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README.md

Codeception Extension for Yii 2

This extension provides Codeception integration for the Yii Framework 2.0.

It provides classes that help with testing with codeception:

  • a base class for unit-tests: yii\codeception\TestCase;
  • a base class for codeception page-objects: yii\codeception\BasePage.

This repository is a git submodule of https://github.com/yiisoft/yii2. Please submit issue reports and pull requests to the main repository. For license information check the LICENSE-file.

Installation

The preferred way to install this extension is through composer.

Either run

php composer.phar require --prefer-dist yiisoft/yii2-codeception

or add

"yiisoft/yii2-codeception": "~2.0.0"

to the require section of your composer.json.

Usage

When using codeception page-objects they have some similar code, this code was extracted and put into the BasePage class to reduce code duplication. Simply extend your page object from this class, like it is done in yii2-app-basic and yii2-app-advanced boilerplates.

For unit testing there is a TestCase class which holds some common features like application creation before each test and application destroy after each test. You can configure a mock application using this class. TestCase is extended from Codeception\TestCase\Case so all methods and assertions are available. You may use codeception modules and fire events in your test, just use methods:

Getting Codeception modules

If you want to use codeception modules and helpers in your unit tests, you can do it like this:

<?php
#in your unit-test
$this->getModule('CodeHelper'); #or some other module

You also can use all actor methods by accessing actor instance like:

<?php
$this->unitTester->someMethodFromModule();

Codeception events

To fire event do this:

<?php
use Codeception\Event\TestEvent;

public function testSomething()
{
    $this->fire('myevent', new TestEvent($this));
}

this event can be catched in modules and helpers. If your test is in the group, then event name will be followed by the groupname, for example myevent.somegroup.

Special test method chaining

Execution of special tests methods is (for example on UserTest class):

tests\unit\models\UserTest::setUpBeforeClass();

    tests\unit\models\UserTest::_before();

        tests\unit\models\UserTest::setUp();

            tests\unit\models\UserTest::testSomething();

        tests\unit\models\UserTest::tearDown();

    tests\unit\models\UserTest::_after();

tests\unit\models\UserTest::tearDownAfterClass();

If you use special methods dont forget to call its parent.

Customizing application config

You may need to specify different configuration files per test cases, to do this you can make it like the following:

<?php

SomeConsoleTest extends \yii\codeception\TestCase
{
    // this is the config file to load as application config
    public $appConfig = '@app/path/to/my/custom/config/for/test.php';
}

The $appConfig property could be an array or a valid alias, pointing to the file that returns a config array. You can specify application class in the config, for example for testing console commands or features you can create _console.php config under tests/unit directory like this:

return yii\helpers\ArrayHelper::merge(
    require(__DIR__ . '/../../config/console.php'),
    require(__DIR__ . '/../_config.php'),
    [
        'class' => 'yii\console\Application',
        'components' => [
            //override console components if needed
        ],
    ]
);

and then just use your ConsoleTestCase like the following:


use \yii\codeception\TestCase;

class ConsoleTestCase extends TestCase
{
    public $appConfig = '@tests/unit/_console.php';
}

You can extend other console test cases from this basic ConsoleTestCase.

Reconfiguring components for testing

You can reconfigure a component for testing, for this purpose in your setUp method of your test case you can do this for example:

<?php

use \yii\codeception\TestCase;
use Yii;

class MailTest extends TestCase
{

    protected function setUp()
    {
        // don't forget to call parent method that will setup Yii application
        parent::setUp();

        Yii::$app->mailer->fileTransportCallback = function ($mailer, $message) {
            return 'testing_message.eml';
        };
    }

}

Tip: You also can reconfigure Yii components and properties with method Yii::configure().

You don’t need to worry about application instances and isolation because application will be created each time before any of test method will be executed in test case. You can mock application in a different way. For this purposes you have method mockApplication available in your test case. This method creates new application instance and replaces old one with it and is handy when you need to create application with a config that is different from other test methods in the current test suite. For example:


use \yii\codeception\TestCase;

class SomeMyTest extends TestCase
{

    public function testOne()
    {
        ...
    }

    public function testTwo()
    {
        $this->mockApplication([
            'language' => 'ru-RU',
            'components' => [
                'db' => [
                    //your custom configuration here
                ],
            ],
        ]);

        //your expectations and assertions goes here
    }

    public function testThree()
    {
        ...
    }

}

Additional debug output

Because of Codeception buffers all output you can’t make simple var_dump() in the TestCase, instead you need to use Codeception\Util\Debug::debug() function and then run test with --debug key, for example:

<?php

use Codeception\Util\Debug;

SomeDebugTest extends \yii\codeception\TestCase
{
    public function testSmth()
    {
        Debug::debug('some string');
        Debug::debug($someArray);
        Debug::debug($someObject);
    }

}

Then run command php codecept.phar run --debug unit/SomeDebugTest and you will see in output:

  some string

  Array
  (
      [0] => 1
      [1] => 2
      [2] => 3
      [3] => 4
      [4] => 5
  )
  
  yii\web\User Object
  (
      [identityClass] => app\models\User
      [enableAutoLogin] => 
      [loginUrl] => Array
          (
              [0] => site/login
          )
  
      [identityCookie] => Array
          (
              [name] => _identity
              [httpOnly] => 1
          )
  
      [authTimeout] => 
      [autoRenewCookie] => 1
      [idParam] => __id
      [authTimeoutParam] => __expire
      [returnUrlParam] => __returnUrl
      [_access:yii\web\User:private] => Array
          (
          )
  
      [_identity:yii\web\User:private] => 
      [_events:yii\base\Component:private] => 
      [_behaviors:yii\base\Component:private] => 
  )

For further instructions refer to the testing section in the Yii Definitive Guide.