rand test

src/lib.rs

@@ -76,6 +76,14 @@ impl From<U256> for Secret {
 mod tests {
     use super::*;
 
+    #[cfg(feature = "rand")]
+    #[test]
+    fn random_secret() {
+        let secret = Secret::random();
+
+        assert_ne!(secret.0, U256::ZERO);
+    }
+
     #[test]
     fn public_key_derivation() {
         let a = Secret(U256::from_u8(3));