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// Copyright 2016 The Gorilla WebSocket Authors. All rights reserved. Use of
// this source code is governed by a BSD-style license that can be found in the
// LICENSE file.
// !appengine
package websocket
import (
"fmt"
"testing"
)
func maskBytesByByte(key [4]byte, pos int, b []byte) int {
for i := range b {
b[i] ^= key[pos&3]
pos++
}
return pos & 3
}
func notzero(b []byte) int {
for i := range b {
if b[i] != 0 {
return i
}
}
return -1
}
func TestMaskBytes(t *testing.T) {
key := [4]byte{1, 2, 3, 4}
for size := 1; size <= 1024; size++ {
for align := 0; align < wordSize; align++ {
for pos := 0; pos < 4; pos++ {
b := make([]byte, size+align)[align:]
maskBytes(key, pos, b)
maskBytesByByte(key, pos, b)
if i := notzero(b); i >= 0 {
t.Errorf("size:%d, align:%d, pos:%d, offset:%d", size, align, pos, i)
}
}
}
}
}
func BenchmarkMaskBytes(b *testing.B) {
for _, size := range []int{2, 4, 8, 16, 32, 512, 1024} {
b.Run(fmt.Sprintf("size-%d", size), func(b *testing.B) {
for _, align := range []int{wordSize / 2} {
b.Run(fmt.Sprintf("align-%d", align), func(b *testing.B) {
for _, fn := range []struct {
name string
fn func(key [4]byte, pos int, b []byte) int
}{
{"byte", maskBytesByByte},
{"word", maskBytes},
} {
b.Run(fn.name, func(b *testing.B) {
key := newMaskKey()
data := make([]byte, size+align)[align:]
for i := 0; i < b.N; i++ {
fn.fn(key, 0, data)
}
b.SetBytes(int64(len(data)))
})
}
})
}
})
}
}