Sebastian Bergmann. Has instrumentally contributed to tranforming PHP into a reliable platform for large-scale, critical projects.

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1 Testing is h ard... rd The Wrong End of the Stick Sebastian Bergmann June

2 Sebastian Bergmann» Has instrumentally contributed to tranforming PHP into a reliable platform for large-scale, critical projects.» Enterprises and PHP developers around the world benefit from the tools that he has developed and the experience he shares.

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4 Wrong end of the stick?

5 To turn an ability into a disability, a solution into a problem. Urban Dictionary

6 [PHPUnit is] very powerful and very complete from what I can tell, but I think it s difficult to pick up and [...] that difficulty makes people less likely to use it. Ed Finkler

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11 Top Beginner's Problems Installation

12 Top Beginner's Problems Installation Solved by PHAR and Composer support

13 wget chmod +x phpunit.phar./phpunit.phar --version PHPUnit by Sebastian Bergmann.

14 Top Beginner's Problems Overwhelmed by nomenclature

15 st on al te fun cti edge-toedge acceptance test end-to-en d test unit test test system tes t integration test

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17 Top Beginner's Problems Overwhelmed by features

18 Top Beginner's Problems Overwhelmed by features But you only need to learn a few to start

19 class Money { private $amount; //... public function getamount() { return $this->amount; public function negate() { return new Money(-1 * $this->amount); //...

20 class MoneyTest extends PHPUnit_Framework_TestCase { //... public function testcanbenegated() { //...

21 class MoneyTest extends PHPUnit_Framework_TestCase { //... public function testcanbenegated() { // Arrange $a = new Money(1); //...

22 class MoneyTest extends PHPUnit_Framework_TestCase { //... public function testcanbenegated() { // Arrange $a = new Money(1); // Act $b = $a->negate(); //...

23 class MoneyTest extends PHPUnit_Framework_TestCase { //... public function testcanbenegated() { // Arrange $a = new Money(1); // Act $b = $a->negate(); // Assert $this->assertequals(-1, $b->getamount()); //...

24 phpunit --bootstrap src/autoload.php tests PHPUnit by Sebastian Bergmann.... Time: 0 seconds, Memory: 3.75Mb OK (11 tests, 21 assertions)

25 Top Beginner's Problems Hard-to-Test Code

26 Top Beginner's Problems Hard-to-Test Code

27 <?php class SomeController { public function performsomeaction() { global $userid; $db = new PDO(DSN); $stmt = $db->prepare( 'SELECT * FROM users WHERE id=:user;' ); $stmt->bindvalue(':user', $userid, PDO::PARAM_INT); $stmt->execute(); $record = $stmt->fetch(pdo::fetch_assoc); //... print 'something';

28 <?php class SomeController { public function performsomeaction() { global $userid; $db = new PDO(DSN); $stmt = $db->prepare( 'SELECT * FROM users WHERE id=:user;' ); $stmt->bindvalue(':user', $userid, PDO::PARAM_INT); $stmt->execute(); $record = $stmt->fetch(pdo::fetch_assoc); //... print 'something';

29 <?php class SomeController { public function performsomeaction() { global $userid; $db = new PDO(DSN); $stmt = $db->prepare( 'SELECT * FROM users WHERE id=:user;' ); $stmt->bindvalue(':user', $userid, PDO::PARAM_INT); $stmt->execute(); $record = $stmt->fetch(pdo::fetch_assoc); //... print 'something';

30 <?php class SomeController { public function performsomeaction() { global $userid; $db = new PDO(DSN); $stmt = $db->prepare( 'SELECT * FROM users WHERE id=:user;' ); $stmt->bindvalue(':user', $userid, PDO::PARAM_INT); $stmt->execute(); $record = $stmt->fetch(pdo::fetch_assoc); //... print 'something';

31 <?php class SomeController { public function performsomeaction() { global $userid; $db = new PDO(DSN); $stmt = $db->prepare( 'SELECT * FROM users WHERE id=:user;' ); $stmt->bindvalue(':user', $userid, PDO::PARAM_INT); $stmt->execute(); $record = $stmt->fetch(pdo::fetch_assoc); //... print 'something';

32 <?php class SomeController { public function performsomeaction() { global $userid; $db = new PDO(DSN); $stmt = $db->prepare( 'SELECT * FROM users WHERE id=:user;' ); $stmt->bindvalue(':user', $userid, PDO::PARAM_INT); $stmt->execute(); $record = $stmt->fetch(pdo::fetch_assoc); //... print 'something';

33 <?php class SomeControllerTest extends PHPUnit_Framework_TestCase { protected function setup() { $GLOBALS['userId'] = 1; define('dsn', 'sqlite:/tmp/test.db'); $db = new PDO(DSN); $db->exec(file_get_contents( DIR. '/fixture/schema.sql'));

34 <?php class SomeControllerTest extends PHPUnit_Framework_TestCase { protected function setup() { $GLOBALS['userId'] = 1; define('dsn', 'sqlite:/tmp/test.db'); $db = new PDO(DSN); $db->exec(file_get_contents( DIR. '/fixture/schema.sql')); protected function teardown() { unset($globals['userid']); runkit_constant_remove('dsn'); unlink('/tmp/test.db');

35 <?php class SomeControllerTest extends PHPUnit_Framework_TestCase { protected function setup() { $GLOBALS['userId'] = 1; define('dsn', 'sqlite:/tmp/test.db'); $db = new PDO(DSN); $db->exec(file_get_contents( DIR. '/fixture/schema.sql')); protected function teardown() { unset($globals['userid']); runkit_constant_remove('dsn'); unlink('/tmp/test.db'); public function testactionisperformedcorrectly() { $this->expectoutputstring('something'); $controller = new SomeController; $controller->performsomeaction();

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37 You only need to know a little PHPUnit to test clean code.

38 If you need to employ tricks to test your code this usually indicates that the code is hard to test.

39 The secret in testing is in writing testable code Miško Hevery

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