unit testing like a pirate #wceu 2013

UNIT TESTINGlike a

cPirate

WordCamp Europe 2013

with

pirate dunbarSaturday, October 5, 13

UNIT TESTING like A PIRATE — @ptahdunbar #wceu

YES,I am a Pirate.

Saturday, October 5, 13


nAPP PlatformWordPress as a




Video chat marketplace for experts to monetize

their know-how.




“I think WordPress is going in a direction that isn’t well framed or

described by any existing alternatives or historical platforms.”

— Matt Mullenweghttp://jakegoldman.me/2013/09/wordpress-app-platform/


http://jakegoldman.me/2013/09/wordpress-app-platform/

http://jakegoldman.me/2013/09/wordpress-app-platform/

“Plugins represent the heartbeat ofWordPress.”



• sdsdsd


“The result is that a lot of the plugins are written in poor code

and turn out to be poorly compatible with other plugins.”

— Yoasthttp://yoast.com/plugin-future/


http://yoast.com/plugin-future/

http://yoast.com/plugin-future/


Manual Testing


• sdsdsd


Problems of manual testing

1. Ad-hoc ☹


• sdsdsd



1. Ad-hoc ☹2. Slow & Error Prone ☹


• sdsdsd



1. Ad-hoc ☹2. Slow & Error Prone ☹3. High risk that I missed something ☹


• sdsdsd




what we need



what we need

• Fast & Instant feedback



what we need


• Reusable and organized



what we need


• Reusable and organized

• Verify that I didn’t break anything.


Unit Testing Series



Unit Testing Series


1. Unit Testing like a Pirate

2. Buccaneering the high seas with PHPUnit

3. Mo’ plugins mo’ problems

4. Steering clear of wreckages and skulls

5. Avast! TDD for sailors and salty dogs



what is unit testing

“An automated piece of code that invokes your application code to

check a single assumption.”

— Pirate Dunbar



what is unit testing

“Separatingthe application

design & implementation

process.”



what is PHPUNIT

“A command line tool that runs unit tests & reports their results.”



what is PHPUNIT

$>phpunit



what is PHPUNIT

Time: 1 sec, Memory: 8.75Mb

OK (200 tests, 355 assertions)



what is PHPUNIT

There was 1 failure:

1) WPSkeletonPluginTest\AutoloadTest::testThatItsTestingTime

What time is it? - it's testing time! :D

/Users/ptah/Sites/wp.t/public/content/mu-plugins/wp-skeleton-plugin/tests/WPSkeletonPluginTest/AutoloadTest.php:9

FAILURES!

Tests: 2, Assertions: 1, Failures: 1.



what is PHPUNIT

Test Casea set of conditions or variables that you set up in order to assert an expected outcome.



what is PHPUNIT

Test SUITEA collection of test cases.


<?php

class SubscriptionTest extends PHPUnit_Framework_TestCase{

// test cases ...

public function testHasAccessWithPassDueCustomerBlocksAccess()

{

// AAA

}

public function testAddSubscriptionWithInvalidCustIdReturnsWPError()

{

// AAA

}

}




Assertions“a way of explicitly checking the

assumptions that your code makes”



n• $this->assertTrue();

• $this->assertEquals();

• $this->assertContains();

• $this->assertGreaterThan();

• $this->assertNotNull();

• $this->assertFalse();

• $this->assertNotEquals();

• $this->assertContainsOnly();

• $this->assertLessThan();

• $this->assertType();

Assertions Appendix:http://phpunit.de/manual/3.7/en/appendixes.assertions.html

common Assertions


http://phpunit.de/manual/3.7/en/appendixes.assertions.html




“How do I actually write out the test cases?”


http://www.flickr.com/photos/mutsmuts/4695658106





Anatomy of a test case




1. a

2. A

3. A




1. A

2. A

3. Assert (check for the expected value)




1. A

2. Act (call the method/trigger the action)





1. arrange (the context)

2. Act (call the method/trigger the action)



<?phpclass CalculatorTest extends PHPUnit_Framework_TestCase{

// test cases ...

public function testAddReturnsSumOfTwoPositiveIntegers()

{

// Arrange

// Act

// Assert

}

}


int Calculator::add(int $a, int $b);



// test cases ...


