summaryrefslogtreecommitdiffstats
path: root/src/encoding/gob/codec_test.go
diff options
context:
space:
mode:
Diffstat (limited to 'src/encoding/gob/codec_test.go')
-rw-r--r--src/encoding/gob/codec_test.go1630
1 files changed, 1630 insertions, 0 deletions
diff --git a/src/encoding/gob/codec_test.go b/src/encoding/gob/codec_test.go
new file mode 100644
index 0000000..ec56ad5
--- /dev/null
+++ b/src/encoding/gob/codec_test.go
@@ -0,0 +1,1630 @@
+// 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"
+ "errors"
+ "flag"
+ "math"
+ "math/rand"
+ "reflect"
+ "strings"
+ "testing"
+ "time"
+ "unsafe"
+)
+
+var doFuzzTests = flag.Bool("gob.fuzz", false, "run the fuzz tests, which are large and very slow")
+
+// Guarantee encoding format by comparing some encodings to hand-written values
+type EncodeT struct {
+ x uint64
+ b []byte
+}
+
+var encodeT = []EncodeT{
+ {0x00, []byte{0x00}},
+ {0x0F, []byte{0x0F}},
+ {0xFF, []byte{0xFF, 0xFF}},
+ {0xFFFF, []byte{0xFE, 0xFF, 0xFF}},
+ {0xFFFFFF, []byte{0xFD, 0xFF, 0xFF, 0xFF}},
+ {0xFFFFFFFF, []byte{0xFC, 0xFF, 0xFF, 0xFF, 0xFF}},
+ {0xFFFFFFFFFF, []byte{0xFB, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}},
+ {0xFFFFFFFFFFFF, []byte{0xFA, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}},
+ {0xFFFFFFFFFFFFFF, []byte{0xF9, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}},
+ {0xFFFFFFFFFFFFFFFF, []byte{0xF8, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF}},
+ {0x1111, []byte{0xFE, 0x11, 0x11}},
+ {0x1111111111111111, []byte{0xF8, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11, 0x11}},
+ {0x8888888888888888, []byte{0xF8, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88, 0x88}},
+ {1 << 63, []byte{0xF8, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
+}
+
+// testError is meant to be used as a deferred function to turn a panic(gobError) into a
+// plain test.Error call.
+func testError(t *testing.T) {
+ if e := recover(); e != nil {
+ t.Error(e.(gobError).err) // Will re-panic if not one of our errors, such as a runtime error.
+ }
+}
+
+func newDecBuffer(data []byte) *decBuffer {
+ return &decBuffer{
+ data: data,
+ }
+}
+
+// Test basic encode/decode routines for unsigned integers
+func TestUintCodec(t *testing.T) {
+ defer testError(t)
+ b := new(encBuffer)
+ encState := newEncoderState(b)
+ for _, tt := range encodeT {
+ b.Reset()
+ encState.encodeUint(tt.x)
+ if !bytes.Equal(tt.b, b.Bytes()) {
+ t.Errorf("encodeUint: %#x encode: expected % x got % x", tt.x, tt.b, b.Bytes())
+ }
+ }
+ for u := uint64(0); ; u = (u + 1) * 7 {
+ b.Reset()
+ encState.encodeUint(u)
+ decState := newDecodeState(newDecBuffer(b.Bytes()))
+ v := decState.decodeUint()
+ if u != v {
+ t.Errorf("Encode/Decode: sent %#x received %#x", u, v)
+ }
+ if u&(1<<63) != 0 {
+ break
+ }
+ }
+}
+
+func verifyInt(i int64, t *testing.T) {
+ defer testError(t)
+ var b = new(encBuffer)
+ encState := newEncoderState(b)
+ encState.encodeInt(i)
+ decState := newDecodeState(newDecBuffer(b.Bytes()))
+ j := decState.decodeInt()
+ if i != j {
+ t.Errorf("Encode/Decode: sent %#x received %#x", uint64(i), uint64(j))
+ }
+}
+
+// Test basic encode/decode routines for signed integers
+func TestIntCodec(t *testing.T) {
+ for u := uint64(0); ; u = (u + 1) * 7 {
+ // Do positive and negative values
+ i := int64(u)
+ verifyInt(i, t)
+ verifyInt(-i, t)
+ verifyInt(^i, t)
+ if u&(1<<63) != 0 {
+ break
+ }
+ }
+ verifyInt(-1<<63, t) // a tricky case
+}
+
+// The result of encoding a true boolean with field number 7
+var boolResult = []byte{0x07, 0x01}
+
+// The result of encoding a number 17 with field number 7
+var signedResult = []byte{0x07, 2 * 17}
+var unsignedResult = []byte{0x07, 17}
+var floatResult = []byte{0x07, 0xFE, 0x31, 0x40}
+
+// The result of encoding a number 17+19i with field number 7
+var complexResult = []byte{0x07, 0xFE, 0x31, 0x40, 0xFE, 0x33, 0x40}
+
+// The result of encoding "hello" with field number 7
+var bytesResult = []byte{0x07, 0x05, 'h', 'e', 'l', 'l', 'o'}
+
+func newDecodeState(buf *decBuffer) *decoderState {
+ d := new(decoderState)
+ d.b = buf
+ return d
+}
+
+func newEncoderState(b *encBuffer) *encoderState {
+ b.Reset()
+ state := &encoderState{enc: nil, b: b}
+ state.fieldnum = -1
+ return state
+}
+
+// Test instruction execution for encoding.
+// Do not run the machine yet; instead do individual instructions crafted by hand.
