package wire

import (
    "bytes"
    "testing"
)

func TestMaskChangesWithSequenceAndRoundTrips(t *testing.T) {
    var sid SessionID
    for i := range sid { sid[i] = byte(i+1) }
    plain := bytes.Repeat([]byte("DragonTCP"), 100)
    a := append([]byte(nil), plain...)
    b := append([]byte(nil), plain...)
    MaskInPlace(a, sid, ModeUpload, 1, false)
    MaskInPlace(b, sid, ModeUpload, 2, false)
    if bytes.Equal(a, b) { t.Fatal("different sequences produced identical wire bytes") }
    MaskInPlace(a, sid, ModeUpload, 1, false)
    if !bytes.Equal(a, plain) { t.Fatal("mask did not round-trip") }
}

func BenchmarkMask1MiB(b *testing.B) {
    var sid SessionID
    data := make([]byte, 1024*1024)
    b.SetBytes(int64(len(data)))
    b.ResetTimer()
    for i:=0;i<b.N;i++ {
        MaskInPlace(data,sid,ModeUpload,uint64(i),false)
    }
}