From 2cd2f36fe4912cb465cf5e78a055463f8a5c44a9 Mon Sep 17 00:00:00 2001
From: 854562 <44002186+854562@users.noreply.github.com>
Date: Mon, 20 Jul 2026 22:00:10 +0200
Subject: Extract truncation logic to helper and add tests

---
 .../Localization/LocalizationManagerTests.cs       | 34 ++++++++++++++++++++++
 1 file changed, 34 insertions(+)

(limited to 'tests/Jellyfin.Server.Implementations.Tests/Localization')

diff --git a/tests/Jellyfin.Server.Implementations.Tests/Localization/LocalizationManagerTests.cs b/tests/Jellyfin.Server.Implementations.Tests/Localization/LocalizationManagerTests.cs
index 3b8fe5ca60..b608d3ea49 100644
--- a/tests/Jellyfin.Server.Implementations.Tests/Localization/LocalizationManagerTests.cs
+++ b/tests/Jellyfin.Server.Implementations.Tests/Localization/LocalizationManagerTests.cs
@@ -119,6 +119,40 @@ namespace Jellyfin.Server.Implementations.Tests.Localization
             Assert.Equal(code, culture.ThreeLetterISOLanguageName);
         }
 
+        [Theory]
+        [InlineData("ell", "Greek")] // Comma truncation
+        [InlineData("nld", "Dutch")] // Semicolon truncation
+        [InlineData("ron", "Romanian")] // Semicolon truncation, multiple
+        [InlineData("eng", "English")] // No truncation
+        [InlineData("zh-CN", "Chinese (Simplified)")] // No truncation, with parentheses
+        public async Task GetLanguageDisplayName_DelimitedName_ReturnsTruncatedName(string language, string expected)
+        {
+            var localizationManager = Setup(new ServerConfiguration
+            {
+                UICulture = "en-US"
+            });
+            await localizationManager.LoadAll();
+
+            var result = localizationManager.GetLanguageDisplayName(language);
+            Assert.Equal(expected, result);
+        }
+
+        [Theory]
+        [InlineData(null)]
+        [InlineData("")]
+        [InlineData("xyz")]
+        public async Task GetLanguageDisplayName_InvalidInput_ReturnsNull(string? language)
+        {
+            var localizationManager = Setup(new ServerConfiguration
+            {
+                UICulture = "en-US"
+            });
+            await localizationManager.LoadAll();
+
+            var result = localizationManager.GetLanguageDisplayName(language!);
+            Assert.Null(result);
+        }
+
         [Fact]
         public async Task GetParentalRatings_Default_Success()
         {
-- 
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