+func TestScalarEncInstructions(t *testing.T) {
+ var b = new(encBuffer)
+
+ // bool
+ {
+ var data bool = true
+ instr := &encInstr{encBool, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(boolResult, b.Bytes()) {
+ t.Errorf("bool enc instructions: expected % x got % x", boolResult, b.Bytes())
+ }
+ }
+
+ // int
+ {
+ b.Reset()
+ var data int = 17
+ instr := &encInstr{encInt, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(signedResult, b.Bytes()) {
+ t.Errorf("int enc instructions: expected % x got % x", signedResult, b.Bytes())
+ }
+ }
+
+ // uint
+ {
+ b.Reset()
+ var data uint = 17
+ instr := &encInstr{encUint, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(unsignedResult, b.Bytes()) {
+ t.Errorf("uint enc instructions: expected % x got % x", unsignedResult, b.Bytes())
+ }
+ }
+
+ // int8
+ {
+ b.Reset()
+ var data int8 = 17
+ instr := &encInstr{encInt, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(signedResult, b.Bytes()) {
+ t.Errorf("int8 enc instructions: expected % x got % x", signedResult, b.Bytes())
+ }
+ }
+
+ // uint8
+ {
+ b.Reset()
+ var data uint8 = 17
+ instr := &encInstr{encUint, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(unsignedResult, b.Bytes()) {
+ t.Errorf("uint8 enc instructions: expected % x got % x", unsignedResult, b.Bytes())
+ }
+ }
+
+ // int16
+ {
+ b.Reset()
+ var data int16 = 17
+ instr := &encInstr{encInt, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(signedResult, b.Bytes()) {
+ t.Errorf("int16 enc instructions: expected % x got % x", signedResult, b.Bytes())
+ }
+ }
+
+ // uint16
+ {
+ b.Reset()
+ var data uint16 = 17
+ instr := &encInstr{encUint, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(unsignedResult, b.Bytes()) {
+ t.Errorf("uint16 enc instructions: expected % x got % x", unsignedResult, b.Bytes())
+ }
+ }
+
+ // int32
+ {
+ b.Reset()
+ var data int32 = 17
+ instr := &encInstr{encInt, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(signedResult, b.Bytes()) {
+ t.Errorf("int32 enc instructions: expected % x got % x", signedResult, b.Bytes())
+ }
+ }
+
+ // uint32
+ {
+ b.Reset()
+ var data uint32 = 17
+ instr := &encInstr{encUint, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(unsignedResult, b.Bytes()) {
+ t.Errorf("uint32 enc instructions: expected % x got % x", unsignedResult, b.Bytes())
+ }
+ }
+
+ // int64
+ {
+ b.Reset()
+ var data int64 = 17
+ instr := &encInstr{encInt, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(signedResult, b.Bytes()) {
+ t.Errorf("int64 enc instructions: expected % x got % x", signedResult, b.Bytes())
+ }
+ }
+
+ // uint64
+ {
+ b.Reset()
+ var data uint64 = 17
+ instr := &encInstr{encUint, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(unsignedResult, b.Bytes()) {
+ t.Errorf("uint64 enc instructions: expected % x got % x", unsignedResult, b.Bytes())
+ }
+ }
+
+ // float32
+ {
+ b.Reset()
+ var data float32 = 17
+ instr := &encInstr{encFloat, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(floatResult, b.Bytes()) {
+ t.Errorf("float32 enc instructions: expected % x got % x", floatResult, b.Bytes())
+ }
+ }
+
+ // float64
+ {
+ b.Reset()
+ var data float64 = 17
+ instr := &encInstr{encFloat, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(floatResult, b.Bytes()) {
+ t.Errorf("float64 enc instructions: expected % x got % x", floatResult, b.Bytes())
+ }
+ }
+
+ // bytes == []uint8
+ {
+ b.Reset()
+ data := []byte("hello")
+ instr := &encInstr{encUint8Array, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(bytesResult, b.Bytes()) {
+ t.Errorf("bytes enc instructions: expected % x got % x", bytesResult, b.Bytes())
+ }
+ }
+
+ // string
+ {
+ b.Reset()
+ var data string = "hello"
+ instr := &encInstr{encString, 6, nil, 0}
+ state := newEncoderState(b)
+ instr.op(instr, state, reflect.ValueOf(data))
+ if !bytes.Equal(bytesResult, b.Bytes()) {
+ t.Errorf("string enc instructions: expected % x got % x", bytesResult, b.Bytes())
+ }
+ }
+}
+
+func execDec(instr *decInstr, state *decoderState, t *testing.T, value reflect.Value) {
+ defer testError(t)
+ v := int(state.decodeUint())
+ if v+state.fieldnum != 6 {
+ t.Fatalf("decoding field number %d, got %d", 6, v+state.fieldnum)
+ }
+ instr.op(instr, state, value.Elem())
+ state.fieldnum = 6
+}
+
+func newDecodeStateFromData(data []byte) *decoderState {
+ b := newDecBuffer(data)
+ state := newDecodeState(b)
+ state.fieldnum = -1
+ return state
+}
+
+// Test instruction execution for decoding.
+// Do not run the machine yet; instead do individual instructions crafted by hand.
+func TestScalarDecInstructions(t *testing.T) {
+ ovfl := errors.New("overflow")
+
+ // bool
+ {
+ var data bool
+ instr := &decInstr{decBool, 6, nil, ovfl}
+ state := newDecodeStateFromData(boolResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != true {
+ t.Errorf("bool a = %v not true", data)
+ }
+ }
+ // int
+ {
+ var data int
+ instr := &decInstr{decOpTable[reflect.Int], 6, nil, ovfl}
+ state := newDecodeStateFromData(signedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("int a = %v not 17", data)
+ }
+ }
+
+ // uint
+ {
+ var data uint
+ instr := &decInstr{decOpTable[reflect.Uint], 6, nil, ovfl}
+ state := newDecodeStateFromData(unsignedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("uint a = %v not 17", data)
+ }
+ }
+
+ // int8
+ {
+ var data int8
