func TestDoubleFactorialS(t *testing.T) {
p := swing.New(tcs[len(tcs)-1].n + 1)
d := new(big.Int)
answer := new(big.Int)
for _, tc := range tcs {
if _, ok := answer.SetString(tc.s, 10); !ok {
t.Error("invalid test case", tc)
continue
}
switch _ = double.DoubleFactorialS(d, p, tc.n); {
case d == nil:
t.Error("nil result. test case", tc)
case d.Cmp(answer) != 0:
t.Log("wrong answer, test case", tc)
t.Error("got", answer)
}
}
}
func BenchmarkDoubleS2e5(b *testing.B) {
var z big.Int
for i := 0; i < b.N; i++ {
double.DoubleFactorialS(&z, s, 2e5)
}
}