Xray-core/common/buf/multi_buffer_test.go

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2020-11-25 11:01:53 +00:00
package buf_test
import (
"bytes"
"crypto/rand"
"io"
"io/ioutil"
"os"
"testing"
"github.com/google/go-cmp/cmp"
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"github.com/xtls/xray-core/common"
. "github.com/xtls/xray-core/common/buf"
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)
func TestMultiBufferRead(t *testing.T) {
b1 := New()
common.Must2(b1.WriteString("ab"))
b2 := New()
common.Must2(b2.WriteString("cd"))
mb := MultiBuffer{b1, b2}
bs := make([]byte, 32)
_, nBytes := SplitBytes(mb, bs)
if nBytes != 4 {
t.Error("expect 4 bytes split, but got ", nBytes)
}
if r := cmp.Diff(bs[:nBytes], []byte("abcd")); r != "" {
t.Error(r)
}
}
func TestMultiBufferAppend(t *testing.T) {
var mb MultiBuffer
b := New()
common.Must2(b.WriteString("ab"))
mb = append(mb, b)
if mb.Len() != 2 {
t.Error("expected length 2, but got ", mb.Len())
}
}
func TestMultiBufferSliceBySizeLarge(t *testing.T) {
lb := make([]byte, 8*1024)
common.Must2(io.ReadFull(rand.Reader, lb))
mb := MergeBytes(nil, lb)
mb, mb2 := SplitSize(mb, 1024)
if mb2.Len() != 1024 {
t.Error("expect length 1024, but got ", mb2.Len())
}
if mb.Len() != 7*1024 {
t.Error("expect length 7*1024, but got ", mb.Len())
}
mb, mb3 := SplitSize(mb, 7*1024)
if mb3.Len() != 7*1024 {
t.Error("expect length 7*1024, but got", mb.Len())
}
if !mb.IsEmpty() {
t.Error("expect empty buffer, but got ", mb.Len())
}
}
func TestMultiBufferSplitFirst(t *testing.T) {
b1 := New()
b1.WriteString("b1")
b2 := New()
b2.WriteString("b2")
b3 := New()
b3.WriteString("b3")
var mb MultiBuffer
mb = append(mb, b1, b2, b3)
mb, c1 := SplitFirst(mb)
if diff := cmp.Diff(b1.String(), c1.String()); diff != "" {
t.Error(diff)
}
mb, c2 := SplitFirst(mb)
if diff := cmp.Diff(b2.String(), c2.String()); diff != "" {
t.Error(diff)
}
mb, c3 := SplitFirst(mb)
if diff := cmp.Diff(b3.String(), c3.String()); diff != "" {
t.Error(diff)
}
if !mb.IsEmpty() {
t.Error("expect empty buffer, but got ", mb.String())
}
}
func TestMultiBufferReadAllToByte(t *testing.T) {
{
lb := make([]byte, 8*1024)
common.Must2(io.ReadFull(rand.Reader, lb))
rd := bytes.NewBuffer(lb)
b, err := ReadAllToBytes(rd)
common.Must(err)
if l := len(b); l != 8*1024 {
t.Error("unexpceted length from ReadAllToBytes", l)
}
}
{
const dat = "data/test_MultiBufferReadAllToByte.dat"
f, err := os.Open(dat)
common.Must(err)
buf2, err := ReadAllToBytes(f)
common.Must(err)
f.Close()
cnt, err := ioutil.ReadFile(dat)
common.Must(err)
if d := cmp.Diff(buf2, cnt); d != "" {
t.Error("fail to read from file: ", d)
}
}
}
func TestMultiBufferCopy(t *testing.T) {
lb := make([]byte, 8*1024)
common.Must2(io.ReadFull(rand.Reader, lb))
reader := bytes.NewBuffer(lb)
mb, err := ReadFrom(reader)
common.Must(err)
lbdst := make([]byte, 8*1024)
mb.Copy(lbdst)
if d := cmp.Diff(lb, lbdst); d != "" {
t.Error("unexpceted different from MultiBufferCopy ", d)
}
}
func TestSplitFirstBytes(t *testing.T) {
a := New()
common.Must2(a.WriteString("ab"))
b := New()
common.Must2(b.WriteString("bc"))
mb := MultiBuffer{a, b}
o := make([]byte, 2)
_, cnt := SplitFirstBytes(mb, o)
if cnt != 2 {
t.Error("unexpected cnt from SplitFirstBytes ", cnt)
}
if d := cmp.Diff(string(o), "ab"); d != "" {
t.Error("unexpected splited result from SplitFirstBytes ", d)
}
}
func TestCompact(t *testing.T) {
a := New()
common.Must2(a.WriteString("ab"))
b := New()
common.Must2(b.WriteString("bc"))
mb := MultiBuffer{a, b}
cmb := Compact(mb)
if w := cmb.String(); w != "abbc" {
t.Error("unexpected Compact result ", w)
}
}
func BenchmarkSplitBytes(b *testing.B) {
var mb MultiBuffer
raw := make([]byte, Size)
b.ResetTimer()
for i := 0; i < b.N; i++ {
buffer := StackNew()
buffer.Extend(Size)
mb = append(mb, &buffer)
mb, _ = SplitBytes(mb, raw)
}
}