You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: lib.rs
    path of file: ./repos/solana/programs/sbf/rust/sha/src
    
    the code of the file until where you have to start completion: //! SHA Syscall test

extern crate solana_program;
use solana_program::{custom_heap_default, custom_panic_default, msg};

fn tes
    
pub extern "C" fn entrypoint(_input: *mut u8) -> u64 {
    msg!("sha");

    test_sha256_hasher();
    test_keccak256_hasher();
    test_blake3_hasher();

    0
}