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: mod.rs
    path of file: ./repos/phaser/phaser/vendor/getrandom/tests/common
    
    the code of the file until where you have to start completion: use super::getrandom_impl;

#[cfg(all(target_arch = "wasm32", target_os = "unknown"))]
use wasm_bindgen_test::wasm_b
    
fn test_diff() {
    let mut v1 = [0u8; 1000];
    getrandom_impl(&mut v1).unwrap();

    let mut v2 = [0u8; 1000];
    getrandom_impl(&mut v2).unwrap();

    let mut n_diff_bits = 0;
    for i in 0..v1.len() {
        n_diff_bits += (v1[i] ^ v2[i]).count_ones();
    }

    // Check at least 1 bit per byte differs. p(failure) < 1e-1000 with random input.
    assert!(n_diff_bits >= v1.len() as u32);
}