#[cfg (test)]
mod test {
	#[test]
	fn signing () -> anyhow::Result <()> {
		use std::fs;
		use ring::{
			signature::{
				self,
				Ed25519KeyPair,
				KeyPair,
			},
		};
		
		fs::create_dir_all ("untracked")?;
		
		let rng = ring::rand::SystemRandom::new ();
		let pkcs8_bytes = Ed25519KeyPair::generate_pkcs8 (&rng).map_err (|_| anyhow::anyhow! ("generate_pkcs8"))?;
		
		let key_pair = Ed25519KeyPair::from_pkcs8 (pkcs8_bytes.as_ref ()).map_err (|_| anyhow::anyhow! ("from_pkcs8"))?;
		
		const MESSAGE: &[u8] = b":V";
		let sig = key_pair.sign (MESSAGE);
		
		let peer_public_key_bytes = key_pair.public_key ().as_ref ();
		let peer_public_key = signature::UnparsedPublicKey::new (&signature::ED25519, peer_public_key_bytes);
		
		peer_public_key.verify (MESSAGE, sig.as_ref ()).map_err (|_| anyhow::anyhow! ("verify"))?;
		
		Ok (())
	}
}