Worked on the openrewrite/rewrite-testing-frameworks repository to enhance correctness and test coverage for date-related assertions. Addressed a bug in HamcrestMatcherToAssertJ by updating the matching logic to support subclasses of java.util.Date and java.time.Instant, ensuring more reliable test assertions for date types. Incorporated SQL-based tests to validate the new behavior and confirm regression coverage. Maintained code formatting consistency across the codebase using automated formatting tools. Utilized Java, SQL, and test automation skills to deliver these improvements, focusing on robust unit testing practices. The work contributed to improved reliability and maintainability of date assertion logic within the testing framework.