Worked on the luoyuxia/fluss repository to enhance the reliability of Spark’s SHOW TABLES command by developing targeted unit tests. Focused on verifying that table information is accurately retrieved from the catalog, this effort aimed to increase confidence in command behavior and reduce the risk of regressions as the catalog evolves. The work emphasized test coverage, code quality, and maintainability, rather than bug fixes. Leveraged Scala and Spark, applying robust unit testing practices and designing tests suitable for continuous integration environments. This approach improved the maintainability and reliability of catalog integration within the Spark ecosystem for future development cycles.