Codeception

AUTOMATED TESTING WITH
CODECEPTION
PHP automated testing framework

Jonathan Lau

Smokehouse Software | Jonathan Lau | jon@smokehousesoftware.com

MOTIVATION + BIO
•

Quick start guide for codeception

•

Experience with running it in a Cake based project

•

Introduce it as a alternative choice


TEST STRATEGY
What do we use these days?

WAYS TO TEST
•

Unit test

•

Functional test

•

White box testing

•

•

Full knowledge of the code
base

Knowledge of input and
expected output

•

No browser emulation

•

!

Run script during build /
check out

•

Acceptance test
•

Yes, still need this for sanity
sake


EFFORT VS RETURN
•

•

Unit tests are easy to write
but it can’t cover integration
issue

Functional / acceptance
tests can cover the end to
end behavior but it can take
a while to write and some
effort to maintain

Maintenance effort
Acceptance test

Functional test
Unit test

Coverage


ACCEPTANCE TEST
Let the robot do the clicking

ACCEPTANCE TEST
•

Browser emulator: Selenum or Mink

•

Select on-screen elements by text or path

•

Supported actions: click, enter text, drag drop etc.

•

Coverage can be an issue

•

Really SLOW

EXAMPLE CODE
<?php

$I = new WebGuy($scenario);

$I->amOnPage('/');

$I->click('Sign Up');

$I->submitForm('#signup', array('username' => 'MilesDavis', 'email' =>
'miles@davis.com'));

$I->see('Thank you for Signing Up!');

?>

FUNCTIONAL TEST
•

Very similar concept as acceptance test

•

No browser emulation

•

Emulate the actual web request instead

•

Might need hook into the framework to introduce a test
mode.

•

Can’t test javascript / AJAX

EXAMPLE CODE
<?php

$I = new TestGuy($scenario);

$I->amOnPage('/');

$I->click('Sign Up');

$I->submitForm('#signup', array('username' => 'MilesDavis', 'email' => 'miles@davis.com'));

$I->see('Thank you for Signing Up!');

$I->seeEmailSent('miles@davis.com', 'Thank you for registration');

$I->seeInDatabase('users', array('email' => 'miles@davis.com'));

?>

UNIT TEST
•

Friendly only to developer

•

Running the test subject in isolation and surrounding pieces are
stubbed out

•

It’s good for validating logic correctness

•

Can’t validate integration issues

•

Built on top of PHP Unit and has more tooling to help write test
faster

EXAMPLE CODE
<?php

// we are testing the public method of User class.

$I = new CodeGuy($scenario);

$I->testMethod('User.update');

$I->haveStubClass($unit = Stub::make('User'));

$I->dontSeeInDatabase('users', array('id' => 1, 'username' => 'miles'));

$I->executeTestedMethodOn($unit, 1, array('username' => 'miles'));

$I->seeMethodInvoked($unit, 'save');

$I->seeInDatabase('users', array('id' => 1, 'username' => 'miles'));

?>

GENERAL PITFALLS
•

Javascript pop up box

•

Drag and drop - takes a bit more work to get it to
work

•

Delay tuning - variance in the latency on the web
servers

•

Browser session is refreshed between test ﬁles

WHAT WORKS FOR US
•

Integration risk is always
larger than algorithmic
correctness

•

Automating acceptance test
is a huge win

•

Automating functional test
should be next

•

Unit test… meh…

KILL BUGS
LIKE THE
TERRAINS
Good luck and thanks

!

jon@smokehousesoftware.com
!

Contributors: Kenneth Chiu


Codeception

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