+ instr := &decInstr{decInt8, 6, nil, ovfl}
+ state := newDecodeStateFromData(signedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("int8 a = %v not 17", data)
+ }
+ }
+
+ // uint8
+ {
+ var data uint8
+ instr := &decInstr{decUint8, 6, nil, ovfl}
+ state := newDecodeStateFromData(unsignedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("uint8 a = %v not 17", data)
+ }
+ }
+
+ // int16
+ {
+ var data int16
+ instr := &decInstr{decInt16, 6, nil, ovfl}
+ state := newDecodeStateFromData(signedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("int16 a = %v not 17", data)
+ }
+ }
+
+ // uint16
+ {
+ var data uint16
+ instr := &decInstr{decUint16, 6, nil, ovfl}
+ state := newDecodeStateFromData(unsignedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("uint16 a = %v not 17", data)
+ }
+ }
+
+ // int32
+ {
+ var data int32
+ instr := &decInstr{decInt32, 6, nil, ovfl}
+ state := newDecodeStateFromData(signedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("int32 a = %v not 17", data)
+ }
+ }
+
+ // uint32
+ {
+ var data uint32
+ instr := &decInstr{decUint32, 6, nil, ovfl}
+ state := newDecodeStateFromData(unsignedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("uint32 a = %v not 17", data)
+ }
+ }
+
+ // uintptr
+ {
+ var data uintptr
+ instr := &decInstr{decOpTable[reflect.Uintptr], 6, nil, ovfl}
+ state := newDecodeStateFromData(unsignedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("uintptr a = %v not 17", data)
+ }
+ }
+
+ // int64
+ {
+ var data int64
+ instr := &decInstr{decInt64, 6, nil, ovfl}
+ state := newDecodeStateFromData(signedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("int64 a = %v not 17", data)
+ }
+ }
+
+ // uint64
+ {
+ var data uint64
+ instr := &decInstr{decUint64, 6, nil, ovfl}
+ state := newDecodeStateFromData(unsignedResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("uint64 a = %v not 17", data)
+ }
+ }
+
+ // float32
+ {
+ var data float32
+ instr := &decInstr{decFloat32, 6, nil, ovfl}
+ state := newDecodeStateFromData(floatResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("float32 a = %v not 17", data)
+ }
+ }
+
+ // float64
+ {
+ var data float64
+ instr := &decInstr{decFloat64, 6, nil, ovfl}
+ state := newDecodeStateFromData(floatResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17 {
+ t.Errorf("float64 a = %v not 17", data)
+ }
+ }
+
+ // complex64
+ {
+ var data complex64
+ instr := &decInstr{decOpTable[reflect.Complex64], 6, nil, ovfl}
+ state := newDecodeStateFromData(complexResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17+19i {
+ t.Errorf("complex a = %v not 17+19i", data)
+ }
+ }
+
+ // complex128
+ {
+ var data complex128
+ instr := &decInstr{decOpTable[reflect.Complex128], 6, nil, ovfl}
+ state := newDecodeStateFromData(complexResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != 17+19i {
+ t.Errorf("complex a = %v not 17+19i", data)
+ }
+ }
+
+ // bytes == []uint8
+ {
+ var data []byte
+ instr := &decInstr{decUint8Slice, 6, nil, ovfl}
+ state := newDecodeStateFromData(bytesResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if string(data) != "hello" {
+ t.Errorf(`bytes a = %q not "hello"`, string(data))
+ }
+ }
+
+ // string
+ {
+ var data string
+ instr := &decInstr{decString, 6, nil, ovfl}
+ state := newDecodeStateFromData(bytesResult)
+ execDec(instr, state, t, reflect.ValueOf(&data))
+ if data != "hello" {
+ t.Errorf(`bytes a = %q not "hello"`, data)
+ }
+ }
+}
+
+func TestEndToEnd(t *testing.T) {
+ type T2 struct {
+ T string
+ }
+ type T3 struct {
+ X float64
+ Z *int
+ }
+ type T1 struct {
+ A, B, C int
+ M map[string]*float64
+ M2 map[int]T3
+ Mstring map[string]string
+ Mintptr map[int]*int
+ Mcomp map[complex128]complex128
+ Marr map[[2]string][2]*float64
+ EmptyMap map[string]int // to check that we receive a non-nil map.
+ N *[3]float64
+ Strs *[2]string
+ Int64s *[]int64
+ RI complex64
+ S string
+ Y []byte
+ T *T2
+ }
+ pi := 3.14159
+ e := 2.71828
+ two := 2.0
+ meaning := 42
+ fingers := 5
+ s1 := "string1"
+ s2 := "string2"
+ var comp1 complex128 = complex(1.0, 1.0)
+ var comp2 complex128 = complex(1.0, 1.0)
+ var arr1 [2]string
+ arr1[0] = s1
+ arr1[1] = s2
+ var arr2 [2]string
+ arr2[0] = s2
+ arr2[1] = s1
+ var floatArr1 [2]*float64
+ floatArr1[0] = &pi
+ floatArr1[1] = &e
+ var floatArr2 [2]*float64
+ floatArr2[0] = &e
+ floatArr2[1] = &two
+ t1 := &T1{
+ A: 17,
+ B: 18,
+ C: -5,
+ M: map[string]*float64{"pi": &pi, "e": &e},
+ M2: map[int]T3{4: {X: pi, Z: &meaning}, 10: {X: e, Z: &fingers}},
+ Mstring: map[string]string{"pi": "3.14", "e": "2.71"},
+ Mintptr: map[int]*int{meaning: &fingers, fingers: &meaning},
+ Mcomp: map[complex128]complex128{comp1: comp2, comp2: comp1},
+ Marr: map[[2]string][2]*float64{arr1: floatArr1, arr2: floatArr2},
+ EmptyMap: make(map[string]int),
+ N: &[3]float64{1.5, 2.5, 3.5},
+ Strs: &[2]string{s1, s2},
+ Int64s: &[]int64{77, 89, 123412342134},
+ RI: 17 - 23i,
+ S: "Now is the time",
+ Y: []byte("hello, sailor"),
+ T: &T2{"this is T2"},
+ }
+ b := new(bytes.Buffer)
+ err := NewEncoder(b).Encode(t1)
+ if err != nil {
+ t.Error("encode:", err)
+ }
+ var _t1 T1
+ err = NewDecoder(b).Decode(&_t1)
+ if err != nil {
+ t.Fatal("decode:", err)
+ }
+ if !reflect.DeepEqual(t1, &_t1) {
+ t.Errorf("encode expected %v got %v", *t1, _t1)
+ }
+ // Be absolutely sure the received map is non-nil.
