Take a look at their description of how SQLite is tested: https://www.sqlite.org/testing.html https://www.sqlite.org/testing.html I think a lot of projects tha

Take a look at their description of how SQLite is tested: https://www.sqlite.org/testing.html https://www.sqlite.org/testing.html I think a lot of projects that claim to have 100% coverage are overselling their testing, but SQLite is in another category of thoroughness entirely.