From 5972e0f5be25cebcd11a0b314a3e29087e456b92 Mon Sep 17 00:00:00 2001
From: Andrei Ovcharenko <a@krot.name>
Date: Sat, 1 Aug 2026 04:52:03 +0300
Subject: [PATCH] Fix Unicode case expansion in AdjustCase

---
 src/main/java/other/AdjustCase.java     | 2 +-
 src/test/java/other/AdjustCaseTest.java | 7 +++++++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/src/main/java/other/AdjustCase.java b/src/main/java/other/AdjustCase.java
index aca4865..208b56a 100644
--- a/src/main/java/other/AdjustCase.java
+++ b/src/main/java/other/AdjustCase.java
@@ -13,7 +13,7 @@ public class AdjustCase {
     public String adjustCaseToLower(String string) {
         if (string == null || string.length() == 0) return string;
         if (string.length() == 1) return string.toUpperCase(Locale.ROOT);
-        var stringLover = string.toLowerCase(Locale.ROOT).substring(1);
+        var stringLover = string.substring(1).toLowerCase(Locale.ROOT);
         var firstChar = string.substring(0, 1).toUpperCase(Locale.ROOT);
         return firstChar + stringLover;
     }
diff --git a/src/test/java/other/AdjustCaseTest.java b/src/test/java/other/AdjustCaseTest.java
index abb8658..723d0bf 100644
--- a/src/test/java/other/AdjustCaseTest.java
+++ b/src/test/java/other/AdjustCaseTest.java
@@ -17,6 +17,13 @@
 import static other.AdjustCase.*;
 @Tag("smoke")
 public class AdjustCaseTest {
+    @Test
+    void adjustsSuffixWithoutRetainingExpandedLowercaseCharacters() {
+        other.AdjustCase adjustCase = new other.AdjustCase();
+
+        assertEquals("\u0130bc", adjustCase.adjustCaseToLower("\u0130BC"));
+    }
+
     @Test
     void smokeTestsShouldExecuteApi() {
         quality.SmokeMethodTestHarness.verify(other.AdjustCase.class);