public function Test_of_getHigherItem()
{
$TodoItems = new TodoItem();
$this->assertFalse($TodoItems->list->getHigherItem());
$TodoItem = $TodoItems->find(10);
$HigherItem = $TodoItem->list->getHigherItem();
$this->assertEqual($HigherItem->task, 'Task number 9');
$TodoItem = $TodoItems->find(1);
$this->assertFalse($TodoItem->list->getHigherItem());
$TodoItems = new TodoItem();
$TodoItems->transactionStart();
$this->assertTrue($TodoItems->deleteAll());
$this->assertFalse($TodoItems->list->getHigherItem());
$TodoItems->transactionFail();
$TodoItems->transactionComplete();
}