What are the issues related to com.google.zxing.NotFoundException and 400 BadRequest in the Spring Boot QR Code example's JUnit tests, specifically in the integration and service tests?

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The issues related to com.google.zxing.NotFoundException and 400 BadRequest in the Spring Boot QR Code example's JUnit tests can be due to several reasons:

1. com.google.zxing.NotFoundException: This error occurs when the QR code being scanned is not found. This can happen if the QR code is not properly generated or if it is corrupted. It could also be due to a mismatch between what is expected in the QR code and what is received.

2. 400 BadRequest: This error occurs when there is an issue with the request being sent, such as missing or invalid parameters or incorrect data in the request body.

In the integration and service tests, these errors can be caused by issues with the code being tested, such as incorrect implementations of QR code generation or scanning. They can also be caused by issues with the testing environment, such as incorrect test data or configuration.

To resolve these issues, it is important to review the code and test data to identify any issues that could be causing the errors. Debugging can also be used to identify the root cause of the issue. Additionally, ensuring that the testing environment is set up correctly can help to prevent these errors from occurring.