def test_group_by_category_str(): assert helpers.group_by_category(['a', 'a', 'c', 'b']) == [0, 0, 1, 2]
def test_group_by_category_ints(): assert helpers.group_by_category([1, 1, 2, 3]) == [0, 0, 1, 2]
def test_group_by_category_str(): assert helpers.group_by_category(['a', 'a', 'c', 'b']) == [0, 0, 1, 2]
def test_group_by_category_ints(): assert helpers.group_by_category([1, 1, 2, 3]) == [0, 0, 1, 2]