New InputLanguage tests for supplemental languages that have transien…

…t LANGID values.

src/System.Windows.Forms/tests/UnitTests/System/Windows/Forms/InputLanguageTests.cs

@@ -2,8 +2,10 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
+using System.Diagnostics;
 using System.Globalization;
 using System.Reflection;
+using System.Text;
 using Xunit;
 using static Interop;
 
@@ -134,6 +136,32 @@ public void InputLanguage_InputLanguageLayoutId_Expected(int langId, int device,
  VerifyInputLanguage(language);
  }
 
+ public static IEnumerable<object[]> SupplementalInputLanguages_TestData()
+ {
+ yield return new object[] { "ff-Adlm", "00140C00", "ADLaM" };
+ yield return new object[] { "got-Goth", "000C0C00", "Gothic" };
+ yield return new object[] { "jv-Java", "00110C00", "Javanese" };
+ yield return new object[] { "nqo", "00090C00", "N’Ko" };
+ yield return new object[] { "zgh-Tfng", "0000105F", "Tifinagh (Basic)" };
+ }
+
+ [Theory]
+ [MemberData(nameof(SupplementalInputLanguages_TestData))]
+ public void InputLanguage_FromCulture_SupplementalInputLanguages_Expected(string languageTag, string layoutId, string layoutName)
+ {
+ InstallUserLanguage(languageTag);
+
+ var culture = new CultureInfo(languageTag);
+ InputLanguage language = InputLanguage.FromCulture(culture);
+ Assert.NotNull(language);
+ Assert.Equal(languageTag, language.Culture.Name);
+ Assert.Equal(layoutId, language.LayoutId);
+ Assert.Equal(layoutName, language.LayoutName);
+ VerifyInputLanguage(language);
+
+ UninstallUserLanguage(languageTag);
+ }
+
  [Theory]
  [InlineData(0x0000)]
  [InlineData(0x007f)]
@@ -162,5 +190,50 @@ private static void VerifyInputLanguage(InputLanguage language)
  Assert.NotEqual(SR.UnknownInputLanguageLayout, language.LayoutName);
  Assert.DoesNotContain('\0', language.LayoutName);
  }
+
+ private void InstallUserLanguage(string languageTag)
+ {
+ var ps1File = Path.Combine(
+ Directory.GetCurrentDirectory(),
+ $"install-language-{languageTag}.ps1");
+
+ var sb = new StringBuilder();
+ sb.AppendLine("$list = Get-WinUserLanguageList");
+ sb.AppendLine($"$list.Add(\"{languageTag}\")");
+ sb.AppendLine("Set-WinUserLanguageList $list -force");
+ File.WriteAllText(ps1File, sb.ToString());
+
+ using (var process = new Process())
+ {
+ process.StartInfo.FileName = "powershell.exe";
+ process.StartInfo.Arguments = $"-NoProfile -ExecutionPolicy ByPass -File \"{ps1File}\"";
+
+ process.Start();
+ process.WaitForExit();
+ }
+ }
+
+ private void UninstallUserLanguage(string languageTag)
+ {
+ var ps1File = Path.Combine(
+ Directory.GetCurrentDirectory(),
+ $"uninstall-language-{languageTag}.ps1");
+
+ var sb = new StringBuilder();
+ sb.AppendLine("$list = Get-WinUserLanguageList");
+ sb.AppendLine($"$item = $list | Where-Object {{$_.LanguageTag -like \"{languageTag}\"}}");
+ sb.AppendLine("$list.Remove($item)");
+ sb.AppendLine("Set-WinUserLanguageList $list -force");
+ File.WriteAllText(ps1File, sb.ToString());
+
+ using (var process = new Process())
+ {
+ process.StartInfo.FileName = "powershell.exe";
+ process.StartInfo.Arguments = $"-NoProfile -ExecutionPolicy ByPass -File \"{ps1File}\"";
+
+ process.Start();
+ process.WaitForExit();
+ }
+ }
  }
 }