How to use Codeception for functional testing in php?

In the modern web application development process, functional testing is an important aspect to ensure application quality. Codeception is a popular PHP testing framework that provides a simple API and easy-to-understand syntax to help us write efficient web functional tests. This article will introduce how to use Codeception for functional testing.

1. Install Codeception

First, we need to install Codeception. Codeception supports several ways to install, including Composer, phar package and manual download. Here we use Composer to install and execute the following command:

composer require codeception/codeception --dev

After the installation is completed, we can generate the codeception.yml configuration file in the project root directory:

./vendor/bin/codecept bootstrap

2. Write test cases

1. Create test cases

The test cases in Codeception are divided into different levels, including unit tests, integration tests and functional tests. In this article, we focus on functional testing.

Use the following command to create a test suite named FunctionalTests:

./vendor/bin/codecept generate:suite functional

In the test case directory, a FunctionalTests# containing test cases will be automatically generated. ##folder.

Visit the webpage

Next, we need to define the webpage we want to test. Use the following command to generate a test case file. For example, the web page we want to test is

http://example.com:

./vendor/bin/codecept generate:cept functional ExampleTest

In the generated test case file, we can use

$I->amOnPage method to access the web page:

<?php 
$I = new FunctionalTester($scenario);
$I->amOnPage('http://example.com');
$I->see('Hello, world!');

In this test case, we use the

$I->amOnPage method to open the web page. Then, we use the $I->see method to check whether the text Hello, world! exists in the web page.

User interaction

If the function we want to test requires user interaction, we need to use the method provided by Codeception to simulate user operations. For example, we want to enter text into a web page:

<?php 
$I = new FunctionalTester($scenario);
$I->amOnPage('http://example.com');
$I->fillField('username', 'testuser');
$I->click('Submit');
$I->see('Welcome, testuser!');

In this test case, we use the

$I->fillField method to fill in the username form field. Then, we use the $I->click method to simulate the user clicking the Submit button. Finally, we use the $I->see method to check whether the text Welcome, testuser! exists in the web page.

Database Testing

If our application needs to interact with the database, we need to use the database testing function provided by Codeception. In the test case, we can use the

$I->haveInDatabase method to add data to the database and the $I->seeInDatabase method to check whether the data exists.

For example, the function we want to test is to add a user record to the database:

<?php 
$I = new FunctionalTester($scenario);
$I->amOnPage('http://example.com/create-user.php');
$I->fillField('username', 'testuser');
$I->fillField('password', 'testpassword');
$I->click('Submit');
$I->seeInDatabase('users', ['username' => 'testuser']);

In this test case, we use the

$I->haveInDatabase method A record is added to the users table. We then use the $I->seeInDatabase method to check whether there is a record with the username field being testuser.

3. Execute test cases

After writing the test cases, we need to execute the test cases. Execute the following command to run all test cases:

./vendor/bin/codecept run

If we only want to run the

FunctionalTests test suite, we can use the following command:

./vendor/bin/codecept run functional

4. Summary

Using Codeception for functional testing can help us ensure the quality of the application. In this article, we learned how to write test cases and execute them. Codeception provides a simple API and easy-to-understand syntax, which can help us quickly write efficient web functional tests.

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