Improve cim ETS member inference completion

src/System.Management.Automation/engine/parser/TypeInferenceVisitor.cs

@@ -195,7 +195,14 @@ namespace System.Management.Automation
                 // Look in the type table first.
                 if (!isStatic)
                 {
-                    var consolidatedString = new ConsolidatedString(new[] { typename.Name });
+                    // The Ciminstance type adapter adds the full typename with and without a namespace to the list of type names.
+                    // So if we see one with a full typename we need to also get the types for the short version.
+                    // For example: "CimInstance#root/standardcimv2/MSFT_NetFirewallRule" and "CimInstance#MSFT_NetFirewallRule"
+                    Match match = Regex.Match(typename.Name, "(Microsoft\\.Management\\.Infrastructure\\.CimInstance#)(.+\\/)(.+$)");
+                    
+                    ConsolidatedString consolidatedString = match.Success
+                        ? new ConsolidatedString(new[] { typename.Name, match.Groups[1].Value + match.Groups[3].Value })
+                        : new ConsolidatedString(new[] { typename.Name });
                     results.AddRange(ExecutionContext.TypeTable.GetMembers<PSMemberInfo>(consolidatedString));
                 }
 

test/powershell/Host/TabCompletion/TabCompletion.Tests.ps1

@@ -672,6 +672,11 @@ ConstructorTestClass(int i, bool b)
         $res.CompletionMatches[0].CompletionText | Should -BeExactly Cat
     }
 
+    It 'Should complete cim ETS member added by shortname' -Skip:(!$IsWindows) {
+        $res = TabExpansion2 -inputScript '(Get-NetFirewallRule).Nam'
+        $res.CompletionMatches[0].CompletionText | Should -BeExactly 'Name'
+    }
+
     It 'Should complete variable assigned with Data statement' {
         $TestString = 'data MyDataVar {"Hello"};$MyDatav'
         $res = TabExpansion2 -inputScript $TestString