def test_two_power_four(token_stack, two, four):
token_stack.push(two)
token_stack.push(four)
power = Power()
result = power.compute()
assert result == Number([6, 1])
def test_one_power_minus_one(token_stack, one, minus_one):
with pytest.raises(NegativePowerError):
token_stack.push(one)
token_stack.push(minus_one)
power = Power()
power.compute()
def test_one_power_two(token_stack, one, two):
token_stack.push(one)
token_stack.push(two)
power = Power()
result = power.compute()
assert result == Number([1])
def test_minus_one_power_five(token_stack, minus_one, five):
token_stack.push(minus_one)
token_stack.push(five)
power = Power()
result = power.compute()
assert result == Number([1], Sign.negative)
def test_minus_one_power_four(token_stack, minus_one, four):
token_stack.push(minus_one)
token_stack.push(four)
power = Power()
result = power.compute()
assert result == Number([1])
def test_four_power_zero(token_stack, zero, four):
token_stack.push(four)
token_stack.push(zero)
power = Power()
result = power.compute()
assert result == Number([1])
def test_ninety_nine_power_five(token_stack, ninety_nine, five):
token_stack.push(ninety_nine)
token_stack.push(five)
power = Power()
result = power.compute()
assert result == Number([9, 9, 4, 0, 0, 9, 9, 0, 5, 9])
def test_eight_power_four(token_stack, eight, four):
token_stack.push(eight)
token_stack.push(four)
power = Power()
result = power.compute()
assert result == Number([6, 9, 0, 4])