def test_solution():
from solution import factorial_recursive
assert factorial_recursive(5) == 120
assert factorial_recursive(10) == 3628800
assert factorial_recursive(1) == 1
assert factorial_recursive(0) == 1
def test_solution():
import solution
assert solution.factorial_recursive(5) == 120
assert solution.factorial_recursive(10) == 3628800
def test_solution():
import solution
assert solution.factorial_recursive(4) == 24
assert solution.factorial_recursive(8) == 40320
assert solution.factorial_recursive(0) == 1