class UserTimeZoneTest

class UserTimeZoneTest extends BrowserTestBase {
  
  /**
   * Modules to enable.
   *
   * @var array
   */
  protected static $modules = [
    'node',
    'system_test',
  ];
  
  /**
   * {@inheritdoc}
   */
  protected $defaultTheme = 'stark';
  
  /**
   * Tests the display of dates and time when user-configurable time zones are set.
   */
  public function testUserTimeZone() {
    // Setup date/time settings for Los Angeles time.
    $this->config('system.date')
      ->set('timezone.user.configurable', 1)
      ->set('timezone.default', 'America/Los_Angeles')
      ->save();
    // Load the 'medium' date format, which is the default for node creation
    // time, and override it. Since we are testing time zones with Daylight
    // Saving Time, and need to future proof against changes to the zoneinfo
    // database, we choose the 'I' format placeholder instead of a
    // human-readable zone name. With 'I', a 1 means the date is in DST, and 0
    // if not.
    DateFormat::load('medium')->setPattern('Y-m-d H:i I')
      ->save();
    // Create a user account and login.
    $web_user = $this->drupalCreateUser();
    $this->drupalLogin($web_user);
    // Create some nodes with different authored-on dates.
    // Two dates in PST (winter time):
    $date1 = '2007-03-09 21:00:00 -0800';
    $date2 = '2007-03-11 01:00:00 -0800';
    // One date in PDT (summer time):
    $date3 = '2007-03-20 21:00:00 -0700';
    $this->drupalCreateContentType([
      'type' => 'article',
    ]);
    $node1 = $this->drupalCreateNode([
      'created' => strtotime($date1),
      'type' => 'article',
    ]);
    $node2 = $this->drupalCreateNode([
      'created' => strtotime($date2),
      'type' => 'article',
    ]);
    $node3 = $this->drupalCreateNode([
      'created' => strtotime($date3),
      'type' => 'article',
    ]);
    // Confirm date format and time zone.
    $this->drupalGet('node/' . $node1->id());
    // Date should be PST.
    $this->assertSession()
      ->pageTextContains('2007-03-09 21:00 0');
    $this->drupalGet('node/' . $node2->id());
    // Date should be PST.
    $this->assertSession()
      ->pageTextContains('2007-03-11 01:00 0');
    $this->drupalGet('node/' . $node3->id());
    // Date should be PST.
    $this->assertSession()
      ->pageTextContains('2007-03-20 21:00 1');
    // Change user time zone to Santiago time.
    $edit = [];
    $edit['mail'] = $web_user->getEmail();
    $edit['timezone'] = 'America/Santiago';
    $this->drupalGet("user/" . $web_user->id() . "/edit");
    $this->submitForm($edit, 'Save');
    $this->assertSession()
      ->pageTextContains('The changes have been saved.');
    // Confirm date format and time zone.
    $this->drupalGet('node/' . $node1->id());
    // Date should be Chile summer time, five hours ahead of PST.
    $this->assertSession()
      ->pageTextContains('2007-03-10 02:00 1');
    $this->drupalGet('node/' . $node2->id());
    // Date should be Chile time, four hours ahead of PST.
    $this->assertSession()
      ->pageTextContains('2007-03-11 05:00 0');
    $this->drupalGet('node/' . $node3->id());
    // Date should be Chile time, three hours ahead of PDT.
    $this->assertSession()
      ->pageTextContains('2007-03-21 00:00 0');
    // Ensure that anonymous users also use the default timezone.
    $this->drupalLogout();
    $this->drupalGet('node/' . $node1->id());
    // Date should be PST.
    $this->assertSession()
      ->pageTextContains('2007-03-09 21:00 0');
    $this->drupalGet('node/' . $node2->id());
    // Date should be PST.
    $this->assertSession()
      ->pageTextContains('2007-03-11 01:00 0');
    $this->drupalGet('node/' . $node3->id());
    // Date should be PDT.
    $this->assertSession()
      ->pageTextContains('2007-03-20 21:00 1');
    // Format a date without accessing the current user at all and
    // ensure that it uses the default timezone.
    $this->drupalGet('/system-test/date');
    // Date should be PST.
    $this->assertSession()
      ->pageTextContains('2016-01-13 08:29 0');
  }

}