Restore-DbaDatabase - Fix ReplaceDbNameInFile to only replace filename, not directory path (#9873)

Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>

Author: potatoqualitee

public/Format-DbaBackupInformation.ps1

@@ -186,14 +186,14 @@ function Format-DbaBackupInformation {
                         $_.PhysicalName = $FileMapping[$_.LogicalName]
                     }
                 } else {
-                    if ($ReplaceDbNameInFile -eq $true) {
-                        $_.PhysicalName = $_.PhysicalName -Replace $History.OriginalDatabase, $History.Database
-                    }
                     Write-Message -Message " 1 PhysicalName = $($_.PhysicalName) " -Level Verbose
                     $Pname = [System.Io.FileInfo]$_.PhysicalName
                     $RestoreDir = $Pname.DirectoryName
                     # Handle MacOS returning full path for BaseName
                     $baseName = $Pname.BaseName.Split($PathSep)[-1]
+                    if ($ReplaceDbNameInFile -eq $true) {
+                        $baseName = $baseName -Replace $History.OriginalDatabase, $History.Database
+                    }
                     if ($_.Type -eq 'D' -or $_.FileType -eq 'D') {
                         if ('' -ne $DataFileDirectory) {
                             $RestoreDir = $DataFileDirectory

tests/Restore-DbaDatabase.Tests.ps1

@@ -221,6 +221,24 @@ Describe $CommandName -Tag IntegrationTests {
     }
 
 
+    Context "ReplaceDbNameInFile regression test for #9656" {
+        BeforeAll {
+            $null = Get-DbaDatabase -SqlInstance $TestConfig.instance2 -ExcludeSystem -EnableException | Remove-DbaDatabase -EnableException
+        }
+
+        It "Should replace database name in file basename only, not in directory path" {
+            $scriptOutput = Restore-DbaDatabase -SqlInstance $TestConfig.instance2 -Path "$($TestConfig.appveyorlabrepo)\singlerestore\singlerestore.bak" -DatabaseName "NewDatabaseName" -ReplaceDbNameInFile -WithReplace -OutputScriptOnly
+            $scriptOutput | Should -BeLike "*NewDatabaseName*"
+            $scriptOutput | Should -Not -BeLike "*singlerestore\NewDatabaseName\*"
+        }
+
+        It "Should generate valid MOVE statements with replaced database name" {
+            $scriptOutput = Restore-DbaDatabase -SqlInstance $TestConfig.instance2 -Path "$($TestConfig.appveyorlabrepo)\singlerestore\singlerestore.bak" -DatabaseName "ReplacedDbName" -ReplaceDbNameInFile -WithReplace -OutputScriptOnly
+            $scriptOutput | Should -Match "MOVE.*ReplacedDbName"
+        }
+    }
+
+
     Context "Test restoring as other login #6992" {
         BeforeAll {
             $null = Get-DbaDatabase -SqlInstance $TestConfig.instance2 -ExcludeSystem -EnableException | Remove-DbaDatabase -EnableException