# 单元测试（Unit testing） # 单元测试（Unit testing） Writing proper tests can assist in writing better software. If you set up proper test cases you can eliminate most functional bugs and better maintain your software. ### 整合 PHPunit 到 phalcon（Integrating PHPunit with phalcon） If you don't already have phpunit installed, you can do it by using the following composer command: ``` <pre class="calibre14">``` composer require phpunit/phpunit ``` ``` or by manually adding it to composer.json: ``` <pre class="calibre14">``` { "require-dev": { "phpunit/phpunit": "~4.5" } } ``` ``` Once phpunit is installed create a directory called ‘tests' in your root directory: ``` <pre class="calibre14">``` app/ public/ tests/ ``` ``` Next, we need a ‘helper' file to bootstrap the application for unit testing. ### PHPunit 辅助文件（The PHPunit helper file） A helper file is required to bootstrap the application for running the tests. We have prepared a sample file. Put the file in your tests/ directory as TestHelper.php. ``` <pre class="calibre14">``` <?php use Phalcon\DI; use Phalcon\DI\FactoryDefault; ini_set('display_errors',1); error_reporting(E_ALL); define('ROOT_PATH', __DIR__); define('PATH_LIBRARY', __DIR__ . '/../app/library/'); define('PATH_SERVICES', __DIR__ . '/../app/services/'); define('PATH_RESOURCES', __DIR__ . '/../app/resources/'); set_include_path( ROOT_PATH . PATH_SEPARATOR . get_include_path() ); // Required for phalcon/incubator include __DIR__ . "/../vendor/autoload.php"; // Use the application autoloader to autoload the classes // Autoload the dependencies found in composer $loader = new \Phalcon\Loader(); $loader->registerDirs( array( ROOT_PATH ) ); $loader->register(); $di = new FactoryDefault(); DI::reset(); // Add any needed services to the DI here DI::setDefault($di); ``` ``` Should you need to test any components from your own library, add them to the autoloader or use the autoloader from your main application. To help you build the unit tests, we made a few abstract classes you can use to bootstrap the unit tests themselves.These files exist in the Phalcon incubator @ <https://github.com/phalcon/incubator>. You can use the incubator library by adding it as a dependency: ``` <pre class="calibre14">``` composer require phalcon/incubator ``` ``` or by manually adding it to composer.json: ``` <pre class="calibre14">``` { "require": { "phalcon/incubator": "dev-master" } } ``` ``` You can also clone the repository using the repo link above. ### PHPunit.xml 文件（PHPunit.xml file） Now, create a phpunit file: ``` <pre class="calibre14">``` <?xml version="1.0" encoding="UTF-8"?> <phpunit bootstrap="./TestHelper.php" backupGlobals="false" backupStaticAttributes="false" verbose="true" colors="false" convertErrorsToExceptions="true" convertNoticesToExceptions="true" convertWarningsToExceptions="true" processIsolation="false" stopOnFailure="false" syntaxCheck="true"> <testsuite name="Phalcon - Testsuite"> <directory>./</directory> </testsuite> </phpunit> ``` ``` Modify the phpunit.xml to fit your needs and save it in tests/. This will run any tests under the tests/ directory. ### 简单的单元测试（Sample unit test） To run any unit tests you need to define them. The autoloader will make sure the proper files are loaded so all you need to do is create the files and phpunit will run the tests for you. This example does not contain a config file, most test cases however, do need one. You can add it to the DI to get the UnitTestCase file. First create a base unit test called UnitTestCase.php in your /tests directory: ``` <pre class="calibre14">``` <?php use Phalcon\DI; use Phalcon\Test\UnitTestCase as PhalconTestCase; abstract class UnitTestCase extends PhalconTestCase { /** * @var \Voice\Cache */ protected $_cache; /** * @var \Phalcon\Config */ protected $_config; /** * @var bool */ private $_loaded = false; public function setUp(Phalcon\DiInterface $di = NULL, Phalcon\Config $config = NULL) { // Load any additional services that might be required during testing $di = DI::getDefault(); // Get any DI components here. If you have a config, be sure to pass it to the parent parent::setUp($di); $this->_loaded = true; } /** * Check if the test case is setup properly * * @throws \PHPUnit_Framework_IncompleteTestError; */ public function __destruct() { if (!$this->_loaded) { throw new \PHPUnit_Framework_IncompleteTestError('Please run parent::setUp().'); } } } ``` ``` It's always a good idea to separate your Unit tests in namespaces. For this test we will create the namespace ‘Test'. So create a file called testsTestUnitTest.php: ``` <pre class="calibre14">``` <?php namespace Test; /** * Class UnitTest */ class UnitTest extends \UnitTestCase { public function testTestCase() { $this->assertEquals('works', 'works', 'This is OK' ); $this->assertEquals('works', 'works1', 'This will fail' ); } } ``` ``` Now when you execute ‘phpunit' in your command-line from the tests directory you will get the following output: ``` <pre class="calibre14">``` $ phpunit PHPUnit 3.7.23 by Sebastian Bergmann. Configuration read from /private/var/www/tests/phpunit.xml Time: 3 ms, Memory: 3.25Mb There was 1 failure: 1) Test\UnitTest::testTestCase This will fail Failed asserting that two strings are equal. --- Expected +++ Actual @@ @@ -'works' +'works1' /private/var/www/tests/Test/UnitTest.php:25 FAILURES! Tests: 1, Assertions: 2, Failures: 1. ``` ``` Now you can start building your unit tests. You can view a good guide here (we also recommend reading the PHPunit documentation if you're not familiar with PHPunit): <http://blog.stevensanderson.com/2009/08/24/writing-great-unit-tests-best-and-worst-practises/> | - [索引](# "总目录") - [下一页](# "API Indice") | - [上一页](# "提高性能：下一步该做什么？（Increasing Performance: What’s next?）") |