Sample PHP class and PHPUnit test using a dataProvider.

phpunit-example

<?php
class StringUtil
{
    public function is_palindrome($str)
    {
        if (!is_string($str)) {
            return false;
        }

        $length = strlen($str);
        for ($i = 0; $i < (int)($length / 2); $i++) {
            if ($str[$i] != $str[$length-$i-1]) {
                return false;
            }
        }

        return true;
    }
}


<?php
require_once 'PHPUnit/Framework.php';

require_once 'StringUtil.php';

class StringUtilTest extends PHPUnit_Framework_TestCase
{
    protected $object;

    protected function setUp()
    {
        $this->object = new StringUtil();
    }

    /**
     * @dataProvider is_palindrome_data_provider
     */
    public function test_is_palindrome($string, $is_palindrome)
    {
        $this->assertEquals($is_palindrome, $this->object->is_palindrome($string));
    }

    public static function is_palindrome_data_provider()
    {
        return array(
            array('bob', true),
            array('racecar', true),
            array('hannah', true),
            array('abc', false),
            array('a', true),
            array('milk', false),
            array('anna', true),
        );
    }
}