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v/vlib/os/signal_test.v

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import os
fn former_handler(signal os.Signal) {
println('former_handler')
exit(0)
}
fn default_handler(signal os.Signal) {
println('default_handler')
exit(0)
}
fn test_signal_opt() {
os.signal_opt(.int, default_handler) or { assert false }
}
fn test_signal_opt_invalid_argument() {
// Can't register a signal on SIGKILL
if _ := os.signal_opt(.kill, default_handler) {
assert false
}
os.signal_opt(.kill, default_handler) or {
assert err.msg() == 'Invalid argument'
assert err.code() == 22
}
}
fn test_signal_opt_return_former_handler() {
func1 := os.signal_opt(.term, former_handler) or { panic('unexpected error') }
assert isnil(func1)
func2 := os.signal_opt(.term, default_handler) or { panic('unexpected error') }
assert !isnil(func2)
// this should work, but makes the CI fail because of a bug in clang -fsanitize=memory
// assert func2 == former_handler
}