| 1 | module math |
| 2 | |
| 3 | fn test_factorial() { |
| 4 | assert factorial(12) == 479001600 |
| 5 | assert factorial(5) == 120 |
| 6 | assert factorial(0) == 1 |
| 7 | } |
| 8 | |
| 9 | fn test_log_factorial() { |
| 10 | assert log_factorial(12) == log(479001600) |
| 11 | assert log_factorial(5) == log(120) |
| 12 | assert log_factorial(0) == log(1) |
| 13 | } |
| 14 | |
| 15 | fn test_factoriali() { |
| 16 | assert factoriali(20) == 2432902008176640000 |
| 17 | assert factoriali(1) == 1 |
| 18 | assert factoriali(2) == 2 |
| 19 | assert factoriali(0) == 1 |
| 20 | assert factoriali(-2) == 1 |
| 21 | assert factoriali(1000) == -1 |
| 22 | } |
| 23 | |