Simple testcase factorial always returns 0

In Simple.java the factorial function always return 0.

    public static int factorial(int n) {
        int m = n;
        while (n-- > 0) {
            m *= n;
        }
        return m;
    }

Since the increment is applied after the comparison, the last run of the while loop results in m*=0; The condition should be --n > 0.