def test_zero_return_two():
expected = 2
actual = lucas(0)
assert actual == expected
def test_seven_return_twentynine():
expected = 29
actual = lucas(7)
assert actual == expected
def test_eight_return_eleven():
expected = 47
actual = lucas(8)
assert actual == expected
def test_six_return_eighteen():
expected = 18
actual = lucas(6)
assert actual == expected
def test_five_return_eleven():
expected = 11
actual = lucas(5)
assert actual == expected
def test_four_return_seven():
expected = 7
actual = lucas(4)
assert actual == expected
def test_three_return_four():
expected = 4
actual = lucas(3)
assert actual == expected
def test_one_return_one():
expected = 1
actual = lucas(1)
assert actual == expected