+ if t1.EmptyMap == nil {
+ t.Errorf("nil map sent")
+ }
+ if _t1.EmptyMap == nil {
+ t.Errorf("nil map received")
+ }
+}
+
+func TestOverflow(t *testing.T) {
+ type inputT struct {
+ Maxi int64
+ Mini int64
+ Maxu uint64
+ Maxf float64
+ Minf float64
+ Maxc complex128
+ Minc complex128
+ }
+ var it inputT
+ var err error
+ b := new(bytes.Buffer)
+ enc := NewEncoder(b)
+ dec := NewDecoder(b)
+
+ // int8
+ b.Reset()
+ it = inputT{
+ Maxi: math.MaxInt8 + 1,
+ }
+ type outi8 struct {
+ Maxi int8
+ Mini int8
+ }
+ var o1 outi8
+ enc.Encode(it)
+ err = dec.Decode(&o1)
+ if err == nil || err.Error() != `value for "Maxi" out of range` {
+ t.Error("wrong overflow error for int8:", err)
+ }
+ it = inputT{
+ Mini: math.MinInt8 - 1,
+ }
+ b.Reset()
+ enc.Encode(it)
+ err = dec.Decode(&o1)
+ if err == nil || err.Error() != `value for "Mini" out of range` {
+ t.Error("wrong underflow error for int8:", err)
+ }
+
+ // int16
+ b.Reset()
+ it = inputT{
+ Maxi: math.MaxInt16 + 1,
+ }
+ type outi16 struct {
+ Maxi int16
+ Mini int16
+ }
+ var o2 outi16
+ enc.Encode(it)
+ err = dec.Decode(&o2)
+ if err == nil || err.Error() != `value for "Maxi" out of range` {
+ t.Error("wrong overflow error for int16:", err)
+ }
+ it = inputT{
+ Mini: math.MinInt16 - 1,
+ }
+ b.Reset()
+ enc.Encode(it)
+ err = dec.Decode(&o2)
+ if err == nil || err.Error() != `value for "Mini" out of range` {
+ t.Error("wrong underflow error for int16:", err)
+ }
+
+ // int32
+ b.Reset()
+ it = inputT{
+ Maxi: math.MaxInt32 + 1,
+ }
+ type outi32 struct {
+ Maxi int32
+ Mini int32
+ }
+ var o3 outi32
+ enc.Encode(it)
+ err = dec.Decode(&o3)
+ if err == nil || err.Error() != `value for "Maxi" out of range` {
+ t.Error("wrong overflow error for int32:", err)
+ }
+ it = inputT{
+ Mini: math.MinInt32 - 1,
+ }
+ b.Reset()
+ enc.Encode(it)
+ err = dec.Decode(&o3)
+ if err == nil || err.Error() != `value for "Mini" out of range` {
+ t.Error("wrong underflow error for int32:", err)
+ }
+
+ // uint8
+ b.Reset()
+ it = inputT{
+ Maxu: math.MaxUint8 + 1,
+ }
+ type outu8 struct {
+ Maxu uint8
+ }
+ var o4 outu8
+ enc.Encode(it)
+ err = dec.Decode(&o4)
+ if err == nil || err.Error() != `value for "Maxu" out of range` {
+ t.Error("wrong overflow error for uint8:", err)
+ }
+
+ // uint16
+ b.Reset()
+ it = inputT{
+ Maxu: math.MaxUint16 + 1,
+ }
+ type outu16 struct {
+ Maxu uint16
+ }
+ var o5 outu16
+ enc.Encode(it)
+ err = dec.Decode(&o5)
+ if err == nil || err.Error() != `value for "Maxu" out of range` {
+ t.Error("wrong overflow error for uint16:", err)
+ }
+
+ // uint32
+ b.Reset()
+ it = inputT{
+ Maxu: math.MaxUint32 + 1,
+ }
+ type outu32 struct {
+ Maxu uint32
+ }
+ var o6 outu32
+ enc.Encode(it)
+ err = dec.Decode(&o6)
+ if err == nil || err.Error() != `value for "Maxu" out of range` {
+ t.Error("wrong overflow error for uint32:", err)
+ }
+
+ // float32
+ b.Reset()
+ it = inputT{
+ Maxf: math.MaxFloat32 * 2,
+ }
+ type outf32 struct {
+ Maxf float32
+ Minf float32
+ }
+ var o7 outf32
+ enc.Encode(it)
+ err = dec.Decode(&o7)
+ if err == nil || err.Error() != `value for "Maxf" out of range` {
+ t.Error("wrong overflow error for float32:", err)
+ }
+
+ // complex64
+ b.Reset()
+ it = inputT{
+ Maxc: complex(math.MaxFloat32*2, math.MaxFloat32*2),
+ }
+ type outc64 struct {
+ Maxc complex64
+ Minc complex64
+ }
+ var o8 outc64
+ enc.Encode(it)
+ err = dec.Decode(&o8)
+ if err == nil || err.Error() != `value for "Maxc" out of range` {
+ t.Error("wrong overflow error for complex64:", err)
+ }
+}
+
+func TestNesting(t *testing.T) {
+ type RT struct {
+ A string
+ Next *RT
+ }
+ rt := new(RT)
+ rt.A = "level1"
+ rt.Next = new(RT)
+ rt.Next.A = "level2"
+ b := new(bytes.Buffer)
+ NewEncoder(b).Encode(rt)
+ var drt RT
+ dec := NewDecoder(b)
+ err := dec.Decode(&drt)
+ if err != nil {
+ t.Fatal("decoder error:", err)
+ }
+ if drt.A != rt.A {
+ t.Errorf("nesting: encode expected %v got %v", *rt, drt)
+ }
+ if drt.Next == nil {
+ t.Errorf("nesting: recursion failed")
+ }
+ if drt.Next.A != rt.Next.A {
+ t.Errorf("nesting: encode expected %v got %v", *rt.Next, *drt.Next)
+ }
+}
+
+// These three structures have the same data with different indirections
+type T0 struct {
+ A int
+ B int
+ C int
+ D int
+}
+type T1 struct {
+ A int
+ B *int
+ C **int
+ D ***int
+}
+type T2 struct {
+ A ***int
+ B **int
+ C *int
+ D int
+}
+
+func TestAutoIndirection(t *testing.T) {
+ // First transfer t1 into t0
+ var t1 T1
+ t1.A = 17
+ t1.B = new(int)
+ *t1.B = 177
+ t1.C = new(*int)
+ *t1.C = new(int)
+ **t1.C = 1777
+ t1.D = new(**int)
+ *t1.D = new(*int)
+ **t1.D = new(int)
+ ***t1.D = 17777
+ b := new(bytes.Buffer)
+ enc := NewEncoder(b)
+ enc.Encode(t1)
+ dec := NewDecoder(b)
+ var t0 T0
+ dec.Decode(&t0)
+ if t0.A != 17 || t0.B != 177 || t0.C != 1777 || t0.D != 17777 {
+ t.Errorf("t1->t0: expected {17 177 1777 17777}; got %v", t0)
+ }
+
+ // Now transfer t2 into t0
+ var t2 T2
+ t2.D = 17777
+ t2.C = new(int)
+ *t2.C = 1777
+ t2.B = new(*int)
+ *t2.B = new(int)
+ **t2.B = 177
+ t2.A = new(**int)
+ *t2.A = new(*int)
+ **t2.A = new(int)
+ ***t2.A = 17
+ b.Reset()
+ enc.Encode(t2)
+ t0 = T0{}
+ dec.Decode(&t0)
+ if t0.A != 17 || t0.B != 177 || t0.C != 1777 || t0.D != 17777 {
+ t.Errorf("t2->t0 expected {17 177 1777 17777}; got %v", t0)
+ }
+
+ // Now transfer t0 into t1
+ t0 = T0{17, 177, 1777, 17777}
+ b.Reset()
+ enc.Encode(t0)
+ t1 = T1{}
+ dec.Decode(&t1)
+ if t1.A != 17 || *t1.B != 177 || **t1.C != 1777 || ***t1.D != 17777 {
+ t.Errorf("t0->t1 expected {17 177 1777 17777}; got {%d %d %d %d}", t1.A, *t1.B, **t1.C, ***t1.D)
+ }
+
+ // Now transfer t0 into t2
+ b.Reset()
+ enc.Encode(t0)
+ t2 = T2{}
+ dec.Decode(&t2)
+ if ***t2.A != 17 || **t2.B != 177 || *t2.C != 1777 || t2.D != 17777 {
+ t.Errorf("t0->t2 expected {17 177 1777 17777}; got {%d %d %d %d}", ***t2.A, **t2.B, *t2.C, t2.D)
+ }
+
+ // Now do t2 again but without pre-allocated pointers.
