Import-SqlDscPreferredModule: Fix checking that SQLPS is loaded (#1929

)

- `Import-SqlDscPreferredModule`
  - Now the command does not fail when checking if SQLPS is loaded into the
    session (issue #1928).

CHANGELOG.md

@@ -21,6 +21,12 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
     (tested v21.0.17099). The parameter will be ignored if SQLPS module will be
     used.
 
+### Fixed
+
+- `Import-SqlDscPreferredModule`
+  - Now the command does not fail when checking if SQLPS is loaded into the
+    session ([issue #1928](https://github.com/dsccommunity/SqlServerDsc/issues/1928)).
+
 ## [16.3.0] - 2023-04-26
 
 ### Remove

source/Public/Import-SqlDscPreferredModule.ps1

@@ -96,8 +96,12 @@ function Import-SqlDscPreferredModule
     {
         if (-not $Force.IsPresent)
         {
-            # Check if the preferred module is already loaded into the session.
-            $loadedModuleName = (Get-Module -Name $availableModuleName | Select-Object -First 1).Name
+            <#
+                Check if the preferred module is already loaded into the session.
+                If the module name is a path the leaf part must be used, which is
+                the module name.
+            #>
+            $loadedModuleName = (Get-Module -Name (Split-Path -Path $availableModuleName -Leaf) | Select-Object -First 1).Name
 
             if ($loadedModuleName)
             {