PHPUnit Automated Unit Testing Framework

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org PHPUnit Automated Unit Testing Framework June 5, 2008

Dave Ross “ I grew up around computers, fell in love with the Internet way back in 1994, and built a successful career around my interests in computers and business. My career focus has been on e-commerce, and in my personal time I study issues related to digital identity, trust, and reputation tracking. I’m also an small business owner, an avid Scrabble player, and a b-movie junkie.” 9 years professional development experience PHP developer, certified Java developer LinkedIn profile: http://www.linkedin.com/pub/2/832/9b0 Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org

The West Suburban Chicago PHP Meetup

Meets first Thursday of every month

Usually at the Panera in Wheaton

Official Meetup page:

http://php.meetup.com/381

Blog:

http://suburbanchicagophp.org

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org

PHPUnit is a member of the xUnit family of testing frameworks (SUnit, jUnit, pyUnit...)

Written for PHP 5.x, older versions supported PHP 4.x

Unit testing:

Testing the smallest testable parts

of an application

(Functions, Classes, Macros)

The xUnit frameworks provide a

way to automate unit tests

If you automate your tests,

the quality of your tests

is consistent

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org Make it easy to test, and you'll do it more often. If you use version control, test before every check-in

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org You can wrap a set of tests into a test suite A suite tests larger units of your application, even the application itself

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org PHP itself is tested using automated tests They use a framework called phpt

The PHPUnit Pocket Guide Tells you everything you need to know when writing PHPUnit test cases Buy the book, or read the HTML version at: http://www.phpunit.de/pocket_guide/index.en.php Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org Let's look at a test case!

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org <?php require_once 'PHPUnit/Framework.php'; class ArrayTest extends PHPUnit_Framework_TestCase { protected $fixture; protected function setUp() { // Create the Array fixture. $this->fixture = array(); } public function testNewArrayIsEmpty() { // Assert that the size of the Array fixture is 0. $this->assertEquals(0, sizeof($this->fixture)); } public function testArrayContainsAnElement() { // Add an element to the Array fixture. $this->fixture[] = 'Element'; // Assert that the size of the Array fixture is 1. $this->assertEquals(1, sizeof($this->fixture)); } } ?>

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org Tests should be run against a known, fixed state called a fixture setUp() creates this state tearDown() destroys the state and puts things back the way they were

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org Test cases are implemented as functions whose names start with the word “ test ” This example has: testNewArrayIsEmpty() testArrayContainsAnElement()

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org Run a PHPUnit test case with the phpunit command phpunit UnitTest UnitTest.php tells PHPUnit to look for a class UnitTest in the UnitTest.php file (filename is optional)

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org phpunit ArrayTest PHPUnit 3.3.0 by Sebastian Bergmann. .. Time: 0 seconds OK (2 tests)

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org Can output test logs to a variety of formats : GraphViz JSON TAP XML

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org Test suite + Exported results allows for Continuous Integration

Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org Continuous integration is a way to automatically run your test suite regularly Once a day... Once an hour... Every time someone checks in code...

Official PHPUnit page: http://www.phpunit.de/ PHPUnit Pocket Guide: http://www.phpunit.de/pocket_guide Effective Unit Testing: http://www.acm.org/ubiquity/views/t_burns_1.html For More Information Dave Ross | West Suburban Chicago PHP Meetup | suburbanchicagophp.org