Testing via simpletest

functions_test.php

<?php
require_once 'simpletest/autorun.php';

function add($a, $b){
    return $a + $b;
}

function sayHi($name){
    return "Hello $name";
}

function wrapTextInHtmlH1($txt){
    $uppercase = ucwords($txt);
    return "<h1>$uppercase</h1>";
}

class TestFunction extends UnitTestCase{

    function testAddTwoNumbers(){
        $this->assertEqual(add(5, 5), '10');
    }

    function testSayHiToTheWorld(){
        $this->assertEqual(sayHi('Ahmad'), 'Hello Ahmad');
    }

    function testWrapTextInHtmlH1(){
        $this->assertEqual(wrapTextInHtmlH1('title of this article'), '<h1>Title Of This Article</h1>');
    }

    function testNameIsNull(){
        $name = NULL;
        $this->assertNull($name);
//        $this->assertNotNull($name);
    }

    function testFail(){
        $this->fail('Do this later');
    }
}
?>