Introduction into unit testing

Transcript

1. phpunit How not to get roundkicked by Chuck Norris woensdag 25 april 12
2. Unit testing •wat is unit testen? •phpunit? •code coverage? woensdag 25 april 12
3. testcase (1) <?php class fooTest extends PHPUnit_Framework_TestCase { public function testBlahBlah() { $foo = new Foo(); $this->assertEquals($foo->baz(), 1); } } <?php class foo { public function baz() { return 1; } } FooTest.php: Foo.php woensdag 25 april 12
4. testcase (2) include_once "foo.php"; class fooTest extends PHPUnit_Framework_TestCase { public function testBlahBlah() { $foo = new Foo(); $this->assertEquals($foo->baz(), 1); } } <?php class foo { public function baz() { return 1; } } FooTest.php: Foo.php woensdag 25 april 12
5. testcase (3) woensdag 25 april 12
6. testcase (4) <?php class foo { public function baz() { return 1; } public function isOdd($number) { if (($number & 1) == 1) { return true; } else { return false; } } } FooTest.php: Foo.php <?php include_once "foo.php"; class fooTest extends PHPUnit_Framework_TestCase { public function testBlahBlah() { $foo = new Foo(); $this->assertEquals($foo->baz(), 1); } public function testIsOdd() { $foo = new Foo(); $this->assertTrue($foo->isOdd(1)); } } woensdag 25 april 12
7. testcase (5) woensdag 25 april 12
8. testcase (6) woensdag 25 april 12
9. testcase (7) FooTest.php: <?php include_once "foo.php"; class fooTest extends PHPUnit_Framework_TestCase { public function testBlahBlah() { $foo = new Foo(); $this->assertEquals($foo->baz(), 1); } public function testIsOdd() { $foo = new Foo(); $this->assertTrue($foo->isOdd(1)); } public function testDoesIsOddReturnFalseWhenAnEvenDigitIsGiven { $foo = new Foo(); $this->assertFalse($foo->isOdd(2)); } } woensdag 25 april 12
10. testcase (8) woensdag 25 april 12
11. PHPUnit chapters •setUp(), tearDown() •@depends •@dataproviders •@exception testing •mocking & stubbing woensdag 25 april 12
12. setUp(), tearDown() (1) <?php class fooTest extends PHPUnit_Framework_TestCase { public function testBlahBlah() { $foo = new Bar(); .... } public function testBlah() { $foo = new Bar(); .... } } woensdag 25 april 12
13. setUp(), tearDown() (2) <?php class fooTest extends PHPUnit_Framework_TestCase { public setUp() { $this->_foo = new Bar(); } public tearDown() { unset($this->_foo); } public function testBlahBlah() { .... } public function testBlah() { .... } } woensdag 25 april 12
14. @depends (1) <?php class fooTest extends PHPUnit_Framework_TestCase { public function testFoo() { .... } /** * @depends testFoo */ public function testBar() { .... } } woensdag 25 april 12
15. @dataprovider (1) <?php class fooTest extends PHPUnit_Framework_TestCase { public function testCount() { $foo = new Foo(); $this->assertEquals($foo->add(1, 2), 3); $this->assertEquals($foo->add(10,-4), 6); $this->assertEquals($foo->add(4, 6), 10); ... } } woensdag 25 april 12
16. @dataprovider (2) <?php class fooTest extends PHPUnit_Framework_TestCase { /** * @dataprovider countProvider */ public function testCount($a, $b, $c) { $foo = new Foo(); $this->assertEquals($foo->add($a, $b), $c); } public function countProvider() { return array( array(1, 2, 3), array(10, -4, 6), array(4, 6, 10) ); } } woensdag 25 april 12
17. @expectedException (1) <?php class fooTest extends PHPUnit_Framework_TestCase { public function testCount() { $foo = new Foo(); try { $foo->functionWithException(); $this->fail(“An exception should have occurred”); } catch (Exception $e) { } } } woensdag 25 april 12
18. @expectedException (2) <?php class fooTest extends PHPUnit_Framework_TestCase { /** * @expectedException Exception */ public function testCount() { $foo = new Foo(); $foo->functionWithException(); } } woensdag 25 april 12
19. Mocking & Stubbing (1) <?php class MyMailer { protected $_from; protected $_body; protected $_subject; function setFrom($from) { $this->_from = $from; } ....... function mail(array $to) { $count = 0; foreach ($to as $recipient) { if ($this->_mail($recipient)) $count++; } return $count; } protected function _mail($to) { return mail($to, $this->_subject, $this->_body); } } Isolated woensdag 25 april 12
