This document discusses software development best practices using an iterative approach called test-driven development (TDD). It recommends designing in small increments, writing tests before implementing code to verify it meets requirements, and continually refactoring code and re-testing. Diagrams show splitting projects into small user stories and tasks to deliver working software quickly in a predictable, sustainable way while avoiding bottlenecks.

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13. Deliver consistently to avoid
bottlenecks
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25. Analyze
Design
Time
Code
Test/Bug Fixing
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26. 20% done
=
100% usable
Doing the same time
Small slices of work
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27. Design
Test
Implement
Test
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28. Design
Test Test
Implement
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29. Design
Test Test
Implement
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32. • User Story: smallest piece of functionality
• Good Story:
• Independent
• Negotiable
• Valuable
• Estimate-able
• Small
• Testable
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33. • Design: figure out what you want to
do
• Test: write a test to express the
design
• It should FAIL
• Implement: write the code
• Test again
• It should PASS
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36. <?php
App::uses('User', 'Model');
class UserTest extends CakeTestCase {
public $fixtures = array('app.user');
public $autoFixtures = false;
public $Dbo = null;
public function setUp() {
parent::setUp();
$this->Dbo = ConnectionManager::getDataSource('test');
$this->User = ClassRegistry::init('User');
// start transaction
$this->assertEquals(true, $this->Dbo->begin());
}
public function tearDown() {
parent::tearDown();
// rollback data
$this->assertEquals(true, $this->Dbo->rollback());
}
}
?>
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39. [1]. http://www.agiledata.org/
[2]. http://agilemanifesto.org/principles.html
[3]. http://www.phpunit.de/
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