Software should be perfect, but it isn't! Bugs in the software ranges from small "inoffensive ones" to the ones that makes the news when a bunch of credit card data is stole. On this talk we will review different testing methodologies and tools, and we will focus on using PHPUnit to assert how your software works and how to exterminate your bugs.

1. RICARDO MELO
PHPUnit your bug
exterminator
Follow this topic:
@rjsmelo, #phpunit
PHPLX – 07 December 2013

2. RICARDO MELO
CTO @ DRI
● PHP, Mysql, Linux and lots of other
OSS
● ZCE, RHCE, LPI 3, ITIL, etc
● +10 years building (and breaking)
things
●
@rjsmelo
2

3. About
14 Year old academic spin-off
● Pragmatic OSS Orientation
● PHP, Mysql, SugarCRM, Drupal,
JavaScript, Linux, etc.
● Crafters, Integrators
●
●
Always looking for software developers
–
Yes, right now!
@rjsmelo
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4. Outline
Testing Methodologies
● Testing Tools Ecosystem
● What's PHPUnit
● The "Hello World" test
● How to run your tests
● Other assertions
● Other PHPUnit topics
● The bug hunting work flow
●
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.
4

5. Testing and Development Methodologies
Unit, Integration, System and
Acceptance Testing
● CMMI/Waterfall, Agile and XP
● TDD and BDD
●
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.
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6. Testing Tools Ecosystem
PHPUnit
● Behat
● Selenium
● Codeception
● And many more
●
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7. What's PHPUnit
xUnit family for PHP
● Uses assertions to check the behavior
of the unit
● But it can handle other tests like
integration and system
●
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8. Installing PHPUnit
●
Pear
pear config-set auto_discover 1
pear install pear.phpunit.de/PHPUnit
phpunit --version
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9. Installing PHPUnit
●
Composer
{
"require-dev": {
"phpunit/phpunit": "3.7.*"
}
}
composer install
./vendor/bin/phpunit --version
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10. The "Hello World" test
<?php
namespace Phplx;
class HelloWorld {
public function say(){
return "Hello World";
}
}
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11. The "Hello World" test
<?php
namespace PhplxTestsHelloWorld;
use PHPUnit_Framework_TestCase
use PhplxHelloWorld;
class HelloWorldTest extends PHPUnit_Framework_TestCase
{
public function testHelloWorld(){
$obj = new HelloWorld();
$this->assertEquals("Hello World", $obj->say());
}
}
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12. How to run your tests
# using PEAR / PHAR
phpunit --bootstrap vendor/autoload.php tests/
# using composer
./vendor/bin/phpunit tests/
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.
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13. How to run your tests – bootstrap.php
<?php
use PhplxApp;
require_once dirname(__DIR__) . "/vendor/autoload.php";
$app = new App();
$app->initHelloWorldApplication();
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14. How to run your tests – phpunit.xml
<phpunit
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:noNamespaceSchemaLocation="http://schema.phpunit.de/3.7/phpunit.xs
d"
bootstrap="tests/bootstrap.php"
stopOnError="false"
stopOnFailure="false"
stopOnIncomplete="false"
stopOnSkipped="false"
>
<testsuites>
<testsuite name="Hello World Test Suite">
<directory suffix="Test.php">tests</directory>
</testsuite>
</testsuites>
</phpunit>
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15. How to run your tests – phpunit
$ ./vendor/bin/phpunit
PHPUnit 3.7.28 by Sebastian Bergmann.
Configuration read from /home/rjsmelo/phplx/phpunit.xml
...
Time: 42 ms, Memory: 3.25Mb
OK (3 tests, 3 assertions)
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16. Other assertions
●
There is a HUGE list of assertions
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17. Use specific assertions - assertInstanceOf
<?php
use PhplxHelloWorld;
class InstanceOfTest extends PHPUnit_Framework_TestCase
{
public function testTrue(){
$obj = new stdClass();
$this->assertTrue(
$obj instanceof PhplxHelloWorld);
}
public function testInstanceOf(){
$obj = new stdClass();
$this->assertInstanceOf(
'PhplxHelloWorld', $obj);
}
}
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18. Use specific assertions - assertInstanceOf
PHPUnit 3.7.28 by Sebastian Bergmann.
[...]
1) InstanceOfTest::testTrue
Failed asserting that false is true.
2) InstanceOfTest::testInstanceOf
Failed asserting that stdClass Object () is an instance of class
"PhplxHelloWorld".
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19. Use specific assertions - JsonString
<?php
use PhplxObject;
class JsonStringTest extends PHPUnit_Framework_TestCase
{
protected $jsonString =
'{"someKey":"some thing","otherKey":"other thing"}';
public function testEquals(){
$obj = new Object();
$this->assertEquals(
$this->jsonString, $obj->myPreciousJson());
}
public function testJsonString(){
$obj = new Object();
$this->assertJsonStringEqualsJsonString(
$this->jsonString, $obj->myPreciousJson());
}
}
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20. Use specific assertions - JsonString
PHPUnit 3.7.28 by Sebastian Bergmann.
[...]
1) JsonStringTest::testEquals
Failed asserting that two strings are equal.
--- Expected
+++ Actual
@@ @@
-'{"someKey":"some thing","otherKey":"other thing"}'
+'{"someKey":"some value","otherKey":"other thing"}'
2) JsonStringTest::testJsonString
Failed asserting that two objects are equal.
--- Expected
+++ Actual
@@ @@
stdClass Object (
'someKey' => 'some thing'
+
'someKey' => 'some value'
'otherKey' => 'other thing'
)
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21. Other PHPUnit topics
Setup / Teardown
● Data providers
● Test doubles
●
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22. The bug hunting work flow
Gather information on the problem
● Reproduce the problem
● Capture that as a test
● Fix it (ok... this sometimes is hard)
● All green... mission accomplished
●
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23. The community challenge
Go to your favorite PHP project
● Or go to
https://github.com/trending?l=php
and pick one
● Fix Some Bugs!
●
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24. Thank you

25. QA
Follow this topic:
@rjsmelo, #phpunit
Code: https://github.com/rjsmelo/talk-phpunit
Feedback: https://joind.in/talk/view/10305

26. www.dri-global.com
@rjsmelo
ricardo.melo@dri-global.com