[master] 76bc57e3d vmod_std: test negative number in string argument to std.duration()

[Nils Goroll]

commit 76bc57e3d5b3b54878e263833856f11bcad193ed
Author: Nils Goroll <nils.goroll at uplex.de>
Date:   Mon Dec 22 19:29:57 2025 +0100

    vmod_std: test negative number in string argument to std.duration()

diff --git a/vmod/tests/std_b00002.vtc b/vmod/tests/std_b00002.vtc
index de5f7c4d7..e19ca6bef 100644
--- a/vmod/tests/std_b00002.vtc
+++ b/vmod/tests/std_b00002.vtc
@@ -20,6 +20,9 @@ varnish v1 -vcl+backend {
 		} else if (req.http.duration-nf) {
 			set resp.http.duration =
 			    std.duration(req.http.duration) + 1000000s;
+		} else if (req.http.duration-lit) {
+			set resp.http.duration =
+			    std.duration(req.http.duration-lit, 0.42s);
 		} else {
 			set resp.http.duration =
 			    std.duration(req.http.duration, 1s) + 1000000s;
@@ -133,6 +136,10 @@ client c1 {
 	expect resp.http.duration == 1036000.000
 	expect resp.http.bytes == 131941395845
 
+	txreq -hdr "duration-lit: -12.345s"
+	rxresp
+	expect resp.http.duration ==  -12.345
+
 	txreq -hdr "d-real: -100"
 	rxresp
 	expect resp.http.duration ==  999900.000