Add Language Localization Integration Test

Content.IntegrationTests/Tests/Language/LanguageLocalizationTest.cs

@@ -0,0 +1,39 @@
+using Robust.Shared.Prototypes;
+using Robust.Shared.Localization;
+using Content.Shared.Language;
+using System.Linq;
+using System.Collections.Generic;
+
+namespace Content.IntegrationTests.Tests.Traits;
+
+/// <summary>
+///    Checks if every language has a valid name, chatname, and description localization string.
+/// </summary>
+[TestFixture]
+[TestOf(typeof(LanguagePrototype))]
+public sealed class LanguageLocalizationTest
+{
+    [Test]
+    public async Task TestLanguageLocalization()
+    {
+        await using var pair = await PoolManager.GetServerClient();
+        var server = pair.Server;
+
+        var locale = server.ResolveDependency<ILocalizationManager>();
+        var proto = server.ResolveDependency<IPrototypeManager>();
+
+        await server.WaitAssertion(() =>
+        {
+            var missingStrings = new List<string>();
+
+            foreach (var langProto in proto.EnumeratePrototypes<LanguagePrototype>().OrderBy(a => a.ID))
+                foreach (var locString in new List<string> { $"language-{langProto.ID}-name", $"chat-language-{langProto.ID}-name", $"language-{langProto.ID}-description" })
+                    if (!locale.HasString(locString))
+                        missingStrings.Add($"\"{langProto.ID}\", \"{locString}\"");
+
+            Assert.That(!missingStrings.Any(), Is.True, $"The following languages are missing localization strings:\n  {string.Join("\n  ", missingStrings)}");
+        });
+
+        await pair.CleanReturnAsync();
+    }
+}