public function test_expire_at()
{
$t = new Ticket();
$d = $t->expire_at;
$this->assertInstanceOf('ICanBoogie\\DateTime', $d);
$this->assertTrue($d->is_empty);
$this->assertEquals('UTC', $d->zone->name);
$this->assertEquals('0000-00-00 00:00:00', $d->as_db);
$t->expire_at = '2013-03-07 18:30:45';
$d = $t->expire_at;
$this->assertInstanceOf('ICanBoogie\\DateTime', $d);
$this->assertFalse($d->is_empty);
$this->assertEquals('UTC', $d->zone->name);
$this->assertEquals('2013-03-07 18:30:45', $d->as_db);
$t->expire_at = new DateTime('2013-03-07 18:30:45', 'utc');
$d = $t->expire_at;
$this->assertInstanceOf('ICanBoogie\\DateTime', $d);
$this->assertFalse($d->is_empty);
$this->assertEquals('UTC', $d->zone->name);
$this->assertEquals('2013-03-07 18:30:45', $d->as_db);
$t->expire_at = null;
$this->assertInstanceOf('ICanBoogie\\DateTime', $d);
$t->expire_at = DateTime::now();
$properties = $t->__sleep();
$this->assertArrayHasKey('expire_at', $properties);
$array = $t->to_array();
$this->assertArrayHasKey('expire_at', $array);
}
