public void CleanFileName_WhenNullOrWhitespace_ReturnsEmptyString(string s)
        {
            var result = FilePathHelper.CleanFileName(s);

            Assert.Equal(result, string.Empty);
        }
        public void CleanFileName_Valid_DoesNotReturnDefault(string input, string defaultValue)
        {
            var result = FilePathHelper.CleanFileName(input, defaultValue);

            Assert.Equal(input, result);
        }