function testUpdateUnit()
{
$name = "John Doe";
$password = "******";
$email = "*****@*****.**";
$signed_in = 0;
$test_user = new User($name, $password, $email, $signed_in);
$test_user->save();
$course_title = "Literature";
$subject = "English";
$course_description = "Deconstructing English literature.";
$user_id = $test_user->getId();
$test_course = new Course($course_title, $subject, $course_description, $user_id);
$test_course->save();
$unit_title = "Into the Wild";
$unit_description = "The life and death of Chris McCandless.";
$course_id = $test_course->getId();
$test_unit = new Unit($unit_title, $unit_description, $course_id);
$test_unit->save();
$unit_title2 = "The Catcher in the Rye";
$unit_description2 = "Foul-mouthed kid is angsty.";
$test_unit->updateUnit($unit_title2, $unit_description2);
$result = Unit::getAll();
$this->assertEquals($test_unit, $result[0]);
}