+ b.Reset()
+ enc.Encode(t0)
+ ***t2.A = 0
+ **t2.B = 0
+ *t2.C = 0
+ t2.D = 0
+ dec.Decode(&t2)
+ if ***t2.A != 17 || **t2.B != 177 || *t2.C != 1777 || t2.D != 17777 {
+ t.Errorf("t0->t2 expected {17 177 1777 17777}; got {%d %d %d %d}", ***t2.A, **t2.B, *t2.C, t2.D)
+ }
+}
+
+type RT0 struct {
+ A int
+ B string
+ C float64
+}
+type RT1 struct {
+ C float64
+ B string
+ A int
+ NotSet string
+}
+
+func TestReorderedFields(t *testing.T) {
+ var rt0 RT0
+ rt0.A = 17
+ rt0.B = "hello"
+ rt0.C = 3.14159
+ b := new(bytes.Buffer)
+ NewEncoder(b).Encode(rt0)
+ dec := NewDecoder(b)
+ var rt1 RT1
+ // Wire type is RT0, local type is RT1.
+ err := dec.Decode(&rt1)
+ if err != nil {
+ t.Fatal("decode error:", err)
+ }
+ if rt0.A != rt1.A || rt0.B != rt1.B || rt0.C != rt1.C {
+ t.Errorf("rt1->rt0: expected %v; got %v", rt0, rt1)
+ }
+}
+
+// Like an RT0 but with fields we'll ignore on the decode side.
+type IT0 struct {
+ A int64
+ B string
+ Ignore_d []int
+ Ignore_e [3]float64
+ Ignore_f bool
+ Ignore_g string
+ Ignore_h []byte
+ Ignore_i *RT1
+ Ignore_m map[string]int
+ C float64
+}
+
+func TestIgnoredFields(t *testing.T) {
+ var it0 IT0
+ it0.A = 17
+ it0.B = "hello"
+ it0.C = 3.14159
+ it0.Ignore_d = []int{1, 2, 3}
+ it0.Ignore_e[0] = 1.0
+ it0.Ignore_e[1] = 2.0
+ it0.Ignore_e[2] = 3.0
+ it0.Ignore_f = true
+ it0.Ignore_g = "pay no attention"
+ it0.Ignore_h = []byte("to the curtain")
+ it0.Ignore_i = &RT1{3.1, "hi", 7, "hello"}
+ it0.Ignore_m = map[string]int{"one": 1, "two": 2}
+
+ b := new(bytes.Buffer)
+ NewEncoder(b).Encode(it0)
+ dec := NewDecoder(b)
+ var rt1 RT1
+ // Wire type is IT0, local type is RT1.
+ err := dec.Decode(&rt1)
+ if err != nil {
+ t.Error("error: ", err)
+ }
+ if int(it0.A) != rt1.A || it0.B != rt1.B || it0.C != rt1.C {
+ t.Errorf("rt0->rt1: expected %v; got %v", it0, rt1)
+ }
+}
+
+func TestBadRecursiveType(t *testing.T) {
+ type Rec ***Rec
+ var rec Rec
+ b := new(bytes.Buffer)
+ err := NewEncoder(b).Encode(&rec)
+ if err == nil {
+ t.Error("expected error; got none")
+ } else if !strings.Contains(err.Error(), "recursive") {
+ t.Error("expected recursive type error; got", err)
+ }
+ // Can't test decode easily because we can't encode one, so we can't pass one to a Decoder.
+}
+
+type Indirect struct {
+ A ***[3]int
+ S ***[]int
+ M ****map[string]int
+}
+
+type Direct struct {
+ A [3]int
+ S []int
+ M map[string]int
+}
+
+func TestIndirectSliceMapArray(t *testing.T) {
+ // Marshal indirect, unmarshal to direct.
+ i := new(Indirect)
+ i.A = new(**[3]int)
+ *i.A = new(*[3]int)
+ **i.A = new([3]int)
+ ***i.A = [3]int{1, 2, 3}
+ i.S = new(**[]int)
+ *i.S = new(*[]int)
+ **i.S = new([]int)
+ ***i.S = []int{4, 5, 6}
+ i.M = new(***map[string]int)
+ *i.M = new(**map[string]int)
+ **i.M = new(*map[string]int)
+ ***i.M = new(map[string]int)
+ ****i.M = map[string]int{"one": 1, "two": 2, "three": 3}
+ b := new(bytes.Buffer)
+ NewEncoder(b).Encode(i)
+ dec := NewDecoder(b)
+ var d Direct
+ err := dec.Decode(&d)
+ if err != nil {
+ t.Error("error: ", err)
+ }
+ if len(d.A) != 3 || d.A[0] != 1 || d.A[1] != 2 || d.A[2] != 3 {
+ t.Errorf("indirect to direct: d.A is %v not %v", d.A, ***i.A)
+ }
+ if len(d.S) != 3 || d.S[0] != 4 || d.S[1] != 5 || d.S[2] != 6 {
+ t.Errorf("indirect to direct: d.S is %v not %v", d.S, ***i.S)
+ }
+ if len(d.M) != 3 || d.M["one"] != 1 || d.M["two"] != 2 || d.M["three"] != 3 {
+ t.Errorf("indirect to direct: d.M is %v not %v", d.M, ***i.M)
+ }
+ // Marshal direct, unmarshal to indirect.
