Fix Install PackageProvider failure because we are not running on administrator

src/Microsoft.PackageManagement/Utility/Platform/AdminPrivilege.cs

@@ -27,9 +27,13 @@ namespace Microsoft.PackageManagement.Internal.Utility.Platform {
         /// </returns>
         public static bool IsElevated {
             get {
+#if LINUX
+                return string.Equals(System.Environment.GetEnvironmentVariable("SUDO_UID"), "1000");
+#else
                 var id = WindowsIdentity.GetCurrent();
                 var principal = new WindowsPrincipal(id);
                 return principal.IsInRole(WindowsBuiltInRole.Administrator);
+#endif
             }
         }
     }

test/powershell/Modules/PackageManagement/Get-Package.Tests.ps1

@@ -27,7 +27,6 @@ Describe "Get-package" -Tags @('BVT', 'DRT'){
 
 Describe "Get-package with version parameter  - valid scenarios" -Tags @('BVT', 'DRT'){
     $destination = Join-Path $TestDrive GetPackageTests
-    $destination > C:\test.txt
 
     It "Get-package supports -AllVersions parameter" -Skip {
         $outputWithAllVersions = (Get-Package -providername Programs,Msi -AllVersions)

test/powershell/Modules/PackageManagement/Install-PackageProvider.Tests.ps1

@@ -742,38 +742,38 @@ Describe "install-packageprovider Error Cases" -Tags @('BVT', 'DRT') {
 
   It "EXPECTED:  returns an error when asking for a provider that does not exist" {
         $Error.Clear()
-        install-packageprovider -name NOT_EXISTS  -warningaction:silentlycontinue -ea silentlycontinue
+        install-packageprovider -name NOT_EXISTS -Scope CurrentUser -warningaction:silentlycontinue -ea silentlycontinue
         $ERROR[0].FullyQualifiedErrorId | should be "NoMatchFoundForProvider,Microsoft.PowerShell.PackageManagement.Cmdlets.InstallPackageProvider"
     }
  
 
    It "EXPECTED:  returns an error when asking for a provider with RequiredVersoin and MinimumVersion" {
         $Error.Clear()
-        install-packageprovider -name NOT_EXISTS -RequiredVersion 1.0 -MinimumVersion 2.0  -warningaction:silentlycontinue -ea silentlycontinue
+        install-packageprovider -name NOT_EXISTS -Scope CurrentUser -RequiredVersion 1.0 -MinimumVersion 2.0  -warningaction:silentlycontinue -ea silentlycontinue
         $ERROR[0].FullyQualifiedErrorId | should be "VersionRangeAndRequiredVersionCannotBeSpecifiedTogether,Microsoft.PowerShell.PackageManagement.Cmdlets.InstallPackageProvider"
     }
 
    It "EXPECTED:  returns an error when asking for a provider with RequiredVersoin and MaximumVersion" {
         $Error.Clear()
-        install-packageprovider -name NOT_EXISTS -RequiredVersion 1.0 -MaximumVersion 2.0  -warningaction:silentlycontinue -ea silentlycontinue
+        install-packageprovider -name NOT_EXISTS -Scope CurrentUser -RequiredVersion 1.0 -MaximumVersion 2.0  -warningaction:silentlycontinue -ea silentlycontinue
         $ERROR[0].FullyQualifiedErrorId | should be "VersionRangeAndRequiredVersionCannotBeSpecifiedTogether,Microsoft.PowerShell.PackageManagement.Cmdlets.InstallPackageProvider"
     }
 
    It "EXPECTED:  returns an error when asking for a provider with a MinimumVersion greater than MaximumVersion" {
         $Error.Clear()
-        install-packageprovider -name nuget -MaximumVersion 1.0 -MinimumVersion 2.0 -warningaction:silentlycontinue -ea silentlycontinue
+        install-packageprovider -name nuget -Scope CurrentUser -MaximumVersion 1.0 -MinimumVersion 2.0 -warningaction:silentlycontinue -ea silentlycontinue
         $ERROR[0].FullyQualifiedErrorId | should be "NoMatchFoundForProvider,Microsoft.PowerShell.PackageManagement.Cmdlets.InstallPackageProvider"
     }
 
    It "EXPECTED:  returns an error when asking for a provider with MinimumVersion that does not exist" {
         $Error.Clear()
-        install-packageprovider -name gistprovider -MinimumVersion 20.2 -warningaction:silentlycontinue -ea silentlycontinue
+        install-packageprovider -name gistprovider -MinimumVersion 20.2 -warningaction:silentlycontinue -Scope CurrentUser -ea silentlycontinue
         $ERROR[0].FullyQualifiedErrorId | should be "NoMatchFoundForProvider,Microsoft.PowerShell.PackageManagement.Cmdlets.InstallPackageProvider"
     }
 
    It "EXPECTED:  returns an error when asking for a provider with MaximumVersion that does not exist" {
         $Error.Clear()
-        install-packageprovider -name gistprovider -MaximumVersion 0.1 -warningaction:silentlycontinue -ea silentlycontinue
+        install-packageprovider -name gistprovider -Scope CurrentUser -MaximumVersion 0.1 -warningaction:silentlycontinue -ea silentlycontinue
         $ERROR[0].FullyQualifiedErrorId | should be "NoMatchFoundForProvider,Microsoft.PowerShell.PackageManagement.Cmdlets.InstallPackageProvider"
     }        
 }

test/powershell/Modules/PackageManagement/Nuget.Tests.ps1

@@ -548,7 +548,7 @@ Describe Save-Package -Tags @('BVT', 'DRT'){
 	it "EXPECTED: Saves 'Zlib' Package To Packages Directory" {
         $version = "1.2.8.8"
         $expectedPackages = @("zlib", "zlib.v120.windesktop.msvcstl.dyn.rt-dyn", "zlib.v140.windesktop.msvcstl.dyn.rt-dyn")
-        $newDestination = "$env:tmp\nugetinstallation"
+        $newDestination = Join-Path $TestDrive "nugetinstallation"
 		
         try {
             $packages = Save-Package -Name "zlib" -ProviderName $nuget -Source $source -RequiredVersion $version -ForceBootstrap -Path $destination