In PHP payment processing, how do I write unit tests?

To write unit tests for a payment processing system using PHP, you can utilize testing frameworks such as PHPUnit. Here’s a simple example of how you can create unit tests for your payment processing functionality.

<?php use PHPUnit\Framework\TestCase; class PaymentProcessorTest extends TestCase { public function testProcessPayment() { $processor = new PaymentProcessor(); $result = $processor->processPayment(100, 'valid_card_token'); $this->assertTrue($result['success']); $this->assertEquals('Payment processed successfully', $result['message']); } public function testProcessPaymentWithInvalidCard() { $processor = new PaymentProcessor(); $result = $processor->processPayment(100, 'invalid_card_token'); $this->assertFalse($result['success']); $this->assertEquals('Invalid card token', $result['message']); } } ?>

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