class DrupalDateTimeTest

class DrupalDateTimeTest extends BrowserTestBase {
    
    /**
     * Set up required modules.
     */
    protected static $modules = [];
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * Test setup.
     */
    protected function setUp() : void {
        parent::setUp();
    }
    
    /**
     * Tests 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();
        $this->assertSame($system_timezone, $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->assertSame('America/Yellowknife', $timezone, '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->assertSame('Europe/Warsaw', $timezone, '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->drupalGet('user/' . $test_user->id() . '/edit');
        $this->submitForm($edit, 'Save');
        // Reload the user and reset the timezone in AccountProxy::setAccount().
        \Drupal::entityTypeManager()->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->assertSame('Asia/Manila', $timezone, '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->assertEquals('1972/10/11 12:25:21 UTC', $date->format('Y/m/d H:i:s e'), 'Date has default UTC time zone and correct date/time.');
        // Verify that the format method can override the time zone.
        $this->assertEquals('1972/10/11 08:25:21 America/New_York', $date->format('Y/m/d H:i:s e', [
            'timezone' => 'America/New_York',
        ]), 'Date displayed overridden time zone and correct date/time');
        // Verify that the date format method still displays the default time zone
        // for the date object.
        $this->assertEquals('1972/10/11 12:25:21 UTC', $date->format('Y/m/d H:i:s e'), 'Date still has default UTC time zone and correct date/time');
    }

}