{

// Arrange

// Act

// Assert

}

}




// test cases ...


{

// Arrange

// Act

// Assert

$this->assertEquals(3, $result);

}

}




// test cases ...


{

// Arrange

// Act

$result = $calculator->add($a, $b);

// Assert


}

}




// test cases ...


{

// Arrange

$calculator = new Calculator();

$a = 1;

$b = 2;

// Act


// Assert


}

}




// test cases ...


{

// Arrange

$calculator = new Calculator();

$a = 1;

$b = 2;

// Act


// Assert


}

}


Time: 148 ms, Memory: 2.75Mb

OK (1 test, 1 assertions)


<?php

class LiveNinjaCacheTest extends PHPUnit_Framework_TestCase{

// test cases ...

public function testSetWithNewDataPersistsToCache(){

// Arrange

// Act

// Assert

}}


bool Cache::set(string $key);


<?php


// test cases ...


// Arrange

// Act

// Assert

}}



<?php


// test cases ...


// Arrange

// Act

// Assert$this->assertSame( [ 1, 2, 3 ], $cache->get(‘user_ids’) );

}}



<?php


// test cases ...


// Arrange

// Act$cache->add(‘user_ids’, [ 1, 2, 3 ]);


}}



<?php


// test cases ...


// Arrange$cache = new \LiveNinja\Storage\Cache();



}}



<?php

class UserServiceTest extends PHPUnit_Framework_TestCase{

// test cases ...

public function testPersistReturnsWPErrorIfItDoesntContainRequiredFields(){

// Arrange

// Act

// Assert

}}


object|WP_Error User\Service::persist(User $user);


<?php


// test cases ...


// Arrange

// Act

// Assert

}}



<?php


// test cases ...


// Arrange

// Act

// Assert$this->assertInstanceOf(‘WP_Error’, $user);

}}



<?php


// test cases ...


// Arrange

// Act$user = $service->persist($inCompleteUserObject);


}}



<?php


// test cases ...


// Arrange$service = new \LiveNinja\User\Service;$inCompleteUserObject = new \LiveNinja\User\Entity(...);



}}



<?php


// test cases ...

public function testGetNinjasWithBlackBeltSubscriptionQuery(){

// Arrange

// Act

// Assert

}}


array|WP_Error User\Service::get_ninjas(array $args);


<?php


// test cases ...


// Arrange

// Act

// Assert

}}



<?php


// test cases ...


// Arrange

// Act

// Assert$this->assertContains($expected, $service->getLastResultAsSQL());

}}



<?php


// test cases ...


// Arrange

// Act$service->get_ninjas([‘plan’ => ‘blackbelt’]);


}}



<?php


// test cases ...


// Arrange$expected = “SELECT * FROM ninjas WHERE ...”;$service = new \LiveNinja\User\Service;


// Assert$this->assertSame($expected, $service->getLastResultAsSQL());

}}



<?php


// test cases ...


// Arrange$expected = “SELECT * FROM ninjas WHERE ...”;$service = new \LiveNinja\User\Service;



}}






nWAYS TO TEST CODE

• test if/else conditionals

• test all cases in switch

• verify loops contain proper data.

• Check for expected state

• Check return value type

• Pass unexpected data

• Verify correct amount

• assertContains for SQL Queries

• Verify that third party method was called.

• $this->assertType();

• etc...



nWAYS TO kickstart your brain

• write out list of requirements for each feature

• do the UI first


cwp skeleton plugin

https://github.com/ptahdunbar/wp-skeleton-plugin/





Thank you!

Slides - http://ptahdunbar.com/

cPirate Dunbar


http://ptahdunbar.com

http://ptahdunbar.com

unit testing like a pirate #wceu 2013

Technology

sdsdsd unit testing

wceu manual testing

testing time

unit tests

pirate dunbar

wceu napp platform wordpress

phpunit time

phpunit test case