def test_lengths_to_joined_positive_counts_01():

    l = [1, -1, -2, 1, -2, -1, -2, 2, 1, -3, -1, 2, -2, -1, -1]
    t = lengths_to_joined_positive_counts(l)

    assert t == [[1], [5], [11, 12, 13], [18, 19]]
def test_lengths_to_joined_positive_counts_02():

    l = [2, 3, -2, -3, 2, 3]
    t = lengths_to_joined_positive_counts(l)

    assert t == [[1, 2, 3, 4, 5], [11, 12, 13, 14, 15]]