31 lines
760 B
Rust
31 lines
760 B
Rust
use byteorder::{BigEndian, ByteOrder};
|
|
|
|
fn main() {
|
|
// Exercise external crate, printing to stdout.
|
|
let buf = &[1,2,3,4];
|
|
let n = <BigEndian as ByteOrder>::read_u32(buf);
|
|
assert_eq!(n, 0x01020304);
|
|
println!("{:#010x}", n);
|
|
|
|
// Access program arguments, printing to stderr.
|
|
for arg in std::env::args() {
|
|
eprintln!("{}", arg);
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod test {
|
|
use rand::{Rng, SeedableRng};
|
|
|
|
// Make sure in-crate tests with dev-dependencies work
|
|
#[test]
|
|
fn rng() {
|
|
let mut rng = rand::rngs::StdRng::seed_from_u64(0xcafebeef);
|
|
let x: u32 = rng.gen();
|
|
let y: usize = rng.gen();
|
|
let z: u128 = rng.gen();
|
|
assert_ne!(x as usize, y);
|
|
assert_ne!(y as u128, z);
|
|
}
|
|
}
|