Macro digest::new_mac_test

macro_rules! new_mac_test {
    ($name : ident, $test_name : expr, $mac : ty $(,) ?) => { ... };
    ($name : ident, $test_name : expr, $mac : ty, trunc_left $(,) ?) => { ... };
    ($name : ident, $test_name : expr, $mac : ty, trunc_right $(,) ?) => { ... };
    ($name : ident, $test_name : expr, $mac : ty, $trunc : expr $(,) ?) => { ... };
}

This is supported on crate features dev and mac only.

Define MAC test