20. Mocking & Stubbing (2) <?php include_once "mail.php"; class Mock_MyMailer extends MyMailer { protected function _mail($to) { return true; } } class mailTest extends PHPUnit_Framework_TestCase { ... public function testMail() { $mailer = new Mock_MyMailer(); $mailer->setSubject("blaat"); $mailer->setFrom("jthijssen@example.com"); $mailer->setBody("meeh"); $to = array("aap@example.com", "blaat@example.com", "all@example.com"); $this->assertEquals($mailer->mail($to), 3); } } woensdag 25 april 12
21. Mocking & Stubbing (3) <?php include_once "mail.php"; class mailTest extends PHPUnit_Framework_TestCase { ... public function testMail() { $mailer = new MyMailer(); $mailer->setSubject("blaat"); $mailer->setFrom("jthijssen@example.com"); $mailer->setBody("meeh"); $to = array("aap@example.com", "blaat@example.com", "all@example.com"); $this->assertEquals($mailer->mail($to), 3); } } woensdag 25 april 12
22. Mocking & Stubbing (4) <?php class mailTest extends PHPUnit_Framework_TestCase { public function testMail() { $stub = $this->getMockBuilder('MyMailer', array('_mail'))->getMock(); $stub->expects($this->any()) ->method('_mail') ->will($this->returnValue(true)); $stub->setSubject("blaat"); $stub->setFrom("jthijssen@example.com"); $stub->setBody("meeh"); $to = array("aap@example.com", "blaat@example.com", "all@example.com"); $this->assertEquals($stub->mail($to), 3); } } woensdag 25 april 12
23. Difficult cases (1) public function getItem($id) { $client = new Zend_Http_Client(); $client->setUri(‘http://my.api’); $client->setParameterPost(‘ID’,$id); $client->setMethod(Zend-Http_Client::POST); $request = $client->request(); $item = $request->getBody(); $item = strtolower($item); return $item; } ∂ TESTABLE? woensdag 25 april 12
24. Difficult cases (2) public function __construct() { $this->_adapter = new Zend_Http_Client_Adapter_Socket(); } public function getItem($id) { $client = new Zend_Http_Client(); $client->setConfig(array(‘adapter’ => $this->getAdapter())); $client->setUri(‘http://my.api’); $client->setParameterPost(‘ID’,$id); $client->setMethod(Zend-Http_Client::POST); $request = $client->request(); $item = $request->getBody(); $item = strtolower($item); return $item; } ∂ “DECOUPLE” ADAPTER woensdag 25 april 12
25. Difficult cases (3) function testGetItem() { $adapter = new Zend_Http_Client_Adapter_Test(); $adapter->setResponse(“HTTP/1.1 200 OK\r\n\r\nBLAAT”); $adapter->addResponse(“HTTP/1.1 200 OK\r\n\r\nAAP”); $foo = new Foo(); $foo->setAdapter($adapter); $this->assertEquals($foo->getItem(1), ‘blaat’); $this->assertEquals($foo->getItem(2), ‘aap’); } ∂ IT’S TESTABLE AGAIN woensdag 25 april 12
26. Difficult cases (4) Gebruik “dependency injection” ipv “tight coupling”. woensdag 25 april 12
27. Dependency Injection (1) ∂ THIGHT COUPLING AGAIN public function pay(Article $article) { $psp = new PaymentProvider(); $psp->setAmount($article->getAmount()); return $psp->pay(); } woensdag 25 april 12
28. Dependency Injection (2) ∂ DECOUPLE PAYMENT PROVIDER public function setPaymentProvider(PaymentProvider $psp) { $this->_psp = $psp; } public function getPaymentProvider() { return $this->_psp; } public function pay(Article $article) { $psp = $this->getPaymentProvider(); $psp->setAmount($article->getAmount()); return $psp->pay(); } woensdag 25 april 12
29. Dependency Injection (3) ∂ TESTABLE *AND* EXTENDABLE public function testPayAccepted() { $stub = $this->getMockBuilder(‘paymentprovider’, array(‘pay’))->getMock(); $stub->expects($this->any()) ->method(‘pay’) ->will($this->returnValue(true)); $article = new Article(); $article->setAmount(15); $foo = new Foo(); $foo->setPaymentProvider($stub); $this->assertTrue($foo->pay($article)); $this->assertEquals($user->getAmount(), 85); } woensdag 25 april 12
30. Dependency Injection (4) ∂ TESTABLE *AND* EXTENDABLE public function testPayFailed() { $stub = $this->getMockBuilder(‘paymentprovider’, array(‘pay’))->getMock(); $stub->expects($this->any()) ->method(‘pay’) ->will($this->returnValue(false)); $article = new Article(); $article->setAmount(15); $foo = new Foo(); $foo->setPaymentProvider($stub); $this->assertFalse($foo->pay($article)); $this->assertEquals($user->getAmount(), 100); } woensdag 25 april 12
31. Workshop ∂ FOLLOW INSTRUCTIONS •Login op php5dev02 •directory: workshop •http://workshop.<username>.dev/ tests/coverage •cd tests •./runtest.sh woensdag 25 april 12
32. ∂ THANK YOU FOR YOUR ATTENTION woensdag 25 april 12