Update SMIMETest.java

[cragkhit]

Hi. We are researchers from Mahidol University, Thailand, and the State University of Ceará, Brazil, working on a research project for improving open-source projects by using the latest accepted answer from Stack Overflow that matched your code snippet. We found this recommendation for improving your code from https://stackoverflow.com/a/40056844.

Note: Our study is approved by the Institutional Review Board of Mahidol University. You can find the participant information sheet explaining this study at https://drive.google.com/file/d/1ml5AqrtWQ9pnifTQyTFTcWQmwp6RuPA7/view?usp=sharing.

Disclosure: This contribution was prepared with assistance from OpenAI Codex. I reviewed and verified the resulting change.

This replaces #2371, whose branch contained unrelated divergent history.

Proposed change

Add identity and null checks before comparing the byte arrays.

Testing

• ./gradlew :util:compileTestJava passed.
• ./gradlew :util:test compiled and ran, but 10 unrelated C509CertificateTest cases failed with FileNotFoundException because their resource files were unavailable in the checkout.
• The repository Gradle configuration does not expose SMIMETest as an individually selectable test.

[dghgit]

Appreciate the effort to improve the library. It's an interesting idea, although in this case it's really the wrong spot - it's a test class and the method should never be called with anything that's null. Perhaps more importantly, the patches "if (a == b)" will return true if both a and b are null, which would be a disaster for the test's effectiveness.

For these reasons, this one I will not merge, however I would be interested to see what else you come up with.