2009-07-09 15:33:43 -06:00
|
|
|
// 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 gob
|
|
|
|
|
|
|
|
import (
|
|
|
|
"bytes";
|
2009-07-29 16:10:29 -06:00
|
|
|
"io";
|
2009-07-09 15:33:43 -06:00
|
|
|
"os";
|
|
|
|
"reflect";
|
2009-12-01 22:47:00 -07:00
|
|
|
"strings";
|
2009-07-09 15:33:43 -06:00
|
|
|
"testing";
|
|
|
|
)
|
|
|
|
|
|
|
|
type ET2 struct {
|
|
|
|
x string;
|
|
|
|
}
|
|
|
|
|
|
|
|
type ET1 struct {
|
2009-11-05 15:53:42 -07:00
|
|
|
a int;
|
|
|
|
et2 *ET2;
|
|
|
|
next *ET1;
|
2009-07-09 15:33:43 -06:00
|
|
|
}
|
|
|
|
|
2009-07-11 16:45:54 -06:00
|
|
|
// Like ET1 but with a different name for a field
|
|
|
|
type ET3 struct {
|
2009-11-05 15:53:42 -07:00
|
|
|
a int;
|
|
|
|
et2 *ET2;
|
|
|
|
differentNext *ET1;
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
// Like ET1 but with a different type for a field
|
|
|
|
type ET4 struct {
|
2009-11-05 15:53:42 -07:00
|
|
|
a int;
|
2009-11-17 00:32:30 -07:00
|
|
|
et2 float;
|
2009-11-05 15:53:42 -07:00
|
|
|
next int;
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
func TestEncoderDecoder(t *testing.T) {
|
|
|
|
b := new(bytes.Buffer);
|
|
|
|
enc := NewEncoder(b);
|
|
|
|
et1 := new(ET1);
|
|
|
|
et1.a = 7;
|
|
|
|
et1.et2 = new(ET2);
|
|
|
|
enc.Encode(et1);
|
|
|
|
if enc.state.err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error("encoder fail:", enc.state.err)
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
dec := NewDecoder(b);
|
|
|
|
newEt1 := new(ET1);
|
|
|
|
dec.Decode(newEt1);
|
|
|
|
if dec.state.err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Fatal("error decoding ET1:", dec.state.err)
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
if !reflect.DeepEqual(et1, newEt1) {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Fatalf("invalid data for et1: expected %+v; got %+v\n", *et1, *newEt1)
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
if b.Len() != 0 {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error("not at eof;", b.Len(), "bytes left")
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
enc.Encode(et1);
|
|
|
|
newEt1 = new(ET1);
|
|
|
|
dec.Decode(newEt1);
|
|
|
|
if dec.state.err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Fatal("round 2: error decoding ET1:", dec.state.err)
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
if !reflect.DeepEqual(et1, newEt1) {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Fatalf("round 2: invalid data for et1: expected %+v; got %+v\n", *et1, *newEt1)
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
if b.Len() != 0 {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error("round 2: not at eof;", b.Len(), "bytes left")
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
// Now test with a running encoder/decoder pair that we recognize a type mismatch.
|
|
|
|
enc.Encode(et1);
|
|
|
|
if enc.state.err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error("round 3: encoder fail:", enc.state.err)
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
newEt2 := new(ET2);
|
|
|
|
dec.Decode(newEt2);
|
|
|
|
if dec.state.err == nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Fatal("round 3: expected `bad type' error decoding ET2")
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Run one value through the encoder/decoder, but use the wrong type.
|
2009-07-17 12:38:31 -06:00
|
|
|
// Input is always an ET1; we compare it to whatever is under 'e'.
