From 4b85875694fa604e87ed286d4c01af0f7350ae9d Mon Sep 17 00:00:00 2001
From: Elias Rohrer <dev@tnull.de>
Date: Tue, 7 Jan 2025 09:13:27 +0100
Subject: [PATCH] Add test vector for (invalid) mixed-case offer encoding

The spec requires the bech32 offer encodings to be all upper- or
lowercase, but disallows mixed-case encodings.

Here, we add a test vector for this.
---
 bolt12/format-string-test.json | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/bolt12/format-string-test.json b/bolt12/format-string-test.json
index 2bbd7d2..46e543b 100644
--- a/bolt12/format-string-test.json
+++ b/bolt12/format-string-test.json
@@ -29,6 +29,11 @@
 	"valid": true,
 	"string": "LNO1PQPS7SJQPGT+ YZM3QV4UXZMTSD3JJQER9WD3HY6TSW3+  5K7MSJZFPY7NZ5YQCN+\nYGRFDEJ82UM5WF5K2UCKYYPWA3EYT44H6TXTXQUQH7LZ5DJGE4AFGFJN7K4RGRKUAG0JSD+\r\n 5XVXG"
     },
+    {
+	"comment": "Mixed case is invalid",
+	"valid": false,
+	"string": "LnO1PqPs7sJqPgTyZm3qV4UxZmTsD3JjQeR9Wd3hY6TsW35k7mSjZfPy7nZ5YqCnYgRfDeJ82uM5Wf5k2uCkYyPwA3EyT44h6tXtXqUqH7Lz5dJgE4AfGfJn7k4rGrKuAg0jSd5xVxG"
+    },
     {
 	"comment": "+ must be surrounded by bech32 characters",
 	"valid": false,