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codec_test.go
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codec_test.go
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// Copyright (c) 2019 Andy Pan
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package gnet
import (
"bytes"
"encoding/binary"
"math/rand"
"testing"
"github.com/panjf2000/gnet/pkg/errors"
)
type mockConn struct {
Conn
buf []byte
}
func (c *mockConn) Read() []byte {
return c.buf
}
func (c *mockConn) ShiftN(_ int) int { return 0 }
func TestLengthFieldBasedFrameCodecWith1(t *testing.T) {
encoderConfig := EncoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldLength: 1,
LengthAdjustment: 0,
LengthIncludesLengthFieldLength: false,
}
decoderConfig := DecoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldOffset: 0,
LengthFieldLength: 1,
LengthAdjustment: 0,
InitialBytesToStrip: 1,
}
codec := NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
sz := 256
data := make([]byte, sz)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
if _, err := codec.Encode(nil, data); err == nil {
t.Fatal("should have a error of exceeding bytes")
}
sz = 255
data = make([]byte, sz)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
out, _ := codec.Encode(nil, data)
if !bytes.Equal(out[1:], data) {
t.Fatalf("encoded data(%s) shoule be equal to the original data(%s)\n", string(out[1:]), string(data))
}
c := &mockConn{buf: out}
if res, err := codec.Decode(c); err != nil {
t.Fatalf("decode data with error: %v\n", err)
} else if !bytes.Equal(res, data) {
t.Fatalf("decoded data(%s) shoule be equal to the original data(%s)\n", string(res), string(data))
}
encoderConfig.ByteOrder = binary.LittleEndian
decoderConfig.ByteOrder = binary.LittleEndian
codec = NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
out, _ = codec.Encode(nil, data)
if !bytes.Equal(out[1:], data) {
t.Fatalf("encoded data(%s) shoule be equal to the original data(%s)\n", string(out[1:]), string(data))
}
c.buf = out
if res, err := codec.Decode(c); err != nil {
t.Fatalf("decode data with error: %v\n", err)
} else if !bytes.Equal(res, data) {
t.Fatalf("decoded data(%s) shoule be equal to original data(%s)\n", string(res), string(data))
}
}
func TestLengthFieldBasedFrameCodecWith2(t *testing.T) {
encoderConfig := EncoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldLength: 2,
LengthAdjustment: 0,
LengthIncludesLengthFieldLength: false,
}
decoderConfig := DecoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldOffset: 0,
LengthFieldLength: 2,
LengthAdjustment: 0,
InitialBytesToStrip: 2,
}
codec := NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
sz := 65536
data := make([]byte, sz)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
if _, err := codec.Encode(nil, data); err == nil {
t.Fatal("should have a error of exceeding bytes.")
}
sz = rand.Intn(10) * 1024
data = make([]byte, sz)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
out, _ := codec.Encode(nil, data)
if !bytes.Equal(out[2:], data) {
t.Fatalf("encoded data(%s) shoule be equal to the original data(%s)\n", string(out[2:]), string(data))
}
c := &mockConn{buf: out}
if res, err := codec.Decode(c); err != nil {
t.Fatalf("decode data with error: %v\n", err)
} else if !bytes.Equal(res, data) {
t.Fatalf("decoded data(%s) shoule be equal to the original data(%s)\n", string(res), string(data))
}
encoderConfig.ByteOrder = binary.LittleEndian
decoderConfig.ByteOrder = binary.LittleEndian
codec = NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
sz = rand.Intn(10) * 1024
data = make([]byte, sz)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
out, _ = codec.Encode(nil, data)
if !bytes.Equal(out[2:], data) {
t.Fatalf("encoded data(%s) shoule be equal to the original data(%s)\n", string(out[2:]), string(data))
}
c.buf = out
if res, err := codec.Decode(c); err != nil {
t.Fatalf("decode data with error: %v\n", err)
} else if !bytes.Equal(res, data) {
t.Fatalf("decoded data(%s) shoule be equal to original data(%s)\n", string(res), string(data))
}
}
func TestLengthFieldBasedFrameCodecWith3(t *testing.T) {
encoderConfig := EncoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldLength: 3,
LengthAdjustment: 0,
LengthIncludesLengthFieldLength: false,
}
decoderConfig := DecoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldOffset: 0,
LengthFieldLength: 3,
LengthAdjustment: 0,
InitialBytesToStrip: 3,
}
codec := NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
sz := 16777216
data := make([]byte, sz)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
if _, err := codec.Encode(nil, data); err == nil {
t.Fatal("should have a error of exceeding bytes.")
