from dopt_basics import iteration


def test_symmetric_iter_1():
    l1_in = [1, 2, 3, 4, 5, 6]
    l1_out = [1, 6, 2, 5, 3, 4]

    l1_calc = list(iteration.symmetric_iter(l1_in))
    assert len(l1_in) == len(l1_calc)
    assert len(l1_out) == len(l1_calc)

    for truth, calc in zip(l1_out, l1_calc):
        assert truth == calc


def test_symmetric_iter_2():
    l1_in = [1, 2, 3, 4, 5]
    l1_out = [1, 5, 2, 4, 3]

    l1_calc = list(iteration.symmetric_iter(l1_in))
    assert len(l1_in) == len(l1_calc)
    assert len(l1_out) == len(l1_calc)

    for truth, calc in zip(l1_out, l1_calc):
        assert truth == calc