+ d.A = [3]int{11, 22, 33}
+ d.S = []int{44, 55, 66}
+ d.M = map[string]int{"four": 4, "five": 5, "six": 6}
+ i = new(Indirect)
+ b.Reset()
+ NewEncoder(b).Encode(d)
+ dec = NewDecoder(b)
+ err = dec.Decode(&i)
+ if err != nil {
+ t.Fatal("error: ", err)
+ }
+ if len(***i.A) != 3 || (***i.A)[0] != 11 || (***i.A)[1] != 22 || (***i.A)[2] != 33 {
+ t.Errorf("direct to indirect: ***i.A is %v not %v", ***i.A, d.A)
+ }
+ if len(***i.S) != 3 || (***i.S)[0] != 44 || (***i.S)[1] != 55 || (***i.S)[2] != 66 {
+ t.Errorf("direct to indirect: ***i.S is %v not %v", ***i.S, ***i.S)
+ }
+ if len(****i.M) != 3 || (****i.M)["four"] != 4 || (****i.M)["five"] != 5 || (****i.M)["six"] != 6 {
+ t.Errorf("direct to indirect: ****i.M is %v not %v", ****i.M, d.M)
+ }
+}
+
+// An interface with several implementations
+type Squarer interface {
+ Square() int
+}
+
+type Int int
+
+func (i Int) Square() int {
+ return int(i * i)
+}
+
+type Float float64
+
+func (f Float) Square() int {
+ return int(f * f)
+}
+
+type Vector []int
+
+func (v Vector) Square() int {
+ sum := 0
+ for _, x := range v {
+ sum += x * x
+ }
+ return sum
+}
+
+type Point struct {
+ X, Y int
+}
+
+func (p Point) Square() int {
+ return p.X*p.X + p.Y*p.Y
+}
+
+// A struct with interfaces in it.
+type InterfaceItem struct {
+ I int
+ Sq1, Sq2, Sq3 Squarer
+ F float64
+ Sq []Squarer
+}
+
+// The same struct without interfaces
+type NoInterfaceItem struct {
+ I int
+ F float64
+}
+
+func TestInterface(t *testing.T) {
+ iVal := Int(3)
+ fVal := Float(5)
+ // Sending a Vector will require that the receiver define a type in the middle of
+ // receiving the value for item2.
+ vVal := Vector{1, 2, 3}
+ b := new(bytes.Buffer)
+ item1 := &InterfaceItem{1, iVal, fVal, vVal, 11.5, []Squarer{iVal, fVal, nil, vVal}}
+ // Register the types.
+ Register(Int(0))
+ Register(Float(0))
+ Register(Vector{})
+ err := NewEncoder(b).Encode(item1)
+ if err != nil {
+ t.Error("expected no encode error; got", err)
+ }
+
+ item2 := InterfaceItem{}
+ err = NewDecoder(b).Decode(&item2)
+ if err != nil {
+ t.Fatal("decode:", err)
+ }
+ if item2.I != item1.I {
+ t.Error("normal int did not decode correctly")
+ }
+ if item2.Sq1 == nil || item2.Sq1.Square() != iVal.Square() {
+ t.Error("Int did not decode correctly")
+ }
+ if item2.Sq2 == nil || item2.Sq2.Square() != fVal.Square() {
+ t.Error("Float did not decode correctly")
+ }
+ if item2.Sq3 == nil || item2.Sq3.Square() != vVal.Square() {
+ t.Error("Vector did not decode correctly")
+ }
+ if item2.F != item1.F {
+ t.Error("normal float did not decode correctly")
+ }
+ // Now check that we received a slice of Squarers correctly, including a nil element
+ if len(item1.Sq) != len(item2.Sq) {
+ t.Fatalf("[]Squarer length wrong: got %d; expected %d", len(item2.Sq), len(item1.Sq))
+ }
+ for i, v1 := range item1.Sq {
+ v2 := item2.Sq[i]
+ if v1 == nil || v2 == nil {
+ if v1 != nil || v2 != nil {
+ t.Errorf("item %d inconsistent nils", i)
+ }
+ } else if v1.Square() != v2.Square() {
+ t.Errorf("item %d inconsistent values: %v %v", i, v1, v2)
+ }
+ }
+}
+
+// A struct with all basic types, stored in interfaces.
+type BasicInterfaceItem struct {
+ Int, Int8, Int16, Int32, Int64 any
+ Uint, Uint8, Uint16, Uint32, Uint64 any
+ Float32, Float64 any
+ Complex64, Complex128 any
+ Bool any
+ String any
+ Bytes any
+}
+
+func TestInterfaceBasic(t *testing.T) {
+ b := new(bytes.Buffer)
+ item1 := &BasicInterfaceItem{
+ int(1), int8(1), int16(1), int32(1), int64(1),
+ uint(1), uint8(1), uint16(1), uint32(1), uint64(1),
+ float32(1), 1.0,
+ complex64(1i), complex128(1i),
+ true,
+ "hello",
+ []byte("sailor"),
+ }
+ err := NewEncoder(b).Encode(item1)
+ if err != nil {
+ t.Error("expected no encode error; got", err)
+ }
+
+ item2 := &BasicInterfaceItem{}
+ err = NewDecoder(b).Decode(&item2)
+ if err != nil {
+ t.Fatal("decode:", err)
+ }
+ if !reflect.DeepEqual(item1, item2) {
+ t.Errorf("encode expected %v got %v", item1, item2)
+ }
+ // Hand check a couple for correct types.
