public function testOwnerChangeChangesModifiedDateTime()
 {
     Yii::app()->user->userModel = User::getByUsername('super');
     $user = UserTestHelper::createBasicUser('basic');
     $testItem = new OwnedSecurableTestItem();
     $testItem->member = 'test';
     $this->assertTrue($testItem->save());
     $defaultDateTimeModified = $testItem->modifiedDateTime;
     sleep(1);
     $testItem->owner = $user;
     $this->assertTrue($testItem->save());
     $testItemId = $testItem->id;
     $testItem->forget();
     $testItem = OwnedSecurableTestItem::getById($testItemId);
     $this->assertNotEquals($defaultDateTimeModified, $testItem->modifiedDateTime);
 }