Yes, fair enough. Note that I never accused anybody of not telling the truth. My point was about how useful sqlite can be as the posterchild example of a good test suite when we can't see the secret sauce. Not that it doesn't exist. I deleted the other comment because after reading yours I realised it was needlessly controversial. I think you're right in that SQLite can be considered an example of having a good test suite when looked at from a different perspective, just not from the point of it (the test suite) being open source.