[msbuild] Updating LocalizationStringTest (#9889)

Adding a test to check a specific error code to see if the strings in other locales are translated. This test will be added to the Localization wiki in Maccore accessible to the xamarin-macios team: https://github.com/xamarin/maccore/wiki/Localization

tests/msbuild/Xamarin.MacDev.Tasks.Tests/TaskTests/LocalizationStringTest.cs

@@ -1,3 +1,4 @@
+using System;
 using System.IO;
 using System.Reflection;
 using Microsoft.Build.Utilities;
@@ -5,6 +6,7 @@ using NUnit.Framework;
 using System.Globalization;
 using System.Threading;
 using System.Collections.Generic;
+using Xamarin.Localization.MSBuild;
 
 namespace Xamarin.iOS.Tasks {
 	[TestFixture]
@@ -41,5 +43,45 @@ namespace Xamarin.iOS.Tasks {
 				Thread.CurrentThread.CurrentUICulture = originalCulture;
 			}
 		}
+
+		[TestCase ("cs-CZ")]
+		[TestCase ("de-DE")]
+		[TestCase ("es-ES")]
+		[TestCase ("fr-FR")]
+		[TestCase ("it-IT")]
+		[TestCase ("ja-JP")]
+		[TestCase ("ko-KR")]
+		[TestCase ("pl-PL")]
+		[TestCase ("pt-BR")]
+		[TestCase ("ru-RU")]
+		[TestCase ("tr-TR")]
+		[TestCase ("zh-CN")]
+		[TestCase ("zh-TW")]
+		public void SpecificErrorTranslation (string culture)
+		{
+			// insert which error code you'd like to test
+			string errorCode = "E0007";
+			CultureInfo originalCulture = Thread.CurrentThread.CurrentUICulture;
+
+			try {
+				Assert.IsFalse (string.IsNullOrEmpty (errorCode), "Error code is null or empty");
+				string englishError = TranslateError ("en-US", errorCode);
+				string newCultureError = TranslateError (culture, errorCode);
+
+				Assert.AreNotEqual (englishError, newCultureError, $"\"{errorCode}\" is not translated in {culture}.");
+			} catch (NullReferenceException){
+				Assert.IsFalse (true, $"Error code \"{errorCode}\" was not found");
+			} finally {
+				Thread.CurrentThread.CurrentUICulture = originalCulture;
+			}
+		}
+
+		private string TranslateError (string culture, string errorCode)
+		{
+			CultureInfo cultureInfo = new CultureInfo (culture);
+			Thread.CurrentThread.CurrentUICulture = cultureInfo;
+			PropertyInfo propertyInfo = typeof (MSBStrings).GetProperty (errorCode);
+			return (string) propertyInfo.GetValue (null, null);
+		}
 	}
 }

tests/msbuild/Xamarin.MacDev.Tasks.Tests/Xamarin.MacDev.Tasks.Tests.csproj

@@ -24,6 +24,7 @@
     <Reference Include="Microsoft.Build.Tasks.Core" HintPath="$(MSBuildBinPath)\Microsoft.Build.Tasks.Core.dll" />
     <Reference Include="Microsoft.Build.Utilities.Core" HintPath="$(MSBuildBinPath)\Microsoft.Build.Utilities.Core.dll" />
     <Reference Include="Xamarin.iOS.Tasks" HintPath="..\..\..\msbuild\Xamarin.iOS.Tasks\bin\$(Configuration)\netstandard2.0\Xamarin.iOS.Tasks.dll" />
+    <Reference Include="Xamarin.Localization.MSBuild" HintPath="..\..\..\msbuild\Xamarin.iOS.Tasks\bin\$(Configuration)\netstandard2.0\Xamarin.Localization.MSBuild.dll" />
     <PackageReference Include="NUnit" Version="3.12.0" />
     <PackageReference Include="NUnit.ConsoleRunner" Version="3.11.1" />
     <PackageReference Include="NUnit.Extension.NUnitV2ResultWriter" Version="3.6.0" />