Split out the messages into individual files,, and add negative tests, so we can aspire towards good coverage.

src/messages/utils.rs

@@ -0,0 +1,33 @@
+#[cfg(test)]
+use quickcheck::{Arbitrary, Gen};
+
+#[cfg(test)]
+pub fn arbitrary_socks_string(g: &mut Gen) -> String {
+    loop {
+        let mut potential = String::arbitrary(g);
+
+        potential.truncate(255);
+        let bytestring = potential.as_bytes();
+
+        if bytestring.len() > 0 && bytestring.len() < 256 {
+            return potential;
+        }
+    }
+}
+
+#[doc(hidden)]
+#[macro_export]
+macro_rules! standard_roundtrip {
+    ($name: ident, $t: ty) => {
+        #[cfg(test)]
+        quickcheck! {
+            fn $name(xs: $t) -> bool {
+                let mut buffer = vec![];
+                task::block_on(xs.write(&mut buffer)).unwrap();
+                let mut cursor = Cursor::new(buffer);
+                let ys = <$t>::read(Pin::new(&mut cursor));
+                xs == task::block_on(ys).unwrap()
+            }
+        }
+    };
+}