|
|
|
|
func badTypeCheck(e interface{}, shouldFail bool, msg string, t *testing.T) {
|
2009-07-11 16:45:54 -06:00
|
|
|
b := new(bytes.Buffer);
|
|
|
|
enc := NewEncoder(b);
|
|
|
|
et1 := new(ET1);
|
|
|
|
et1.a = 7;
|
|
|
|
et1.et2 = new(ET2);
|
|
|
|
enc.Encode(et1);
|
|
|
|
if enc.state.err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error("encoder fail:", enc.state.err)
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
dec := NewDecoder(b);
|
|
|
|
dec.Decode(e);
|
2009-07-17 12:38:31 -06:00
|
|
|
if shouldFail && (dec.state.err == nil) {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error("expected error for", msg)
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
2009-07-17 12:38:31 -06:00
|
|
|
if !shouldFail && (dec.state.err != nil) {
|
2009-11-17 00:32:30 -07:00
|
|
|
t.Error("unexpected error for", msg, dec.state.err)
|
2009-07-17 12:38:31 -06:00
|
|
|
}
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
|
|
|
|
|
|
|
// Test that we recognize a bad type the first time.
|
|
|
|
func TestWrongTypeDecoder(t *testing.T) {
|
2009-07-17 12:38:31 -06:00
|
|
|
badTypeCheck(new(ET2), true, "no fields in common", t);
|
|
|
|
badTypeCheck(new(ET3), false, "different name of field", t);
|
|
|
|
badTypeCheck(new(ET4), true, "different type of field", t);
|
2009-07-11 16:45:54 -06:00
|
|
|
}
|
2009-07-29 16:10:29 -06:00
|
|
|
|
|
|
|
func corruptDataCheck(s string, err os.Error, t *testing.T) {
|
2009-09-21 13:59:14 -06:00
|
|
|
b := bytes.NewBufferString(s);
|
2009-07-29 16:10:29 -06:00
|
|
|
dec := NewDecoder(b);
|
|
|
|
dec.Decode(new(ET2));
|
|
|
|
if dec.state.err != err {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error("expected error", err, "got", dec.state.err)
|
2009-07-29 16:10:29 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// Check that we survive bad data.
|
|
|
|
func TestBadData(t *testing.T) {
|
2009-07-29 16:24:42 -06:00
|
|
|
corruptDataCheck("", os.EOF, t);
|
2009-07-29 16:10:29 -06:00
|
|
|
corruptDataCheck("\x7Fhi", io.ErrUnexpectedEOF, t);
|
|
|
|
corruptDataCheck("\x03now is the time for all good men", errBadType, t);
|
|
|
|
}
|
2009-08-30 20:46:35 -06:00
|
|
|
|
|
|
|
// Types not supported by the Encoder (only structs work at the top level).
|
|
|
|
// Basic types work implicitly.
|
2009-11-05 15:53:42 -07:00
|
|
|
var unsupportedValues = []interface{}{
|
2009-10-11 18:37:22 -06:00
|
|
|
3,
|
|
|
|
"hi",
|
|
|
|
7.2,
|
2009-11-05 15:53:42 -07:00
|
|
|
[]int{1, 2, 3},
|
|
|
|
[3]int{1, 2, 3},
|
2009-08-30 20:46:35 -06:00
|
|
|
make(chan int),
|
|
|
|
func(a int) bool { return true },
|
2009-11-05 15:53:42 -07:00
|
|
|
make(map[string]int),
|
2009-08-30 20:46:35 -06:00
|
|
|
new(interface{}),
|
|
|
|
}
|
|
|
|
|
|
|
|
func TestUnsupported(t *testing.T) {
|
|
|
|
var b bytes.Buffer;
|
|
|
|
enc := NewEncoder(&b);
|
|
|
|
for _, v := range unsupportedValues {
|
|
|
|
err := enc.Encode(v);
|
|
|
|
