Well, considerations like these are typical for more or less any kind of software you will ever write. Because of this all but the very simplest software needs

Well, considerations like these are typical for more or less any kind of software you will ever write. Because of this all but the very simplest software needs automated tests. But one may also note that your particular usage of CSV may be a bit simpler than supporting all of the possible complications. Especially if one is not reading CSVs that could come from anywhere. It depends, having dependencies is always a risk and a nuisance as well. The library you are using may have bugs, acquire bugs in the future, change in incompatible ways and so on.