public void GetRelativePath_RemovesWorkingDirectory()
        {
            var pwd       = Directory.GetCurrentDirectory();
            var localDirs = new LocalDirs(pwd);
            var file      = localDirs.GetAttachmentFile(_attachment);

            var path = localDirs.GetRelativePath(file);

            path.ShouldContain($"{_s}{_attachment.Id.ToString()}{_s}");
            path.ShouldContain($"{_s}{_attachment.Filename}");

            var newFile = localDirs.GetFileFromRelativePath(path);

            newFile.FullName.ShouldBe(file.FullName);
        }