RE: [ft-devel] tests

[George Williams]

Back in the days when I was writing compilers, I stumbled on a testing
system (which I've never seen anyone else use) which finds lots of
parser bugs and is very easy to implement:

Take a collection of good input (programs that parse, real fonts,
whatevers).
Randomly choose one of these.
Find a random offset in that file, and randomly change a single
character.
Parse it.
If the parser crashes, save the file.
Repeat.