PHPUnit your bug exterminator

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Software should be perfect, but it isn't! Bugs in the software ranges from small "inoffensive ones" to the ones that makes the news when a bunch of credit card data is stole.

On this talk we will review different testing methodologies and tools, and we will focus on using PHPUnit to assert how your software works and how to exterminate your bugs.

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PHPUnit your bug exterminator

  1. 1. RICARDO MELO PHPUnit your bug exterminator Follow this topic: @rjsmelo, #phpunit PHPLX – 07 December 2013
  2. 2. RICARDO MELO CTO @ DRI ● PHP, Mysql, Linux and lots of other OSS ● ZCE, RHCE, LPI 3, ITIL, etc ● +10 years building (and breaking) things ● @rjsmelo 2
  3. 3. About 14 Year old academic spin-off ● Pragmatic OSS Orientation ● PHP, Mysql, SugarCRM, Drupal, JavaScript, Linux, etc. ● Crafters, Integrators ● ● Always looking for software developers – Yes, right now! @rjsmelo 3
  4. 4. Outline Testing Methodologies ● Testing Tools Ecosystem ● What's PHPUnit ● The "Hello World" test ● How to run your tests ● Other assertions ● Other PHPUnit topics ● The bug hunting work flow ● 1999 - 2013 DRI. Some Rights Reserved . 4
  5. 5. Testing and Development Methodologies Unit, Integration, System and Acceptance Testing ● CMMI/Waterfall, Agile and XP ● TDD and BDD ● 1999 - 2013 DRI. Some Rights Reserved . 5
  6. 6. Testing Tools Ecosystem PHPUnit ● Behat ● Selenium ● Codeception ● And many more ● 1999 - 2013 DRI. Some Rights Reserved . 6
  7. 7. What's PHPUnit xUnit family for PHP ● Uses assertions to check the behavior of the unit ● But it can handle other tests like integration and system ● 1999 - 2013 DRI. Some Rights Reserved . 7
  8. 8. Installing PHPUnit ● Pear pear config-set auto_discover 1 pear install pear.phpunit.de/PHPUnit phpunit --version 1999 - 2013 DRI. Some Rights Reserved . 8
  9. 9. Installing PHPUnit ● Composer { "require-dev": { "phpunit/phpunit": "3.7.*" } } composer install ./vendor/bin/phpunit --version 1999 - 2013 DRI. Some Rights Reserved . 9
  10. 10. The "Hello World" test <?php namespace Phplx; class HelloWorld { public function say(){ return "Hello World"; } } 1999 - 2013 DRI. Some Rights Reserved . 10
  11. 11. The "Hello World" test <?php namespace PhplxTestsHelloWorld; use PHPUnit_Framework_TestCase use PhplxHelloWorld; class HelloWorldTest extends PHPUnit_Framework_TestCase { public function testHelloWorld(){ $obj = new HelloWorld(); $this->assertEquals("Hello World", $obj->say()); } } 1999 - 2013 DRI. Some Rights Reserved . 11
  12. 12. How to run your tests # using PEAR / PHAR phpunit --bootstrap vendor/autoload.php tests/ # using composer ./vendor/bin/phpunit tests/ 1999 - 2013 DRI. Some Rights Reserved . 12
  13. 13. How to run your tests – bootstrap.php <?php use PhplxApp; require_once dirname(__DIR__) . "/vendor/autoload.php"; $app = new App(); $app->initHelloWorldApplication(); 1999 - 2013 DRI. Some Rights Reserved . 13
  14. 14. How to run your tests – phpunit.xml <phpunit xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/3.7/phpunit.xs d" bootstrap="tests/bootstrap.php" stopOnError="false" stopOnFailure="false" stopOnIncomplete="false" stopOnSkipped="false" > <testsuites> <testsuite name="Hello World Test Suite"> <directory suffix="Test.php">tests</directory> </testsuite> </testsuites> </phpunit> 1999 - 2013 DRI. Some Rights Reserved . 14
  15. 15. How to run your tests – phpunit $ ./vendor/bin/phpunit PHPUnit 3.7.28 by Sebastian Bergmann. Configuration read from /home/rjsmelo/phplx/phpunit.xml ... Time: 42 ms, Memory: 3.25Mb OK (3 tests, 3 assertions) 1999 - 2013 DRI. Some Rights Reserved . 15
  16. 16. Other assertions ● There is a HUGE list of assertions 1999 - 2013 DRI. Some Rights Reserved . 16
  17. 17. Use specific assertions - assertInstanceOf <?php use PhplxHelloWorld; class InstanceOfTest extends PHPUnit_Framework_TestCase { public function testTrue(){ $obj = new stdClass(); $this->assertTrue( $obj instanceof PhplxHelloWorld); } public function testInstanceOf(){ $obj = new stdClass(); $this->assertInstanceOf( 'PhplxHelloWorld', $obj); } } 1999 - 2013 DRI. Some Rights Reserved . 17
  18. 18. Use specific assertions - assertInstanceOf PHPUnit 3.7.28 by Sebastian Bergmann. [...] 1) InstanceOfTest::testTrue Failed asserting that false is true. 2) InstanceOfTest::testInstanceOf Failed asserting that stdClass Object () is an instance of class "PhplxHelloWorld". 1999 - 2013 DRI. Some Rights Reserved . 18
  19. 19. Use specific assertions - JsonString <?php use PhplxObject; class JsonStringTest extends PHPUnit_Framework_TestCase { protected $jsonString = '{"someKey":"some thing","otherKey":"other thing"}'; public function testEquals(){ $obj = new Object(); $this->assertEquals( $this->jsonString, $obj->myPreciousJson()); } public function testJsonString(){ $obj = new Object(); $this->assertJsonStringEqualsJsonString( $this->jsonString, $obj->myPreciousJson()); } } 1999 - 2013 DRI. Some Rights Reserved . 19
  20. 20. Use specific assertions - JsonString PHPUnit 3.7.28 by Sebastian Bergmann. [...] 1) JsonStringTest::testEquals Failed asserting that two strings are equal. --- Expected +++ Actual @@ @@ -'{"someKey":"some thing","otherKey":"other thing"}' +'{"someKey":"some value","otherKey":"other thing"}' 2) JsonStringTest::testJsonString Failed asserting that two objects are equal. --- Expected +++ Actual @@ @@ stdClass Object ( 'someKey' => 'some thing' + 'someKey' => 'some value' 'otherKey' => 'other thing' ) 1999 - 2013 DRI. Some Rights Reserved . 20
  21. 21. Other PHPUnit topics Setup / Teardown ● Data providers ● Test doubles ● 1999 - 2013 DRI. Some Rights Reserved . 21
  22. 22. The bug hunting work flow Gather information on the problem ● Reproduce the problem ● Capture that as a test ● Fix it (ok... this sometimes is hard) ● All green... mission accomplished ● 1999 - 2013 DRI. Some Rights Reserved . 22
  23. 23. The community challenge Go to your favorite PHP project ● Or go to https://github.com/trending?l=php and pick one ● Fix Some Bugs! ● 1999 - 2013 DRI. Some Rights Reserved . 23
  24. 24. Thank you
  25. 25. QA Follow this topic: @rjsmelo, #phpunit Code: https://github.com/rjsmelo/talk-phpunit Feedback: https://joind.in/talk/view/10305
  26. 26. www.dri-global.com @rjsmelo ricardo.melo@dri-global.com

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