+ if v, ok := item2.Bool.(bool); !ok || !v {
+ t.Error("boolean should be true")
+ }
+ if v, ok := item2.String.(string); !ok || v != item1.String.(string) {
+ t.Errorf("string should be %v is %v", item1.String, v)
+ }
+}
+
+type String string
+
+type PtrInterfaceItem struct {
+ Str1 any // basic
+ Str2 any // derived
+}
+
+// We'll send pointers; should receive values.
+// Also check that we can register T but send *T.
+func TestInterfacePointer(t *testing.T) {
+ b := new(bytes.Buffer)
+ str1 := "howdy"
+ str2 := String("kiddo")
+ item1 := &PtrInterfaceItem{
+ &str1,
+ &str2,
+ }
+ // Register the type.
+ Register(str2)
+ err := NewEncoder(b).Encode(item1)
+ if err != nil {
+ t.Error("expected no encode error; got", err)
+ }
+
+ item2 := &PtrInterfaceItem{}
+ err = NewDecoder(b).Decode(&item2)
+ if err != nil {
+ t.Fatal("decode:", err)
+ }
+ // Hand test for correct types and values.
+ if v, ok := item2.Str1.(string); !ok || v != str1 {
+ t.Errorf("basic string failed: %q should be %q", v, str1)
+ }
+ if v, ok := item2.Str2.(String); !ok || v != str2 {
+ t.Errorf("derived type String failed: %q should be %q", v, str2)
+ }
+}
+
+func TestIgnoreInterface(t *testing.T) {
+ iVal := Int(3)
+ fVal := Float(5)
+ // Sending a Point will require that the receiver define a type in the middle of
+ // receiving the value for item2.
+ pVal := Point{2, 3}
+ b := new(bytes.Buffer)
+ item1 := &InterfaceItem{1, iVal, fVal, pVal, 11.5, nil}
+ // Register the types.
+ Register(Int(0))
+ Register(Float(0))
+ Register(Point{})
+ err := NewEncoder(b).Encode(item1)
+ if err != nil {
+ t.Error("expected no encode error; got", err)
+ }
+
+ item2 := NoInterfaceItem{}
+ err = NewDecoder(b).Decode(&item2)
+ if err != nil {
+ t.Fatal("decode:", err)
+ }
+ if item2.I != item1.I {
+ t.Error("normal int did not decode correctly")
+ }
+ if item2.F != item1.F {
+ t.Error("normal float did not decode correctly")
+ }
+}
+
+type U struct {
+ A int
+ B string
+ c float64
+ D uint
+}
+
+func TestUnexportedFields(t *testing.T) {
+ var u0 U
+ u0.A = 17
+ u0.B = "hello"
+ u0.c = 3.14159
+ u0.D = 23
+ b := new(bytes.Buffer)
+ NewEncoder(b).Encode(u0)
+ dec := NewDecoder(b)
+ var u1 U
+ u1.c = 1234.
+ err := dec.Decode(&u1)
+ if err != nil {
+ t.Fatal("decode error:", err)
+ }
+ if u0.A != u1.A || u0.B != u1.B || u0.D != u1.D {
+ t.Errorf("u1->u0: expected %v; got %v", u0, u1)
+ }
+ if u1.c != 1234. {
+ t.Error("u1.c modified")
+ }
+}
+
+var singletons = []any{
+ true,
+ 7,
+ uint(10),
+ 3.2,
+ "hello",
+ [3]int{11, 22, 33},
+ []float32{0.5, 0.25, 0.125},
+ map[string]int{"one": 1, "two": 2},
+}
+
+func TestDebugSingleton(t *testing.T) {
+ if debugFunc == nil {
+ return
+ }
+ b := new(bytes.Buffer)
+ // Accumulate a number of values and print them out all at once.
+ for _, x := range singletons {
+ err := NewEncoder(b).Encode(x)
+ if err != nil {
+ t.Fatal("encode:", err)
+ }
+ }
+ debugFunc(b)
+}
+
+// A type that won't be defined in the gob until we send it in an interface value.
+type OnTheFly struct {
+ A int
+}
+
+type DT struct {
+ // X OnTheFly
+ A int
+ B string
+ C float64
+ I any
+ J any
+ I_nil any
+ M map[string]int
+ T [3]int
+ S []string
+}
+
+func newDT() DT {
+ var dt DT
+ dt.A = 17
+ dt.B = "hello"
+ dt.C = 3.14159
+ dt.I = 271828
+ dt.J = OnTheFly{3}
+ dt.I_nil = nil
+ dt.M = map[string]int{"one": 1, "two": 2}
+ dt.T = [3]int{11, 22, 33}
+ dt.S = []string{"hi", "joe"}
+ return dt
+}
+
+func TestDebugStruct(t *testing.T) {
+ if debugFunc == nil {
+ return
+ }
+ Register(OnTheFly{})
+ dt := newDT()
+ b := new(bytes.Buffer)
+ err := NewEncoder(b).Encode(dt)
+ if err != nil {
+ t.Fatal("encode:", err)
+ }
+ debugBuffer := bytes.NewBuffer(b.Bytes())
+ dt2 := &DT{}
+ err = NewDecoder(b).Decode(&dt2)
+ if err != nil {
+ t.Error("decode:", err)
+ }
+ debugFunc(debugBuffer)
+}
+
+func encFuzzDec(rng *rand.Rand, in any) error {
+ buf := new(bytes.Buffer)
+ enc := NewEncoder(buf)
+ if err := enc.Encode(&in); err != nil {
+ return err
+ }
+
+ b := buf.Bytes()
+ for i, bi := range b {
+ if rng.Intn(10) < 3 {
+ b[i] = bi + uint8(rng.Intn(256))
+ }
+ }
+
+ dec := NewDecoder(buf)
+ var e any
+ if err := dec.Decode(&e); err != nil {
+ return err
+ }
+ return nil
+}
+
+// This does some "fuzz testing" by attempting to decode a sequence of random bytes.
+func TestFuzz(t *testing.T) {
+ if !*doFuzzTests {
+ t.Skipf("disabled; run with -gob.fuzz to enable")
+ }
+
+ // all possible inputs
+ input := []any{
+ new(int),
+ new(float32),
+ new(float64),
+ new(complex128),
+ &ByteStruct{255},
+ &ArrayStruct{},
+ &StringStruct{"hello"},
+ &GobTest1{0, &StringStruct{"hello"}},
+ }
+ testFuzz(t, time.Now().UnixNano(), 100, input...)
