrupalDateTime uses the system timezone when there is no site timezone.');
+
+ // Create a date object with a specified timezone.
+ $date = new DrupalDateTime($date_string, 'America/Yellowknife');
+ $timezone = $date->getTimezone()->getName();
+ $this->assertTrue($timezone == 'America/Yellowknife', 'DrupalDateTime uses the specified timezone if provided.');
+
+ // Set a site timezone.
+ $this->config('system.date')->set('timezone.default', 'Europe/Warsaw')->save();
+
+ // Create a date object with an unspecified timezone, which should
+ // end up using the site timezone.
+ $date = new DrupalDateTime($date_string);
+ $timezone = $date->getTimezone()->getName();
+ $this->assertTrue($timezone == 'Europe/Warsaw', 'DrupalDateTime uses the site timezone if provided.');
+
+ // Create user.
+ $this->config('system.date')->set('timezone.user.configurable', 1)->save();
+ $test_user = $this->drupalCreateUser([]);
+ $this->drupalLogin($test_user);
+
+ // Set up the user with a different timezone than the site.
+ $edit = ['mail' => $test_user->getEmail(), 'timezone' => 'Asia/Manila'];
+ $this->drupalPostForm('user/' . $test_user->id() . '/edit', $edit, t('Save'));
+
+ // Reload the user and reset the timezone in AccountProxy::setAccount().
+ \Drupal::entityManager()->getStorage('user')->resetCache();
+ $this->container->get('current_user')->setAccount(User::load($test_user->id()));
+
+ // Create a date object with an unspecified timezone, which should
+ // end up using the user timezone.
+ $date = new DrupalDateTime($date_string);
+ $timezone = $date->getTimezone()->getName();
+ $this->assertTrue($timezone == 'Asia/Manila', 'DrupalDateTime uses the user timezone, if configurable timezones are used and it is set.');
+ }
+
+ /**
+ * Tests the ability to override the time zone in the format method.
+ */
+ public function testTimezoneFormat() {
+ // Create a date in UTC
+ $date = DrupalDateTime::createFromTimestamp(87654321, 'UTC');
+
+ // Verify that the date format method displays the default time zone.
+ $this->assertEqual($date->format('Y/m/d H:i:s e'), '1972/10/11 12:25:21 UTC', 'Date has default UTC time zone and correct date/time.');
+
+ // Verify that the format method can override the time zone.
+ $this->assertEqual($date->format('Y/m/d H:i:s e', ['timezone' => 'America/New_York']), '1972/10/11 08:25:21 America/New_York', 'Date displayed overidden time zone and correct date/time');
+
+ // Verify that the date format method still displays the default time zone
+ // for the date object.
+ $this->assertEqual($date->format('Y/m/d H:i:s e'), '1972/10/11 12:25:21 UTC', 'Date still has default UTC time zone and correct date/time');
+ }
+
+}