#![cfg(feature = "dev")]
use core::convert::TryFrom;
use elliptic_curve::dev::MockCurve;
type Signature = ecdsa::Signature<MockCurve>;
type SignatureBytes = ecdsa::SignatureBytes<MockCurve>;
#[test]
fn rejects_all_zero_signature() {
let all_zero_bytes = SignatureBytes::default();
assert!(Signature::try_from(all_zero_bytes.as_ref()).is_err());
}