39 lines
602 B
Go
39 lines
602 B
Go
|
package resize
|
||
|
|
|
||
|
|
import (
|
||
|
|
"fmt"
|
||
|
|
"math"
|
||
|
|
"testing"
|
||
|
|
)
|
||
|
|
|
||
|
|
const limit = 1e-12
|
||
|
|
|
||
|
|
func Test_SincOne(t *testing.T) {
|
||
|
|
zero := Sinc(1)
|
||
|
|
if zero >= limit {
|
||
|
|
t.Error("Sinc(1) != 0")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func Test_SincZero(t *testing.T) {
|
||
|
|
one := Sinc(0)
|
||
|
|
if math.Abs(one-1) >= limit {
|
||
|
|
t.Error("Sinc(0) != 1")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func Test_SincDotOne(t *testing.T) {
|
||
|
|
res := Sinc(0.1)
|
||
|
|
if math.Abs(res-0.983631643083466) >= limit {
|
||
|
|
t.Error("Sinc(0.1) wrong")
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
func Test_SincNearZero(t *testing.T) {
|
||
|
|
res := Sinc(0.000001)
|
||
|
|
if math.Abs(res-0.9999999999983551) >= limit {
|
||
|
|
fmt.Println(res)
|
||
|
|
t.Error("Sinc near zero not stable")
|
||
|
|
}
|
||
|
|
}
|