Add null host name check in WSMan (#11288)

src/Microsoft.WSMan.Management/ConfigProvider.cs

@@ -1446,6 +1446,11 @@ namespace Microsoft.WSMan.Management
 
             // Get the wsman host name to find the session object
             string host = GetHostName(path);
+            if (string.IsNullOrEmpty(host))
+            {
+                return false;
+            }
+
             string WsManURI = NormalizePath(path, host);
 
             lock (WSManHelper.AutoSession)

test/powershell/Modules/Microsoft.WSMan.Management/ConfigProvider.Tests.ps1

@@ -77,6 +77,10 @@ Describe "WSMan Config Provider" -Tag Feature,RequireAdminOnWindows {
                 }
             }
         }
+
+        It "Container check works" {
+            Test-Path wsman:\foo -PathType container | Should -BeFalse
+        }
     }
 
     Context "Get-Item tests" {