Fix test-path failure when retrieving credential provider (#526)

Author: alerickson

Tests/PSGetFindModule.Tests.ps1

@@ -613,7 +613,7 @@ Describe "Azure Artifacts Credential Provider Integration" -Tags 'BVT' {
         UnRegister-PSRepository -Name $repoName -ErrorAction SilentlyContinue -WarningAction SilentlyContinue
     }
 
-    it "Register-PackageSource using Visual Studio installed credential provider" -Skip:(!$VSinstalledCredProvider -or !$IsWindows) {
+    it "Register-PackageSource using Visual Studio installed credential provider" -Skip:(!$VSinstalledCredProvider) {
         Register-PSRepository $repoName -SourceLocation $testLocation
 
         (Get-PSRepository -Name $repoName).Name | should match $repoName

src/PowerShellGet/public/psgetfunctions/Get-CredsFromCredentialProvider.ps1

@@ -43,10 +43,10 @@ function Get-CredsFromCredentialProvider {
     }
     else {
         # Option 1b) Find User-location - The NuGet Home location - %UserProfile%/.nuget/plugins/
-        $path = "`"$env:UserProfile/.nuget/plugins/netcore/CredentialProvider.Microsoft/CredentialProvider.Microsoft.dll`"";
+        $path = "$($env:UserProfile)/.nuget/plugins/netcore/CredentialProvider.Microsoft/CredentialProvider.Microsoft.dll";
 
         if ($script:IsLinux -or $script:IsMacOS) {
-            $path = "`"$HOME/.nuget/plugins/netcore/CredentialProvider.Microsoft/CredentialProvider.Microsoft.dll`"";
+            $path = "$($HOME)/.nuget/plugins/netcore/CredentialProvider.Microsoft/CredentialProvider.Microsoft.dll";
         }
         if (Test-Path $path -PathType Leaf) {
             $credProviderPath = $path
@@ -68,7 +68,7 @@ function Get-CredsFromCredentialProvider {
             return $null
         }
 
-        $vswhereExePath = "`"$programFiles\\Microsoft Visual Studio\\Installer\\vswhere.exe`""
+        $vswhereExePath = "$($programFiles)\\Microsoft Visual Studio\\Installer\\vswhere.exe"
         if (!(Test-Path $vswhereExePath -PathType Leaf)) {
             return $null
         }