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package imaging
import (
"runtime"
"testing"
)
func testParallelN(enabled bool, n, procs int) bool {
data := make([]bool, n)
before := runtime.GOMAXPROCS(0)
runtime.GOMAXPROCS(procs)
parallel(n, func(start, end int) {
for i := start; i < end; i++ {
data[i] = true
}
})
for i := 0; i < n; i++ {
if !data[i] {
return false
}
}
runtime.GOMAXPROCS(before)
return true
}
func TestParallel(t *testing.T) {
for _, e := range []bool{true, false} {
for _, n := range []int{1, 10, 100, 1000} {
for _, p := range []int{1, 2, 4, 8, 16, 100} {
if !testParallelN(e, n, p) {
t.Errorf("test [parallel %v %d %d] failed", e, n, p)
}
}
}
}
}
func TestClamp(t *testing.T) {
td := []struct {
f float64
u uint8
}{
{0, 0},
{255, 255},
{128, 128},
{0.49, 0},
{0.50, 1},
{254.9, 255},
{254.0, 254},
{256, 255},
{2500, 255},
{-10, 0},
{127.6, 128},
}
for _, d := range td {
if clamp(d.f) != d.u {
t.Errorf("test [clamp %v %v] failed: %v", d.f, d.u, clamp(d.f))
}
}
}
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