Add TestPixActionQrCode

[gcatanese]

Add unit tests for PixActionQrCode, this is part of troubleshooting #1534

[gemini-code-assist]

Summary of Changes

Hello @gcatanese, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a new unit test specifically for the PixActionQrCode functionality. The primary goal is to ensure the robust and accurate handling of QR code-related payment responses, particularly for Pix payments. This addition is part of a broader effort to troubleshoot and resolve an existing issue, enhancing the reliability of the payment processing logic.

Highlights

• New Unit Test for Pix QR Code Action: A new test method, TestPixActionQrCode, has been added to CheckoutTest.java. This test is designed to verify the correct processing of payment responses containing Pix QR code actions, ensuring that the PSP reference, QR code type, payment method type, and QR code data are correctly extracted and validated.
• Addition of Mock QR Code Response File: A new mock JSON file, pixQrCodeResponse.json, has been created under src/test/resources/mocks/checkout/. This file provides a realistic mock response for a Pix QR code payment, which is crucial for the new unit test to simulate API responses without making actual network calls.

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[gemini-code-assist]

Code Review

This pull request adds a unit test for PixActionQrCode, which is a good addition to improve test coverage. I've found a few areas for improvement in the new test, including following standard naming conventions, correcting a data discrepancy, and making assertions more robust and comprehensive. Please see my detailed comments.