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package binaryutil
import (
"bytes"
"encoding/binary"
"reflect"
"testing"
"unsafe"
)
func TestNativeByteOrder(t *testing.T) {
// See https://stackoverflow.com/a/53286786
var natEnd binary.ByteOrder
canary := [2]byte{}
*(*uint16)(unsafe.Pointer(&canary[0])) = uint16(0xABCD)
switch canary {
case [2]byte{0xCD, 0xAB}:
natEnd = binary.LittleEndian
case [2]byte{0xAB, 0xCD}:
natEnd = binary.BigEndian
default:
t.Fatalf("unsupported \"mixed\" native endianness")
}
tests := []struct {
name string
expectedv interface{}
marshal func(v interface{}) []byte
unmarshal func(b []byte) interface{}
reference func(v interface{}, b []byte)
}{
{
name: "Uint16",
expectedv: uint16(0x1234),
marshal: func(v interface{}) []byte { return NativeEndian.PutUint16(v.(uint16)) },
unmarshal: func(b []byte) interface{} { return NativeEndian.Uint16(b) },
reference: func(v interface{}, b []byte) { natEnd.PutUint16(b, v.(uint16)) },
},
{
name: "Uint32",
expectedv: uint32(0x12345678),
marshal: func(v interface{}) []byte { return NativeEndian.PutUint32(v.(uint32)) },
unmarshal: func(b []byte) interface{} { return NativeEndian.Uint32(b) },
reference: func(v interface{}, b []byte) { natEnd.PutUint32(b, v.(uint32)) },
},
{
name: "Uint64",
expectedv: uint64(0x1234567801020304),
marshal: func(v interface{}) []byte { return NativeEndian.PutUint64(v.(uint64)) },
unmarshal: func(b []byte) interface{} { return NativeEndian.Uint64(b) },
reference: func(v interface{}, b []byte) { natEnd.PutUint64(b, v.(uint64)) },
},
}
for _, tt := range tests {
expectedb := make([]byte, reflect.TypeOf(tt.expectedv).Size())
tt.reference(tt.expectedv, expectedb)
actualb := tt.marshal(tt.expectedv)
if !bytes.Equal(actualb, expectedb) {
t.Errorf("NativeEndian.Put%s failure, expected: %#v, got: %#v", tt.name, expectedb, actualb)
}
actualv := tt.unmarshal(actualb)
if !reflect.DeepEqual(tt.expectedv, actualv) {
t.Errorf("NativeEndian.%s failure, expected: %#v, got: %#v", tt.name, tt.expectedv, actualv)
}
}
}
func TestBigEndian(t *testing.T) {
tests := []struct {
name string
expected []byte
expectedv interface{}
actual []byte
unmarshal func(b []byte) interface{}
}{
{
name: "Uint16",
expected: []byte{0x12, 0x34},
expectedv: uint16(0x1234),
actual: BigEndian.PutUint16(0x1234),
unmarshal: func(b []byte) interface{} { return BigEndian.Uint16(b) },
},
{
name: "Uint32",
expected: []byte{0x12, 0x34, 0x56, 0x78},
expectedv: uint32(0x12345678),
actual: BigEndian.PutUint32(0x12345678),
unmarshal: func(b []byte) interface{} { return BigEndian.Uint32(b) },
},
{
name: "Uint64",
expected: []byte{0x12, 0x34, 0x56, 0x78, 0x01, 0x02, 0x03, 0x04},
expectedv: uint64(0x1234567801020304),
actual: BigEndian.PutUint64(0x1234567801020304),
unmarshal: func(b []byte) interface{} { return BigEndian.Uint64(b) },
},
}
for _, tt := range tests {
if bytes.Compare(tt.actual, tt.expected) != 0 {
t.Errorf("BigEndian.Put%s failure, expected: %#v, got: %#v", tt.name, tt.expected, tt.actual)
}
if actual := tt.unmarshal(tt.actual); !reflect.DeepEqual(actual, tt.expectedv) {
t.Errorf("BigEndian.%s failure, expected: %#v, got: %#v", tt.name, tt.expectedv, actual)
}
}
}
func TestOtherTypes(t *testing.T) {
tests := []struct {
name string
expected []byte
expectedv interface{}
actual []byte
unmarshal func(b []byte) interface{}
}{
{
name: "Int32",
expected: []byte{0x78, 0x56, 0x34, 0x12},
expectedv: int32(0x12345678),
actual: PutInt32(0x12345678),
unmarshal: func(b []byte) interface{} { return Int32(b) },
},
{
name: "String",
expected: []byte{0x74, 0x65, 0x73, 0x74},
expectedv: "test",
actual: PutString("test"),
unmarshal: func(b []byte) interface{} { return String(b) },
},
}
for _, tt := range tests {
if bytes.Compare(tt.actual, tt.expected) != 0 {
t.Errorf("Put%s failure, expected: %#v, got: %#v", tt.name, tt.expected, tt.actual)
}
if actual := tt.unmarshal(tt.actual); !reflect.DeepEqual(actual, tt.expectedv) {
t.Errorf("%s failure, expected: %#v, got: %#v", tt.name, tt.expectedv, actual)
}
}
}
|
