SfCon: Test Driven Development

Test Driven Development
Saturday, June 23, 2012

@AUGUSTOHP

@ALGANET


• Evolução dos testes

AGENDA • Motivações

• TDD (interativo)


EVOLUÇÃO DOS TESTES


var_dump($coisa);


//var_dump($coisa);


Breakpoints e Watchers!


Testes automatizados


ão
açautomatizados
ﬁc
Testes
ri
Ve


Test Driven Development


MOTIVAÇÃO


CÓDIGO LIMPO QUE
FUNCIONA


Esse é o código

CÓDIGO LIMPO QUE
FUNCIONA


Esse “somos nozes”

CÓDIGO LIMPO QUE
FUNCIONA


Objetivo do TDD

CÓDIGO LIMPO QUE
FUNCIONA


2 REGRAS


CÓDIGO NOVO = TESTE


REFATORE


O MANTRA DO TDD


• Vermelho : Escreva um teste (ele vai falhar)



• Verde : Faça o teste funcionar



• Verde : Faça o teste funcionar

• Refatore


SESSÃO INTERATIVA DE TDD


O que faremos?


• Lista de tarefas



• Título


1 <?php
2 class TaskTest extends PHPUnit_Framework_TestCase
3 {
4 public function testTitle()
5 {
6 $task = new SfConTask;
7 $title = 'Teste';
8 $task->setTitle($title);
9 $this->assertEquals($title, $task->getTitle());
10 $this->assertEquals($title, (string) $task);
11 }
12 }


1 PHPUnit 3.6.10 by Sebastian Bergmann.
2
3
4 Fatal error: Class 'SfConTask' not found in /Users/
augustopascutti/Desktop/tdd/TaskTest.php on line 6


1 <?php
2 namespace SfCon;
3
4 class Task
5 {
6 protected $title;
7
8 public function setTitle($string)
9 {
10 $this->title = $string;
11 return $this;
12 }
13
14 public function getTitle()
15 {
16 return $this->title;
17 }
18
19 public function __toString()
20 {
21 return (string) $this->getTitle();
22 }
23 }

2
3 .
4
5 Time: 0 seconds, Memory: 2.75Mb
6
7 OK (1 test, 2 assertions)



• Título

• ID


1 <?php
2 require 'SfCon/Task.php';
5 {
6 // ...
7 public function testId()
8 {
9 $task = new SfConTask();
10 $id = 1;
11 $task->setId($id);
12 $this->assertEquals($id, $task->getId());
13 }
14 }


2
3 .
4 Fatal error: Call to undefined method SfConTask::setId
() in /Users/augustopascutti/Desktop/tdd/TaskTest.php on
line 19


1 <?php
3
5 {
6 // ...
7 public function testId()
8 {
10 $id = 1;
11 $task->setId($id);
12 $this->assertEquals($id, $task->getId());
13 }
14 }



• Título

• ID

• Completa?


1 <?php
3
5 {
6 // ...
7 public function testDone()
8 {
10 $this->assertFalse($task->isDone());
11 $task->setDone(); // Default: true
12 $this->assertTrue($task->isDone());
13 $task->setDone(false);
14 $this->assertFalse($task->isDone());
15 }
16 }


2
3 ..
4 Fatal error: Call to undefined method SfCon
Task::isDone() in /Users/augustopascutti/Desktop/tdd/
TaskTest.php on line 26


1 <?php
2 namespace SfCon;
3
4 class Task
5 {
6 // ...
7 protected $done = false;
8
9 // ...
10 public function setDone($bool=true)
11 {
12 $this->done = (boolean) $bool;
13 return $this;
14 }
15
16 public function isDone()
17 {
18 return $this->done;
19 }
20 }


2
3 ...
4
6
7 OK (3 tests, 6 assertions)



• Título

• ID

• Completa?

• Salvar tarefa


1 <?php
3
5 {
6 // ...
7 public function testInsert()
8 {
9 $pdo = new Pdo('sqlite::memory:');
10 $pdo->exec('CREATE TABLE tasks (
11 id INTEGER PRIMARY KEY,
12 title TEXT,
13 done INTEGER
14 )');
15 $task = new SfConTask($pdo);
16 $expectId = 1;
17 $task->setTitle('Test');
18 $task->insert(); // Insert defines ID
19 $this->assertEquals($expectId, $task->getId());
20 }
21 }


