From 963cb86265c76152376a20d2776224dd7f789188 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Fri, 9 Jul 2021 19:01:34 +0100
Subject: [PATCH] jstest: lower: implement a test

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 jstest/jst-lower.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/jstest/jst-lower.rs b/jstest/jst-lower.rs
index cf8072b2..dabaa677 100644
--- a/jstest/jst-lower.rs
+++ b/jstest/jst-lower.rs
@@ -161,6 +161,14 @@ impl Test {
     }
 
     // z coords (at least of bottom) in updates all decrease
+    {
+      for n in &new {
+        if n.bottom && n.updated {
+          assert!( n.new_z < n.old_z, "{:?}", &n );
+        }
+      }
+    }
+
     // all targets now below all non-bottom non-targets
     // xxx ^ unimplemented checks
   }
-- 
2.30.2