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Guide to Automated Testing in PHP

Jun 11, 2023 pm 01:38 PM
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Automated Testing Guide in PHP

With the widespread use of the Internet, various Web applications have sprung up. In the development of web applications, the quality and efficiency of the code directly affect the stability and user experience of the application. Code quality depends on the developer's level and experience, while code efficiency requires automated testing to verify and ensure. This article will introduce you to the automated testing guide in PHP to help you improve the quality and efficiency of your application code.

1. Overview of automated testing

Automated testing refers to using certain testing tools to write test cases, execute scripts, and compare and analyze the results to check whether the software meets expectations. behavior and design goals. Automated testing can improve testing efficiency, reduce testing costs, and enhance test coverage and accuracy.

2. Introduction to PHPUnit

PHPUnit is a PHP unit testing framework that can be used to test PHP code. PHPUnit provides many practical tools and methods to make PHP unit testing simple and easy. PHPUnit supports the writing and switching of test sets, and can also help us generate reports and logs, analyze test results, and publish test results.

3. PHPUnit usage

  1. Installing PHPUnit

PHPUnit is a PHP unit testing framework that can be downloaded from the official website and carried out according to the official documentation Configuration and installation.

  1. Writing test cases

Test cases (TestCases) are the core of testing. A test case is usually a test class, which must inherit the PHPUnitFrameworkTestCase class and implement at least one test method. The name of the test method must start with "test" so that the router can find the test method.

  1. Run the test case

After writing the test case, you can use PHPUnit's CLI (Command Line Interface) to run the test case. To run a single test case you can use the following command:

vendor/bin/phpunit tests/YourTest.php

or to run a single test method:

vendor/bin/phpunit --filter testMethod tests/YourTest.php
  1. Test result

When the test is completed, PHPUnit will The test results will be displayed in the console, including the test case status and test results. At the same time, PHPUnit will also generate test reports in XML or HTML format. These reports usually include test case execution and analysis reports of the test case code.

4. PHPUnit extension

PHPUnit provides a variety of extensions that can adapt to different testing scenarios. The following is an introduction to some extensions of PHPUnit:

  1. Data Provider (DataProvider)

The data provider can provide various data for test cases to verify various aspects of the test cases. situation. A data feeder is usually a callback function that generates data and returns it to the test case. Using data feeds can help us test what various input values ​​may cause.

  1. Hook

Hook can process and modify data at a certain stage of the test execution process. For example, data cleaning and initialization can be done before or after testing.

  1. Simulator (Mock)

In the process of testing PHP code, we often need to test the interaction between different code modules. The emulator is an important tool used by PHPUnit to test this situation. The simulator can create doubles of objects and override and name the doubles' functions.

5. Automated testing practice

The following is a simple sample program, the purpose is to test the function of this program by writing test cases:

<?php
  function add($a, $b) {
      return $a + $b;
  }
?>

Before testing, we PHPUnit needs to be installed. Then, we can write a test class to test the functionality of the add function:

<?php
use PHPUnitFrameworkTestCase;

class AddTest extends TestCase {
    public function testAdd() {
        $this->assertEquals(4, add(2, 2));
        $this->assertEquals(10, add(6, 4));
    }
}
?>

Then we can run the test on the terminal:

vendor/bin/phpunit tests/AddTest.php

The test results will be output on the terminal:

PHPUnit 9.5.10 by Sebastian Bergmann and contributors.

.                                                                   1 / 1 (100%)

Time: 00:00.009, Memory: 6.00 MB

OK (1 test, 2 assertions)

You can see that both test cases passed the test.

6. Summary

Automated testing plays a vital role in PHP development. PHPUnit is a popular PHP unit testing framework that provides many practical tools and methods to help us write high-quality test cases. By reading this article, I hope you can become more familiar with the use of PHPUnit and apply automated testing in your development.

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