validate_pr.py inspects paths chosen by whoever opened the pull
request, and it hashed the file before deciding whether it was a
symlink. A link to /dev/zero was read until the job timed out, and a
link out of the checkout was hashed and reported as though its target
had been contributed. The shape is now settled first, and a test that
used to hang the run covers it.
The gate had no tests at all, and neither did the 3DS crypto reached
by dynamic import from validation.py: RSA PKCS#1 v1.5, AES-128-CBC and
ECDSA over GF(2^233), all written by hand. Coverage goes from 0 to 95%
on the curve, 0 to 55% on the gate, 9 to 35% on the rest. The curve
tests check against the published SEC 2 parameters rather than against
the module: the generator satisfies the curve equation and the group
order takes it to infinity.
