1<?php 2class Calculator 3{ 4 /** 5 * @assert (0, 0) == 0 6 * @assert (0, 1) == 1 7 * @assert (1, 0) == 1 8 * @assert (1, 1) == 2 9 */ 10 public function add($a, $b) 11 { 12 return $a + $b; 13 } 14} 15