Test time zones and DST handling.
function testTimeZoneHandling() {
// Setup date/time settings for Honolulu time.
$config = config('system.timezone')
->set('default', 'Pacific/Honolulu')
->set('user.configurable', 0)
->save();
config('system.date')
->set('formats.medium.pattern.php', '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';
$node1 = $this
->drupalCreateNode(array(
'created' => strtotime($date1),
'type' => 'article',
));
$node2 = $this
->drupalCreateNode(array(
'created' => strtotime($date2),
'type' => 'article',
));
// Confirm date format and time zone.
$this
->drupalGet("node/{$node1->nid}");
$this
->assertText('2007-01-31 21:00:00 -1000', 'Date should be identical, with GMT offset of -10 hours.');
$this
->drupalGet("node/{$node2->nid}");
$this
->assertText('2007-07-31 21:00:00 -1000', 'Date should be identical, with GMT offset of -10 hours.');
// Set time zone to Los Angeles time.
$config
->set('default', 'America/Los_Angeles')
->save();
// Confirm date format and time zone.
$this
->drupalGet("node/{$node1->nid}");
$this
->assertText('2007-01-31 23:00:00 -0800', 'Date should be two hours ahead, with GMT offset of -8 hours.');
$this
->drupalGet("node/{$node2->nid}");
$this
->assertText('2007-08-01 00:00:00 -0700', 'Date should be three hours ahead, with GMT offset of -7 hours.');
}