public void Should_stop_at_comma()
        {
            var input  = "12345,6789";
            var reader = input.ToPipeReader();

            var possibleSequence = PipeParser.GetNextSequence(reader);

            Assert.NotNull(possibleSequence);
            var sequence = possibleSequence.Value;

            Assert.Equal(5, sequence.Length);

            var worked = PipeParser.TryParsePositiveInteger(sequence, out var parsed);

            Assert.True(worked);
            Assert.Equal(12345, parsed);
        }