function testDeleteOne()
{
$user_name = "Wolf";
$user_buy_quantity = 5;
$user_phone = '1234567890';
$user_email = "*****@*****.**";
$activity_id = 100;
$id = 1;
$test_user = new User($user_name, $user_buy_quantity, $user_phone, $user_email, $activity_id, $id);
$test_user->save();
$user_name2 = "WolfMan";
$id2 = 2;
$test_user2 = new User($user_name2, $user_buy_quantity, $user_phone, $user_email, $activity_id, $id2);
$test_user2->save();
$test_user->deleteOne();
$result = User::getAll();
$this->assertEquals($test_user2, $result[0]);
}
