It's been a while since I took the class, but I'm leaving a review now. It was very helpful because it covered a variety of ways to test code. Previously, the weight of test code was quite low... I think I neglected test code because I didn't know how to test it. Based on the information you provided, it was very helpful to find and understand other test implementation methods. I always watch your YouTube channel... It's so nice to see you working hard. And I'm grateful that you give me the opportunity to think more broadly. I'll always cheer you on.