Function differential_test 

pub fn differential_test<A, B, T>(
    inputs: &[(String, Vec<u8>)],
    impl_a: A,
    impl_b: B,
) -> Vec<DiffResult<T>>
where
    A: Fn(&[u8]) -> T,
    B: Fn(&[u8]) -> T,
    T: Clone + PartialEq,

Run a differential comparison between two functions over a set of byte-vector inputs.