From a7dee0bef435f2d66a5576ad524a25d573b360b2 Mon Sep 17 00:00:00 2001
From: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Date: Mon, 19 Jun 2023 23:25:48 +0200
Subject: [PATCH] jid: Test for the size of our structs

This shows how big JIDs are represented on the stack and in other
structs.
---
 jid/src/lib.rs | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/jid/src/lib.rs b/jid/src/lib.rs
index 35df53d..9d3a9e2 100644
--- a/jid/src/lib.rs
+++ b/jid/src/lib.rs
@@ -769,6 +769,28 @@ mod tests {
     use std::collections::HashMap;
     use std::str::FromStr;
 
+    macro_rules! assert_size (
+        ($t:ty, $sz:expr) => (
+            assert_eq!(::std::mem::size_of::<$t>(), $sz);
+        );
+    );
+
+    #[cfg(target_pointer_width = "32")]
+    #[test]
+    fn test_size() {
+        assert_size!(BareJid, 24);
+        assert_size!(FullJid, 36);
+        assert_size!(Jid, 36);
+    }
+
+    #[cfg(target_pointer_width = "64")]
+    #[test]
+    fn test_size() {
+        assert_size!(BareJid, 48);
+        assert_size!(FullJid, 72);
+        assert_size!(Jid, 72);
+    }
+
     #[test]
     fn can_parse_full_jids() {
         assert_eq!(