From 665be265b91bef1c5aa00de30435d8b7c20e7f27 Mon Sep 17 00:00:00 2001
From: AlexCodesApps <141887614+AlexCodesApps@users.noreply.github.com>
Date: Tue, 17 Dec 2024 15:55:37 +0100
Subject: included test and updated changelog

---
 CHANGELOG.md                 | 1 +
 test/gleam/string_test.gleam | 3 +++
 2 files changed, 4 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 90ad8d1..c1eaddb 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,6 +4,7 @@
 
 - The `compare` and `to_int` functions from the `gleam/bool` module have been
   deprecated.
+- Fixed a bug where `string.utf_codepoint` would erronously accept negative input.
 
 ## v0.46.0 - 2024-12-08
 
diff --git a/test/gleam/string_test.gleam b/test/gleam/string_test.gleam
index 8ff4f39..ffd2f9b 100644
--- a/test/gleam/string_test.gleam
+++ b/test/gleam/string_test.gleam
@@ -706,6 +706,9 @@ pub fn utf_codepoint_test() {
 
   string.utf_codepoint(55_296)
   |> should.be_error
+
+  string.utf_codepoint(-1)
+  |> should.be_error
 }
 
 pub fn bit_array_utf_codepoint_test() {
-- 
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