In this reflection, the author comprehends several key principles of evaluation, assessment, and testing. They understand that evaluation considers broader factors that influence learning, while assessment involves collecting information on a learner's abilities through various techniques including tests. The author also comprehends principles of effective tests, including authenticity in reflecting real-world language use, practicality, reliability in producing consistent results, validity in measuring the intended skills, interactiveness in motivating students, and transparency in clearly communicating standards to learners. Security and the ability to recycle well-designed test materials is also discussed as important.