sample is simple test with php4

simpletest_calc

<?php
require_once('simpletest/autorun.php');
require_once('Calc.php');

class TestOfCalc extends UnitTestCase {
    function testCalcAdd() {
        $calc = new Calc();

        // 1 + 1 = 2
        $this->assertEqual($calc->add(1,1), 2); 

        // -1 + 1 = 0
        $this->assertEqual($calc->add(-1,1), 0); 
    
        // 0 + 0 = 0 
        $this->assertEqual($calc->add(0,0), 0); 

        // -1 + -1 = -2 
        $this->assertEqual($calc->add(-1,-1), -2);
    
        // 数字以外はエラーを出力
        $this->expectError();
        $calc->add('a', 1); 
    
        $this->expectError();
        $calc->add('', 1); 
    
    }   
}

/**
 * Calc Class
 * varsion PHP4
 */
class Calc{

    function add($a, $b) {
        if (!is_int($a) || !is_int($b)) {
            trigger_error('argument is invalid');
        }   
        return $a + $b; 
    }   
}

?>