Add a test case for Fluent plural forms.

OpenRA.Game/Translation.cs

@@ -65,6 +65,23 @@ namespace OpenRA
 			ParseTranslations(language, translations, fileSystem, onError);
 		}
 
+		public Translation(string text, Action<ParseError> onError)
+		{
+			var parser = new LinguiniParser(text);
+			var resource = parser.Parse();
+			foreach (var error in resource.Errors)
+				onError(error);
+
+			bundle = LinguiniBuilder.Builder()
+				.CultureInfo(CultureInfo.InvariantCulture)
+				.SkipResources()
+				.SetUseIsolating(false)
+				.UseConcurrent()
+				.UncheckedBuild();
+
+			bundle.AddResourceOverriding(resource);
+		}
+
 		void ParseTranslations(string language, string[] translations, IReadOnlyFileSystem fileSystem, Action<ParseError> onError)
 		{
 			// Always load english strings to provide a fallback for missing translations.

OpenRA.Test/OpenRA.Game/FluentTest.cs

@@ -0,0 +1,37 @@
+#region Copyright & License Information
+/*
+ * Copyright (c) The OpenRA Developers and Contributors
+ * This file is part of OpenRA, which is free software. It is made
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, either version 3 of
+ * the License, or (at your option) any later version. For more
+ * information, see COPYING.
+ */
+#endregion
+
+using System;
+using NUnit.Framework;
+
+namespace OpenRA.Test
+{
+	[TestFixture]
+	public class FluentTest
+	{
+		readonly string pluralForms = @"
+label-players = {$player ->
+    [one] One player
+   *[other] {$player} players
+}
+";
+
+		[TestCase(TestName = "Fluent Plural Terms")]
+		public void TestOne()
+		{
+			var translation = new Translation(pluralForms, e => Console.WriteLine(e.Message));
+			var label = translation.GetString("label-players", Translation.Arguments("player", 1));
+			Assert.That("One player", Is.EqualTo(label));
+			label = translation.GetString("label-players", Translation.Arguments("player", 2));
+			Assert.That("2 players", Is.EqualTo(label));
+		}
+	}
+}