How to test RESTful APIs and perform HTTP requests with PHPUnit?

To test RESTful APIs and perform HTTP requests with PHPUnit, you can follow these steps:

Install PHPUnit: If you haven't already, install PHPUnit by following the official documentation.
Create a Test Class: Create a new test class by extending the PHPUnit\Framework\TestCase class.

use PHPUnit\Framework\TestCase;

class APITest extends TestCase
{
    // Test methods will go here
}

Set Up and Tear Down: Use the setUp() and tearDown() methods to set up and tear down any required resources for the test cases.

protected function setUp(): void
{
    // Set up any required resources
}

protected function tearDown(): void
{
    // Clean up any created resources
}

Write Test Cases: Write test methods to perform different HTTP requests and assertions. Use the Guzzle HTTP client (or any other HTTP client library) to send requests and obtain responses.

public function testGetRequest()
{
    $client = new GuzzleHttp\Client();
    $response = $client->get('http://example.com/api');

    $this->assertEquals(200, $response->getStatusCode());
    $this->assertJson($response->getBody());
}

public function testPostRequest()
{
    $client = new GuzzleHttp\Client();
    $response = $client->post('http://example.com/api', [
        'json' => ['name' => 'John', 'age' => 25]
    ]);

    $this->assertEquals(201, $response->getStatusCode());
    $this->assertJson($response->getBody());
}

Run Tests: Run the tests using the phpunit command.

phpunit --bootstrap vendor/autoload.php path/to/testfile.php

Make sure to replace "vendor/autoload.php" with the correct path to the PHPUnit autoloader and "path/to/testfile.php" with the actual path to your test file.

Analyze Test Results: PHPUnit will run the tests and provide a summary of the results. You can view the details of each test case to see if they passed or failed.

Note: Remember to check the PHPUnit and Guzzle HTTP client documentation for more details on how to use their features and customize your tests according to your specific needs.