(tests) data-driven tests with macros

src/main.rs

@@ -1,3 +1,4 @@
+#![feature(concat_idents)]
 use std::net::UdpSocket;
 use std::sync::mpsc;
 use std::thread::{self, JoinHandle};

src/proto.rs

@@ -228,9 +228,19 @@ pub enum DNSParseError {
 
 #[cfg(test)]
 mod tests {
+    macro_rules! data_driven_test {
+        ($name:expr, $func:expr, $input:literal, $output:literal) => {
+            #[test]
+            fn concat_idents!($name, _test) {
+                assert_eq!($input, $output);
+            }
+        }
+    }
 
     mod from_udp_datagram {
 
+        data_driven_test!("my_macro_test", somefunc, 5, 5);
+
         mod header_length {
             use super::super::super::*;