public class ApprovalWriter : ApprovalTextWriter
    {
        public ApprovalWriter(string data, [CallerFilePath] string filePath = "", string extensionWithoutDot = "txt") : base(data, extensionWithoutDot)
        {
            _filePath = filePath;
        }

        public override string GetApprovalFilename(string basename)
        {
            return GetFilename(base.GetApprovalFilename(basename));
        }

        public override string GetReceivedFilename(string basename)
        {
            return GetFilename(base.GetReceivedFilename(basename));
        }

        #region Private properties and methods

        private string GetFilename(string approvalFilename)
        {
            return $"{Path.GetDirectoryName(_filePath)}\\{InsertFileExtensionInto(Path.GetFileName(approvalFilename))}";
        }

        private static string InsertFileExtensionInto(string basename)
        {
            return new Regex("([^\\.]*)\\.(.*)").Replace(basename, "$1.cs.$2");
        }

        #endregion

        #region Fields

        private readonly string _filePath;

        #endregion
    }