if err == nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Errorf("expected error for %T; got none", v)
|
2009-08-30 20:46:35 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2009-10-11 18:37:22 -06:00
|
|
|
|
|
|
|
func encAndDec(in, out interface{}) os.Error {
|
|
|
|
b := new(bytes.Buffer);
|
|
|
|
enc := NewEncoder(b);
|
|
|
|
enc.Encode(in);
|
|
|
|
if enc.state.err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
return enc.state.err
|
2009-10-11 18:37:22 -06:00
|
|
|
}
|
|
|
|
dec := NewDecoder(b);
|
|
|
|
dec.Decode(out);
|
|
|
|
if dec.state.err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
return dec.state.err
|
2009-10-11 18:37:22 -06:00
|
|
|
}
|
|
|
|
return nil;
|
|
|
|
}
|
|
|
|
|
|
|
|
func TestTypeToPtrType(t *testing.T) {
|
|
|
|
// Encode a T, decode a *T
|
2009-11-05 15:53:42 -07:00
|
|
|
type Type0 struct {
|
|
|
|
a int;
|
|
|
|
}
|
2009-10-11 18:37:22 -06:00
|
|
|
t0 := Type0{7};
|
|
|
|
t0p := (*Type0)(nil);
|
|
|
|
if err := encAndDec(t0, t0p); err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error(err)
|
2009-10-11 18:37:22 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
func TestPtrTypeToType(t *testing.T) {
|
|
|
|
// Encode a *T, decode a T
|
2009-11-05 15:53:42 -07:00
|
|
|
type Type1 struct {
|
|
|
|
a uint;
|
|
|
|
}
|
2009-10-11 18:37:22 -06:00
|
|
|
t1p := &Type1{17};
|
|
|
|
var t1 Type1;
|
|
|
|
if err := encAndDec(t1, t1p); err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error(err)
|
2009-10-11 18:37:22 -06:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
func TestTypeToPtrPtrPtrPtrType(t *testing.T) {
|
2009-11-05 15:53:42 -07:00
|
|
|
type Type2 struct {
|
|
|
|
a ****float;
|
|
|
|
}
|
2009-10-11 18:37:22 -06:00
|
|
|
t2 := Type2{};
|
|
|
|
t2.a = new(***float);
|
|
|
|
*t2.a = new(**float);
|
|
|
|
**t2.a = new(*float);
|
|
|
|
***t2.a = new(float);
|
|
|
|
****t2.a = 27.4;
|
|
|
|
t2pppp := new(***Type2);
|
|
|
|
if err := encAndDec(t2, t2pppp); err != nil {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Error(err)
|
2009-10-11 18:37:22 -06:00
|
|
|
}
|
|
|
|
if ****(****t2pppp).a != ****t2.a {
|
2009-11-09 13:07:39 -07:00
|
|
|
t.Errorf("wrong value after decode: %g not %g", ****(****t2pppp).a, ****t2.a)
|
2009-10-11 18:37:22 -06:00
|
|
|
}
|
|
|
|
}
|
2009-12-01 16:31:28 -07:00
|
|
|
|
|
|
|
func TestSlice(t *testing.T) {
|
|
|
|
type Type3 struct {
|
|
|
|
a []string;
|
|
|
|
}
|
|
|
|
t3p := &Type3{[]string{"hello", "world"}};
|
|
|
|
var t3 Type3;
|
|
|
|
if err := encAndDec(t3, t3p); err != nil {
|
|
|
|
t.Error(err)
|
|
|
|
}
|
|
|
|
}
|
2009-12-01 22:47:00 -07:00
|
|
|
|
|
|
|
func TestValueError(t *testing.T) {
|
|
|
|
// Encode a *T, decode a T
|
|
|
|
type Type4 struct {
|
|
|
|
a int;
|
|
|
|
}
|
|
|
|
t4p := Type4{3}; // note: not a pointer, unlike the other tests.
|
|
|
|
var t4 Type4;
|
|
|
|
if err := encAndDec(t4, t4p); err == nil || strings.Index(err.String(), "pointer") <= 0 {
|
|
|
|
t.Error("expected error; got none or got wrong one")
|
|
|
|
}
|
|
|
|
}
|