function test_updatePatronId()
{
//Arrange
// Make a Patron
$name = "Dan Brown";
$phone = "3";
$email = "*****@*****.**";
$test_patron = new Patron($name, $phone, $email);
$test_patron->save();
// Make a Checkout and save
$patron_id = $test_patron->getId();
$copy_id = 1;
$due_date = "2015-08-09";
$test_checkout = new Checkout($patron_id, $copy_id, $due_date);
$test_checkout->save();
//Make a second Patron
$name2 = "Vaughn Brown";
$phone2 = "4";
$email2 = "*****@*****.**";
$test_patron2 = new Patron($name2, $phone2, $email2);
$test_patron2->save();
$new_patron_id = $test_patron2->getId();
//Act
$test_checkout->updatePatronId($new_patron_id);
//Assert
$result = $test_checkout->getPatronId();
$this->assertEquals($new_patron_id, $result);
}