Creating a PHPUnit test case
<?php
    class EmailAddressTest extends PHPUnit_TestCase{
        
        function EmailAddressTest($name) {
            PHPUnit_TestCase::PHPUnit_TestCase($name);
        }
    
            
        function testLocalPart() {
            $email = new EmailAddress("john@php.net");
            
            // check that the local part of the address 
            // is equal to 'john'
            $this->assertTrue($email->localPart == 'john');
        }
 
        function testDomain() {
            
            $email = new EmailAddress("john@php.net");
            $this->assertTrue($email->domain == 'php.net');
        }
    }
?>