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|
package struc
import (
"bytes"
"encoding/binary"
"reflect"
"testing"
)
type Nested struct {
Test2 int `struc:"int8"`
}
type Example struct {
Pad []byte `struc:"[5]pad"` // 00 00 00 00 00
I8f int `struc:"int8"` // 01
I16f int `struc:"int16"` // 00 02
I32f int `struc:"int32"` // 00 00 00 03
I64f int `struc:"int64"` // 00 00 00 00 00 00 00 04
U8f int `struc:"uint8,little"` // 05
U16f int `struc:"uint16,little"` // 06 00
U32f int `struc:"uint32,little"` // 07 00 00 00
U64f int `struc:"uint64,little"` // 08 00 00 00 00 00 00 00
Boolf int `struc:"bool"` // 01
Byte4f []byte `struc:"[4]byte"` // "abcd"
I8 int8 // 09
I16 int16 // 00 0a
I32 int32 // 00 00 00 0b
I64 int64 // 00 00 00 00 00 00 00 0c
U8 uint8 `struc:"little"` // 0d
U16 uint16 `struc:"little"` // 0e 00
U32 uint32 `struc:"little"` // 0f 00 00 00
U64 uint64 `struc:"little"` // 10 00 00 00 00 00 00 00
BoolT bool // 01
BoolF bool // 00
Byte4 [4]byte // "efgh"
Float1 float32 // 41 a0 00 00
Float2 float64 // 41 35 00 00 00 00 00 00
Size int `struc:"sizeof=Str,little"` // 0a 00 00 00
Str string `struc:"[]byte"` // "ijklmnopqr"
Strb string `struc:"[4]byte"` // "stuv"
Size2 int `struc:"uint8,sizeof=Str2"` // 04
Str2 string // "1234"
Size3 int `struc:"uint8,sizeof=Bstr"` // 04
Bstr []byte // "5678"
Nested Nested // 00 00 00 01
NestedP *Nested // 00 00 00 02
TestP64 *int `struc:"int64"` // 00 00 00 05
NestedSize int `struc:"sizeof=NestedA"` // 00 00 00 02
NestedA []Nested // [00 00 00 03, 00 00 00 04]
CustomTypeSize Int3 `struc:"sizeof=CustomTypeSizeArr"` // 00 00 00 04
CustomTypeSizeArr []byte // "ABCD"
}
var five = 5
var reference = &Example{
nil,
1, 2, 3, 4, 5, 6, 7, 8, 0, []byte{'a', 'b', 'c', 'd'},
9, 10, 11, 12, 13, 14, 15, 16, true, false, [4]byte{'e', 'f', 'g', 'h'},
20, 21,
10, "ijklmnopqr", "stuv",
4, "1234",
4, []byte("5678"),
Nested{1}, &Nested{2}, &five,
6, []Nested{{3}, {4}, {5}, {6}, {7}, {8}},
Int3(4), []byte("ABCD"),
}
var referenceBytes = []byte{
0, 0, 0, 0, 0, // pad(5)
1, 0, 2, 0, 0, 0, 3, 0, 0, 0, 0, 0, 0, 0, 4, // fake int8-int64(1-4)
5, 6, 0, 7, 0, 0, 0, 8, 0, 0, 0, 0, 0, 0, 0, // fake little-endian uint8-uint64(5-8)
0, // fake bool(0)
'a', 'b', 'c', 'd', // fake [4]byte
9, 0, 10, 0, 0, 0, 11, 0, 0, 0, 0, 0, 0, 0, 12, // real int8-int64(9-12)
13, 14, 0, 15, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, // real little-endian uint8-uint64(13-16)
1, 0, // real bool(1), bool(0)
'e', 'f', 'g', 'h', // real [4]byte
65, 160, 0, 0, // real float32(20)
64, 53, 0, 0, 0, 0, 0, 0, // real float64(21)
10, 0, 0, 0, // little-endian int32(10) sizeof=Str
'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', // Str
's', 't', 'u', 'v', // fake string([4]byte)
04, '1', '2', '3', '4', // real string
04, '5', '6', '7', '8', // fake []byte(string)
1, 2, // Nested{1}, Nested{2}
0, 0, 0, 0, 0, 0, 0, 5, // &five
0, 0, 0, 6, // int32(6)
3, 4, 5, 6, 7, 8, // [Nested{3}, ...Nested{8}]
0, 0, 4, 'A', 'B', 'C', 'D', // Int3(4), []byte("ABCD")
}
func TestCodec(t *testing.T) {
var buf bytes.Buffer
if err := Pack(&buf, reference); err != nil {
t.Fatal(err)
}
out := &Example{}
if err := Unpack(&buf, out); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(reference, out) {
t.Fatal("encode/decode failed")
}
}
func TestEncode(t *testing.T) {
var buf bytes.Buffer
if err := Pack(&buf, reference); err != nil {
t.Fatal(err)
}
if !bytes.Equal(buf.Bytes(), referenceBytes) {
t.Fatal("encode failed")
}
}
func TestDecode(t *testing.T) {
buf := bytes.NewReader(referenceBytes)
out := &Example{}
if err := Unpack(buf, out); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(reference, out) {
t.Fatal("decode failed")
}
}
func TestSizeof(t *testing.T) {
size, err := Sizeof(reference)
if err != nil {
t.Fatal(err)
}
if size != len(referenceBytes) {
t.Fatal("sizeof failed")
}
}
type ExampleEndian struct {
T int `struc:"int16,big"`
}
func TestEndianSwap(t *testing.T) {
var buf bytes.Buffer
big := &ExampleEndian{1}
if err := PackWithOrder(&buf, big, binary.BigEndian); err != nil {
t.Fatal(err)
}
little := &ExampleEndian{}
if err := UnpackWithOrder(&buf, little, binary.LittleEndian); err != nil {
t.Fatal(err)
}
if little.T != 256 {
t.Fatal("big -> little conversion failed")
}
}
func TestNilValue(t *testing.T) {
var buf bytes.Buffer
if err := Pack(&buf, nil); err == nil {
t.Fatal("failed throw error for bad struct value")
}
if err := Unpack(&buf, nil); err == nil {
t.Fatal("failed throw error for bad struct value")
}
if _, err := Sizeof(nil); err == nil {
t.Fatal("failed to throw error for bad struct value")
}
}
type sliceUnderrun struct {
Str string `struc:"[10]byte"`
Arr []uint16 `struc:"[10]uint16"`
}
func TestSliceUnderrun(t *testing.T) {
var buf bytes.Buffer
v := sliceUnderrun{
Str: "foo",
Arr: []uint16{1, 2, 3},
}
if err := Pack(&buf, &v); err != nil {
t.Fatal(err)
}
}
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