smoke: assert Vary: Accept-Encoding (cache-safety regression guard)

211c824e41b0038ade7a074a3737e7c20feea496 · 2026-05-13 10:28:40 -0700 · SteveStudio2

Files touched

M test/smoke.js

Diff

commit 211c824e41b0038ade7a074a3737e7c20feea496
Author: SteveStudio2 <stevestudio2@SteveStacStudio.lan>
Date:   Wed May 13 10:28:40 2026 -0700

    smoke: assert Vary: Accept-Encoding (cache-safety regression guard)
---
 test/smoke.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/test/smoke.js b/test/smoke.js
index 7c66879..d690611 100644
--- a/test/smoke.js
+++ b/test/smoke.js
@@ -173,9 +173,11 @@ function check(name, cond, hint = '') {
   check('favicon: 200',        r.status === 200);
   check('favicon: image/svg',  /image\/svg/.test(r.headers['content-type'] || ''));
 
-  // 14b. gzip negotiated
+  // 14b. gzip negotiated + Vary: Accept-Encoding (so caches/CDNs don't
+  // serve the gzipped body to clients that didn't ask for gzip)
   r = await fetch('/movies', { headers: { 'Accept-Encoding': 'gzip' } });
   check('gzip /movies',        (r.headers['content-encoding'] || '') === 'gzip');
+  check('vary Accept-Encoding',(r.headers['vary'] || '').toLowerCase().includes('accept-encoding'));
 
   // 15. /about + /privacy + /terms
   r = await fetch('/about');

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