Change 'Platform.XDG_Type' and 'Platform.SelectProductNameForDirectory' back to 'public'

Add CI tests for the module path change

src/System.Management.Automation/CoreCLR/CorePsPlatform.cs

@@ -207,7 +207,7 @@ namespace System.Management.Automation
         /// <summary>
         /// X Desktop Group configuration type enum.
         /// </summary>
-        internal enum XDG_Type
+        public enum XDG_Type
         {
             /// <summary> XDG_CONFIG_HOME/powershell </summary>
             CONFIG,
@@ -226,7 +226,7 @@ namespace System.Management.Automation
         /// <summary>
         /// function for choosing directory location of PowerShell for profile loading
         /// </summary>
-        internal static string SelectProductNameForDirectory(Platform.XDG_Type dirpath)
+        public static string SelectProductNameForDirectory(Platform.XDG_Type dirpath)
         {
             //TODO: XDG_DATA_DIRS implementation as per GitHub issue #1060
 

test/powershell/enginecore/ModulePath.Tests.ps1

@@ -0,0 +1,32 @@
+Describe "Module Path Basic Tests" -tags "CI" {
+    
+    It "validate module path on windows" -Skip:(!$IsWindows) {
+        
+        $paths = $env:PSModulePath -split [System.IO.Path]::PathSeparator
+        $paths.Count | Should Be 3
+
+        $expectedUserPath = Join-Path -Path $HOME -ChildPath 'Documents\PowerShell\Modules'
+        $paths[0] | Should Be $expectedUserPath
+
+        $expectedSharedPath = Join-Path -Path $env:ProgramFiles -ChildPath 'PowerShell\Modules'
+        $paths[1] | Should Be $expectedSharedPath
+
+        $expectedSystemPath = Join-Path -Path $PSHOME -ChildPath 'Modules'
+        $paths[2] | Should Be $expectedSystemPath
+    }
+
+    It "validate module path on unix" -Skip:($IsWindows) {
+    
+        $paths = $env:PSModulePath -split [System.IO.Path]::PathSeparator
+        $paths.Count | Should Be 3
+
+        $expectedUserPath = [System.Management.Automation.Platform]::SelectProductNameForDirectory("USER_MODULES")
+        $paths[0] | Should Be $expectedUserPath
+
+        $expectedSharedPath = [System.Management.Automation.Platform]::SelectProductNameForDirectory("SHARED_MODULES")
+        $paths[1] | Should Be $expectedSharedPath
+
+        $expectedSystemPath = Join-Path -Path $PSHOME -ChildPath 'Modules'
+        $paths[2] | Should Be $expectedSystemPath
+    }
+}