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// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package binary
import (
"os"
"bytes"
"math"
"reflect"
"testing"
)
type Struct struct {
Int8 int8
Int16 int16
Int32 int32
Int64 int64
Uint8 uint8
Uint16 uint16
Uint32 uint32
Uint64 uint64
Float32 float32
Float64 float64
Complex64 complex64
Complex128 complex128
Array [4]uint8
}
type T struct {
Int int
Uint uint
Uintptr uintptr
Array [4]int
}
var s = Struct{
0x01,
0x0203,
0x04050607,
0x08090a0b0c0d0e0f,
0x10,
0x1112,
0x13141516,
0x1718191a1b1c1d1e,
math.Float32frombits(0x1f202122),
math.Float64frombits(0x232425262728292a),
complex(
math.Float32frombits(0x2b2c2d2e),
math.Float32frombits(0x2f303132),
),
complex(
math.Float64frombits(0x333435363738393a),
math.Float64frombits(0x3b3c3d3e3f404142),
),
[4]uint8{0x43, 0x44, 0x45, 0x46},
}
var big = []byte{
1,
2, 3,
4, 5, 6, 7,
8, 9, 10, 11, 12, 13, 14, 15,
16,
17, 18,
19, 20, 21, 22,
23, 24, 25, 26, 27, 28, 29, 30,
31, 32, 33, 34,
35, 36, 37, 38, 39, 40, 41, 42,
43, 44, 45, 46, 47, 48, 49, 50,
51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66,
67, 68, 69, 70,
}
var little = []byte{
1,
3, 2,
7, 6, 5, 4,
15, 14, 13, 12, 11, 10, 9, 8,
16,
18, 17,
22, 21, 20, 19,
30, 29, 28, 27, 26, 25, 24, 23,
34, 33, 32, 31,
42, 41, 40, 39, 38, 37, 36, 35,
46, 45, 44, 43, 50, 49, 48, 47,
58, 57, 56, 55, 54, 53, 52, 51, 66, 65, 64, 63, 62, 61, 60, 59,
67, 68, 69, 70,
}
var src = []byte{1, 2, 3, 4, 5, 6, 7, 8}
var res = []int32{0x01020304, 0x05060708}
func checkResult(t *testing.T, dir string, order, err os.Error, have, want interface{}) {
if err != nil {
t.Errorf("%v %v: %v", dir, order, err)
return
}
if !reflect.DeepEqual(have, want) {
t.Errorf("%v %v:\n\thave %+v\n\twant %+v", dir, order, have, want)
}
}
func testRead(t *testing.T, order ByteOrder, b []byte, s1 interface{}) {
var s2 Struct
err := Read(bytes.NewBuffer(b), order, &s2)
checkResult(t, "Read", order, err, s2, s1)
}
func testWrite(t *testing.T, order ByteOrder, b []byte, s1 interface{}) {
buf := new(bytes.Buffer)
err := Write(buf, order, s1)
checkResult(t, "Write", order, err, buf.Bytes(), b)
}
func TestBigEndianRead(t *testing.T) { testRead(t, BigEndian, big, s) }
func TestLittleEndianRead(t *testing.T) { testRead(t, LittleEndian, little, s) }
func TestBigEndianWrite(t *testing.T) { testWrite(t, BigEndian, big, s) }
func TestLittleEndianWrite(t *testing.T) { testWrite(t, LittleEndian, little, s) }
func TestBigEndianPtrWrite(t *testing.T) { testWrite(t, BigEndian, big, &s) }
func TestLittleEndianPtrWrite(t *testing.T) { testWrite(t, LittleEndian, little, &s) }
func TestReadSlice(t *testing.T) {
slice := make([]int32, 2)
err := Read(bytes.NewBuffer(src), BigEndian, slice)
checkResult(t, "ReadSlice", BigEndian, err, slice, res)
}
func TestWriteSlice(t *testing.T) {
buf := new(bytes.Buffer)
err := Write(buf, BigEndian, res)
checkResult(t, "WriteSlice", BigEndian, err, buf.Bytes(), src)
}
func TestWriteT(t *testing.T) {
buf := new(bytes.Buffer)
ts := T{}
err := Write(buf, BigEndian, ts)
if err == nil {
t.Errorf("WriteT: have nil, want non-nil")
}
tv := reflect.Indirect(reflect.NewValue(ts)).(*reflect.StructValue)
for i, n := 0, tv.NumField(); i < n; i++ {
err = Write(buf, BigEndian, tv.Field(i).Interface())
if err == nil {
t.Errorf("WriteT.%v: have nil, want non-nil", tv.Field(i).Type())
}
}
}
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