1 <?php
2 namespace SfCon;
3
4 class Task
5 {
6 // ...
7 protected $pdo;
8
9 public function __construct(Pdo $pdo=null)
10 {
11 if (!is_null($pdo))
12 $this->pdo = $pdo;
13 }
14 // ...
15 public function insert()
16 {
17 $sql = 'INSERT INTO tasks (id, title, done) VALUES (?, ?, ?)';
18 $st = $this->pdo->prepare($sql);
19 $st->bindValue(1, $this->getId());
20 $st->bindValue(2, $this->getTitle());
21 $st->bindValue(3, $this->isDone());
22 $result = $st->execute();
23 $this->setId($this->pdo->lastInsertId());
24 return $result;
25 }
26 }


2
3 ....
4
6


2
3 Task
4 [x] Title
5 [x] Id
6 [x] Done
7 [x] Insert


1 <?php
3
5 {
6 public function testSetterGetterForTitle()
7 {
8 // ...
9 }
10
11 public function testSetterGetterForId()
12 {
13 // ...
14 }
15
16 public function testSetterGetterForDone()
17 {
18 // ...
19 }
20 }


2
3 Task
4 [x] Setter getter for title
5 [x] Setter getter for id
6 [x] Setter getter for done
7 [x] Insert


• Lista de tarefas • Cobrir variações

• Título

• ID

• Completa?

• Salvar tarefa


1 <?php
3
5 {
6 // ...
7 public function provideValidTitles()
8 {
9 return array(
10 array('This is a valid title'),
11 array('This is also a valid title ...'),
12 array('Hello World'),
13 array('Hakuna Matata'),
14 array('Do some more tests')
15 );
16 }
17
18 /**
19 * @dataProvider provideValidTitles
20 */
21 public function testSetterGetterForTitle($title)
22 {
23 $this->fixture->setTitle($title);
24 $this->assertEquals($title, $this->fixture->getTitle());
25 $this->assertEquals($title, (string) $this->fixture);
26 }
27 // ...

1 <?php
3
5 {
6 protected $fixture;
7 protected $pdo;
8
9 public function setUp()
10 {
11 $this->pdo = new Pdo('sqlite::memory:');
12 $this->fixture = new SfConTask($this->pdo);
13 $this->pdo->exec('CREATE TABLE IF NOT EXISTS tasks (
14 id INTEGER PRIMARY KEY,
15 title TEXT,
16 done INTEGER
17 )');
18 }
19
20 public function tearDown()
21 {
22 $this->pdo->exec('DROP TABLE tasks');
23 }
24 // ...
25 }

2
3 ..............
4
6


CUIDADO COM O 100% DE
COVERAGE


Linhas não testadas


1 <?php
3
5 {
6 /**
7 * @dataProvider provideValidTitles
8 */
9 public function testSetterGetterForTitle($title)
10 {
11 $instance = $task->setTitle($title);
12 $this->assertEquals($task, $instance);
13 $this->assertEquals($title, $task->getTitle());
14 $this->assertEquals($title, (string) $task);
15 }
16 }



• Título • Mocks / Stubs

• ID

• Completa?

• Salvar tarefa


1 <?php
3
5 {
7 {
8 $con = array('sqlite::memory:');
9 $met = array('prepare', 'lastInsertId');
10 // ...
11 $this->pdo = $this->getMock('Pdo', $met, $con);
12 $this->pdo->expects($this->once())
13 ->method('prepare')
14 ->with($this->equalTo(SfConTask::SQL_INSE
15 ->will($this->returnValue($mockIns));
16 }
17 }


1 <?php
3
5 {
7 {
8 // ...
9 $met = array('bindValue', 'execute');
10 $mockIns = $this->getMock('PdoStatement', $met);
11 $mockIns->expects($this->exactly(3))
12 ->method('bindValue')
13 ->with($this->greaterThan(0),
14 $this->anything());
15 // ...
16 }
17 }


1 <?php
3
5 {
7 {
8 // ...
9 $mockIns->expects($this->once())
10 ->method('execute')
11 ->will($this->returnValue(true));
12 // ...
13 }
14 }


1 <?php
3
5 {
7 {
8 // ...
9 $this->pdo->expects($this->once())
10 ->method('lastInsertId')
11 ->will($this->returnValue(1));
12
13 $task = new SfConTask($this->pdo);
14 $task->setTitle($title);
15 $task->insert();
16 $this->assertEquals($expectId, $task->getId());
17 }
18 }


2
3 ...............
4
6



• Título • Mocks / Stubs

• ID •
tas?
Bugs regressivos

u n
• Completa?
e rg
• Salvar tarefa
p


SfCon: Test Driven Development

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