+}
+
+func TestFuzzRegressions(t *testing.T) {
+ if !*doFuzzTests {
+ t.Skipf("disabled; run with -gob.fuzz to enable")
+ }
+
+ // An instance triggering a type name of length ~102 GB.
+ testFuzz(t, 1328492090837718000, 100, new(float32))
+ // An instance triggering a type name of 1.6 GB.
+ // Note: can take several minutes to run.
+ testFuzz(t, 1330522872628565000, 100, new(int))
+}
+
+func testFuzz(t *testing.T, seed int64, n int, input ...any) {
+ for _, e := range input {
+ t.Logf("seed=%d n=%d e=%T", seed, n, e)
+ rng := rand.New(rand.NewSource(seed))
+ for i := 0; i < n; i++ {
+ encFuzzDec(rng, e)
+ }
+ }
+}
+
+// TestFuzzOneByte tries to decode corrupted input sequences
+// and checks that no panic occurs.
+func TestFuzzOneByte(t *testing.T) {
+ if !*doFuzzTests {
+ t.Skipf("disabled; run with -gob.fuzz to enable")
+ }
+
+ buf := new(strings.Builder)
+ Register(OnTheFly{})
+ dt := newDT()
+ if err := NewEncoder(buf).Encode(dt); err != nil {
+ t.Fatal(err)
+ }
+ s := buf.String()
+
+ indices := make([]int, 0, len(s))
+ for i := 0; i < len(s); i++ {
+ switch i {
+ case 14, 167, 231, 265: // a slice length, corruptions are not handled yet.
+ continue
+ case 248:
+ // Large map size, which currently causes an out of memory panic.
+ // See golang.org/issue/24308 and golang.org/issue/20221.
+ continue
+ }
+ indices = append(indices, i)
+ }
+ if testing.Short() {
+ indices = []int{1, 111, 178} // known fixed panics
+ }
+ for _, i := range indices {
+ for j := 0; j < 256; j += 3 {
+ b := []byte(s)
+ b[i] ^= byte(j)
+ var e DT
+ func() {
+ defer func() {
+ if p := recover(); p != nil {
+ t.Errorf("crash for b[%d] ^= 0x%x", i, j)
+ panic(p)
+ }
+ }()
+ err := NewDecoder(bytes.NewReader(b)).Decode(&e)
+ _ = err
+ }()
+ }
+ }
+}
+
+// Don't crash, just give error with invalid type id.
+// Issue 9649.
+func TestErrorInvalidTypeId(t *testing.T) {
+ data := []byte{0x01, 0x00, 0x01, 0x00}
+ d := NewDecoder(bytes.NewReader(data))
+ // When running d.Decode(&foo) the first time the decoder stops
+ // after []byte{0x01, 0x00} and reports an errBadType. Running
+ // d.Decode(&foo) again on exactly the same input sequence should
+ // give another errBadType, but instead caused a panic because
+ // decoderMap wasn't cleaned up properly after the first error.
+ for i := 0; i < 2; i++ {
+ var foo struct{}
+ err := d.Decode(&foo)
+ if err != errBadType {
+ t.Fatalf("decode: expected %s, got %s", errBadType, err)
+ }
+ }
+}
+
+type LargeSliceByte struct {
+ S []byte
+}
+
+type LargeSliceInt8 struct {
+ S []int8
+}
+
+type StringPair struct {
+ A, B string
+}
+
+type LargeSliceStruct struct {
+ S []StringPair
+}
+
+type LargeSliceString struct {
+ S []string
+}
+
+func testEncodeDecode(t *testing.T, in, out any) {
+ t.Helper()
+ var b bytes.Buffer
+ err := NewEncoder(&b).Encode(in)
+ if err != nil {
+ t.Fatal("encode:", err)
+ }
+ err = NewDecoder(&b).Decode(out)
+ if err != nil {
+ t.Fatal("decode:", err)
+ }
+ if !reflect.DeepEqual(in, out) {
+ t.Errorf("output mismatch")
+ }
+}
+
+func TestLargeSlice(t *testing.T) {
+ t.Run("byte", func(t *testing.T) {
+ if unsafe.Sizeof(uintptr(0)) > 4 {
+ t.Parallel() // Only run in parallel in a large address space
+ }
+ s := make([]byte, 10<<21)
+ for i := range s {
+ s[i] = byte(i)
+ }
+ st := &LargeSliceByte{S: s}
+ rt := &LargeSliceByte{}
+ testEncodeDecode(t, st, rt)
+ })
+ t.Run("int8", func(t *testing.T) {
+ if unsafe.Sizeof(uintptr(0)) > 4 {
+ t.Parallel()
+ }
+ s := make([]int8, 10<<21)
+ for i := range s {
+ s[i] = int8(i)
+ }
+ st := &LargeSliceInt8{S: s}
+ rt := &LargeSliceInt8{}
+ testEncodeDecode(t, st, rt)
+ })
+ t.Run("struct", func(t *testing.T) {
+ if unsafe.Sizeof(uintptr(0)) > 4 {
+ t.Parallel()
+ }
+ s := make([]StringPair, 1<<21)
+ for i := range s {
+ s[i].A = string(rune(i))
+ s[i].B = s[i].A
+ }
+ st := &LargeSliceStruct{S: s}
+ rt := &LargeSliceStruct{}
+ testEncodeDecode(t, st, rt)
+ })
+ t.Run("string", func(t *testing.T) {
+ if unsafe.Sizeof(uintptr(0)) > 4 {
+ t.Parallel()
+ }
+ s := make([]string, 1<<21)
+ for i := range s {
+ s[i] = string(rune(i))
+ }
+ st := &LargeSliceString{S: s}
+ rt := &LargeSliceString{}
+ testEncodeDecode(t, st, rt)
+ })
+}
+
+func TestLocalRemoteTypesMismatch(t *testing.T) {
+ // Test data is from https://go.dev/issue/62117.
+ testData := []byte{9, 127, 3, 1, 2, 255, 128, 0, 0, 0, 3, 255, 128, 0}
+
+ var v []*struct{}
+ buf := bytes.NewBuffer(testData)
+ err := NewDecoder(buf).Decode(&v)
+ if err == nil {
+ t.Error("Encode/Decode: expected error but got err == nil")
+ }
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-28 07:13:03 +0000