SilverStripe\Assets\Tests\FileTest::testArchivingModifiedKeepArchivedBothPhysicalFilesWithDifferentFilenames
Assert that archiving a modified file dataObject with keep_archived_assets moves both physical files to the protected store (draft file has a different filename)
Signature
public function testArchivingModifiedKeepArchivedBothPhysicalFilesWithDifferentFilenames()