PHPUnit Automated Unit Testing Framework

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

PHPUnitAutomated Unit

Testing Framework

June 5, 2008

“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



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


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 partsof an application

(Functions, Classes, Macros)


The xUnit frameworks provide away to automate unit tests

If you automate your tests,the quality of your tests

is consistent


Make it easy to test,and you'll do it more often.

If you use version control,test before every check-in


You can wrap a set of testsinto a test suite

A suite tests larger units ofyour application, even the

application itself


PHP itself is tested usingautomated tests

They use a framework called phpt

The PHPUnit Pocket Guide

Tells you everything youneed to know when

writing PHPUnit test cases

Buy the book, or read theHTML version at:

http://www.phpunit.de/pocket_guide/index.en.php



Let's look at a test case!


<?phprequire_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)); }}?>


Tests should be run against aknown, fixed statecalled a fixture

setUp() creates this state

tearDown() destroys the stateand puts things back the way

they were


Test cases are implementedas functions whose namesstart with the word “test”

This example has:testNewArrayIsEmpty()

testArrayContainsAnElement()


Run a PHPUnit test casewith the phpunit command

phpunit UnitTest UnitTest.phptells PHPUnit to look for a

class UnitTestin the UnitTest.php file

(filename is optional)


phpunit ArrayTestPHPUnit 3.3.0 by Sebastian Bergmann.

..

Time: 0 seconds

OK (2 tests)


Can output test logs toa variety of formats:

GraphVizJSONTAPXML


Test suite+

Exported results

allows forContinuous Integration


Continuous integrationis a way to automatically

run your test suiteregularly

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

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