import csv

from testutils import assert_raises

for row in csv.reader(["one,two,three"]):
    [one, two, three] = row
    assert one == "one"
    assert two == "two"
    assert three == "three"


def f():
    iter = ["one,two,three", "four,five,six"]
    reader = csv.reader(iter)

    [one, two, three] = next(reader)
    [four, five, six] = next(reader)

    assert one == "one"
    assert two == "two"
    assert three == "three"
    assert four == "four"
    assert five == "five"
    assert six == "six"


f()


def test_delim():
    iter = ["one|two|three", "four|five|six"]
    reader = csv.reader(iter, delimiter="|")

    [one, two, three] = next(reader)
    [four, five, six] = next(reader)

    assert one == "one"
    assert two == "two"
    assert three == "three"
    assert four == "four"
    assert five == "five"
    assert six == "six"

    with assert_raises(TypeError):
        iter = ["one,,two,,three"]
        csv.reader(iter, delimiter=",,")


test_delim()