in plasma-store/src/ffi/tests.rs [50:56]
fn plasma_ffi_connect_error() {
let pc: UniquePtr<ffi::PlasmaClient> = ffi::new_plasma_client();
assert_eq!(
ffi::StatusCode::IOError,
ffi::connect(pc.as_ref().unwrap(), "/dev/null", 0).code
); // -> IOError
}