Only impl. fmt for messages in test

src/messages.rs

@@ -1,4 +1,7 @@
+#[cfg(test)]
 use hex;
+
+#[cfg(test)]
 use std::fmt;
 
 use byteorder::LittleEndian;
@@ -30,7 +33,8 @@ impl Default for Initiation {
     fn default() -> Self {
         Self {
             f_type: <U32<LittleEndian>>::new(TYPE_INITIATION as u32),
-            f_sender: <U32<LittleEndian>>::new(0),
+
+            f_sender: <U32<LittleEndian>>::ZERO,
             f_ephemeral: [0u8; SIZE_X25519_POINT],
             f_static: [0u8; SIZE_X25519_POINT],
             f_static_tag: [0u8; SIZE_TAG],
@@ -53,6 +57,7 @@ impl Initiation {
     }
 }
 
+#[cfg(test)]
 impl fmt::Debug for Initiation {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f,
@@ -119,6 +124,7 @@ impl Default for Response {
     }
 }
 
+#[cfg(test)]
 impl fmt::Debug for Response {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         write!(f,

src/noise.rs

@@ -376,8 +376,10 @@ pub fn create_response<T: Copy>(
     ))
 }
 
-pub fn consume_response<T: Copy>(device: &Device<T>, msg: &[u8]) -> Result<Output<T>, HandshakeError> {
-
+pub fn consume_response<T: Copy>(
+    device: &Device<T>,
+    msg: &[u8],
+) -> Result<Output<T>, HandshakeError> {
     // parse message
 
     let msg = Response::parse(msg)?;