The description says:

If the last part is the empty string this empty string must be shown in the resulting array.

if my code not allow empty elements, test fails with:

Expected: ["bdf", "hjl", "nps", "eek", ""], instead got: ["bdf", "hjl", "nps", "eek"]

if change my code to allow empty elements, the above test works, but another test fails with:

Expected: [" xscOp", "zvygqA", "ftuwud", "adaxmh", "Edqrut"], instead got: [" xscOp", "zvygqA", "ftuwud", "adaxmh", "Edqrut", ""]

what's the pattern? allow empty elements or not?

Expected: ["bdf", "hjl", "nps", "eek", ""], instead got: ["bdf", "hjl", "nps", "eek"]
Expected: [" xscOp", "zvygqA", "ftuwud", "adaxmh", "Edqrut"], instead got: [" xscOp", "zvygqA", "ftuwud", "adaxmh", "Edqrut", ""]

In the 1st case you should have 5 parts, you got 4; in the snd you should have 5 parts but you got 6.

last element empty or not?

Expected: ["bdf", "hjl", "nps", "eek", ""], instead got: ["bdf", "hjl", "nps", "eek"]
Expected: [" xscOp", "zvygqA", "ftuwud", "adaxmh", "Edqrut"], instead got: [" xscOp", "zvygqA", "ftuwud", "adaxmh", "Edqrut", ""]

thanks, description is confusing