}
sz = rand.Intn(10) * 64 * 1024
data = make([]byte, sz)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
out, _ := codec.Encode(nil, data)
if !bytes.Equal(out[3:], data) {
t.Fatalf("encoded data(%s) shoule be equal to the original data(%s)\n", string(out[3:]), string(data))
}
c := &mockConn{buf: out}
if res, err := codec.Decode(c); err != nil {
t.Fatalf("decode data with error: %v\n", err)
} else if !bytes.Equal(res, data) {
t.Fatalf("decoded data(%s) shoule be equal to the original data(%s)\n", string(res), string(data))
}
encoderConfig.ByteOrder = binary.LittleEndian
decoderConfig.ByteOrder = binary.LittleEndian
codec = NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
sz = rand.Intn(10) * 64 * 1024
data = make([]byte, sz)
if _, err := rand.Read(data); err != nil {
panic(err)
}
out, _ = codec.Encode(nil, data)
if !bytes.Equal(out[3:], data) {
t.Fatalf("encoded data(%s) shoule be equal to the original data(%s)\n", string(out[3:]), string(data))
}
c.buf = out
if res, err := codec.Decode(c); err != nil {
t.Fatalf("decode data with error: %v\n", err)
} else if !bytes.Equal(res, data) {
t.Fatalf("decoded data(%s) shoule be equal to original data(%s)\n", string(res), string(data))
}
buf := make([]byte, 3)
rand.Read(buf)
bNum := readUint24(binary.BigEndian, buf)
p := writeUint24(binary.BigEndian, int(bNum))
if !bytes.Equal(buf, p) {
t.Fatalf("data don't match with big endian, raw data: %s, recovered data: %s\n", string(buf), string(p))
}
rand.Read(buf)
bNum = readUint24(binary.LittleEndian, buf)
p = writeUint24(binary.LittleEndian, int(bNum))
if !bytes.Equal(buf, p) {
t.Fatalf("data don't match with little endian, raw data: %s, recovered data: %s\n", string(buf), string(p))
}
}
func TestLengthFieldBasedFrameCodecWith8(t *testing.T) {
encoderConfig := EncoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldLength: 8,
LengthAdjustment: 0,
LengthIncludesLengthFieldLength: false,
}
decoderConfig := DecoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldOffset: 0,
LengthFieldLength: 8,
LengthAdjustment: 0,
InitialBytesToStrip: 8,
}
codec := NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
sz := rand.Intn(10) * 1024 * 1024
data := make([]byte, sz)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
out, _ := codec.Encode(nil, data)
if !bytes.Equal(out[8:], data) {
t.Fatalf("encoded data(%s) shoule be equal to the original data(%s)\n", string(out[8:]), string(data))
}
c := &mockConn{buf: out}
if res, err := codec.Decode(c); err != nil {
t.Fatalf("decode data with error: %v\n", err)
} else if !bytes.Equal(res, data) {
t.Fatalf("decoded data(%s) shoule be equal to the original data(%s)\n", string(res), string(data))
}
encoderConfig.ByteOrder = binary.LittleEndian
decoderConfig.ByteOrder = binary.LittleEndian
codec = NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
sz = rand.Intn(10) * 1024 * 1024
data = make([]byte, sz)
if _, err := rand.Read(data); err != nil {
panic(err)
}
out, _ = codec.Encode(nil, data)
if !bytes.Equal(out[8:], data) {
t.Fatalf("encoded data(%s) shoule be equal to the original data(%s)\n", string(out[8:]), string(data))
}
c.buf = out
if res, err := codec.Decode(c); err != nil {
t.Fatalf("decode data with error: %v\n", err)
} else if !bytes.Equal(res, data) {
t.Fatalf("decoded data(%s) shoule be equal to original data(%s)\n", string(res), string(data))
}
}
func TestFixedLengthFrameCodec_Encode(t *testing.T) {
codec := NewFixedLengthFrameCodec(8)
if data, err := codec.Encode(nil, make([]byte, 15)); data != nil || err != errors.ErrInvalidFixedLength {
t.Fatal("should have a error of invalid fixed length")
}
}
func TestLengthFieldBasedFrameCodecZeroPlayLoad(t *testing.T) {
encoderConfig := EncoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldLength: 4,
LengthAdjustment: 0,
LengthIncludesLengthFieldLength: false,
}
decoderConfig := DecoderConfig{
ByteOrder: binary.BigEndian,
LengthFieldOffset: 0,
LengthFieldLength: 4,
LengthAdjustment: 0,
InitialBytesToStrip: 4,
}
codec := NewLengthFieldBasedFrameCodec(encoderConfig, decoderConfig)
out, _ := codec.Encode(nil, nil)
if len(out[4:]) != 0 {
t.Fatalf("encoded data should be empty, but got: %s\n", string(out[4:]))
}
res, err := codec.Decode(&mockConn{buf: out})
if err != nil {
t.Fatalf("decode error with error: %v\n", err)
} else if len(res) != 0 {
t.Fatalf("decoded data should be empty, but got: %s\n", string(res[4:]))
}
}
func TestInnerBufferReadN(t *testing.T) {
var in innerBuffer
data := make([]byte, 10)
if _, err := rand.Read(data); err != nil {
t.Fatal(err)
}
in = data
if _, err := in.readN(-1); err == nil {
t.Fatal("error missing")
}
if _, err := in.readN(11); err == nil {
t.Fatal("error missing")
}
if _, err := in.readN(1); err != nil {
t.Fatal("unexpected error")
}
if len(in) != 9 {
t.Fatal("wrong length of leftover bytes")
}
}