可以看这篇文章 https://www.sqlite.org/testing.html
As of version 3.39.0 (2022-06-25), the SQLite library consists of approximately 151.3 KSLOC of C code. (KSLOC means thousands of "Source Lines Of Code" or, in other words, lines of code excluding blank lines and comments.) By comparison, the project has 608 times as much test code and test scripts - 92038.3 KSLOC.
sqlite 的部分测试是不开源、专有的。
