def test_1_one_two_three():
assert comma_separated(' one,two,three ') == ['one', 'two', 'three']
def test_7_():
assert comma_separated(' ') == ['']
def test_5_one_two_three():
assert comma_separated('one two three') == ['one two three']
def test_6_one_two_three():
assert comma_separated('one;two;three') == ['one;two;three']
def test_4_():
assert comma_separated(',,') == ['', '', '']