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package wdclient
import (
"fmt"
"testing"
)
func TestLocationIndex(t *testing.T) {
vm := vidMap{}
// test must be failed
mustFailed := func(length int) {
_, err := vm.getLocationIndex(length)
if err == nil {
t.Errorf("length %d must be failed", length)
}
if err.Error() != fmt.Sprintf("invalid length: %d", length) {
t.Errorf("length %d must be failed. error: %v", length, err)
}
}
mustFailed(-1)
mustFailed(0)
mustOk := func(length, cursor, expect int) {
if length <= 0 {
t.Fatal("please don't do this")
}
vm.cursor = int32(cursor)
got, err := vm.getLocationIndex(length)
if err != nil {
t.Errorf("length: %d, why? %v\n", length, err)
return
}
if got != expect {
t.Errorf("cursor: %d, length: %d, expect: %d, got: %d\n", cursor, length, expect, got)
return
}
}
for i := -1; i < 100; i++ {
mustOk(7, i, (i+1)%7)
}
// when cursor reaches MaxInt64
mustOk(7, maxCursorIndex, 0)
// test with constructor
vm = newVidMap("")
length := 7
for i := 0; i < 100; i++ {
got, err := vm.getLocationIndex(length)
if err != nil {
t.Errorf("length: %d, why? %v\n", length, err)
return
}
if got != i%length {
t.Errorf("length: %d, i: %d, got: %d\n", length, i, got)
}
}
}
func BenchmarkLocationIndex(b *testing.B) {
b.SetParallelism(8)
vm := vidMap{
cursor: maxCursorIndex - 4000,
}
b.ResetTimer()
b.RunParallel(func(pb *testing.PB) {
for pb.Next() {
_, err := vm.getLocationIndex(3)
if err != nil {
b.Error(err)
}
}
})
}
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