free_port() hands out a port that is free when asked, not when soulfind
binds it, and soulfind exits when the port has gone. The library
harness also gave soulfind only five seconds and did not notice a child
that had died, so either read as "no soulfind server" and failed the
test. It now waits ten seconds like the CLI harness, never takes a
child that has exited as up, and retries on a fresh port; the CLI
harness gets the same retry.
A listener that takes the port first can still answer before soulfind
has got as far as binding, so the two library tests that bind listeners
outside the server gate now take it too: while a soulfind starts, no
other test in that binary binds anything.
Michel de Graaf
2a343dd4b9