Move unexported macro doctest into unit test

src/frame/mod.rs

@@ -11,7 +11,8 @@ use std::fmt;
 ///
 /// # Examples
 ///
-/// ```rust
+/// ```ignore
+/// # // We ignore this doctest because the macro is not exported.
 /// let buf: [u8; 4] = [0, 0, 0, 1];
 /// assert_eq!(1u32, unpack_octets_4!(buf, 0, u32));
 /// ```
@@ -25,6 +26,15 @@ macro_rules! unpack_octets_4 {
     };
 }
 
+#[cfg(test)]
+mod tests {
+    #[test]
+    fn test_unpack_octets_4() {
+        let buf: [u8; 4] = [0, 0, 0, 1];
+        assert_eq!(1u32, unpack_octets_4!(buf, 0, u32));
+    }
+}
+
 mod data;
 mod go_away;
 mod head;