How can SDK functions be effectively tested in PHP using PHPUnit?

To effectively test SDK functions in PHP using PHPUnit, you can create unit tests that specifically target each function within the SDK. This involves creating mock objects to simulate the behavior of external dependencies and using assertions to verify that the expected outcomes are met.

// Example code snippet for testing an SDK function using PHPUnit

use PHPUnit\Framework\TestCase;

class SDKTest extends TestCase
{
    public function testSDKFunction()
    {
        // Create a mock object for any external dependencies
        $dependencyMock = $this->createMock(ExternalDependency::class);
        
        // Set up any necessary data or conditions for the test
        $sdk = new SDK($dependencyMock);
        
        // Call the SDK function being tested
        $result = $sdk->sdkFunction();
        
        // Use assertions to verify the expected outcome
        $this->assertEquals('expectedResult', $result);
    }
}