https://github.com/akkartik/mu/blob/main/linux/401test.mu
 1 # Some helpers for Mu tests.
 2 
 3 fn check val: boolean, msg: (addr array byte) {
 4   var tmp/eax: int <- copy val
 5   check-ints-equal tmp, 1, msg
 6 }
 7 
 8 fn check-not val: boolean, msg: (addr array byte) {
 9   var tmp/eax: int <- copy val
10   check-ints-equal tmp, 0, msg
11 }