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test_codec.go
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test_codec.go
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// Copyright (C) 2019-2023, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package codec
import (
"math"
"testing"
"github.com/stretchr/testify/require"
)
var (
Tests = []func(c GeneralCodec, t testing.TB){
TestStruct,
TestRegisterStructTwice,
TestUInt32,
TestUIntPtr,
TestSlice,
TestMaxSizeSlice,
TestBool,
TestArray,
TestBigArray,
TestPointerToStruct,
TestSliceOfStruct,
TestStructWithNullable,
TestInterface,
TestSliceOfInterface,
TestArrayOfInterface,
TestPointerToInterface,
TestString,
TestNilSlice,
TestSerializeUnexportedField,
TestSerializeOfNoSerializeField,
TestNilSliceSerialization,
TestEmptySliceSerialization,
TestSliceWithEmptySerialization,
TestSliceWithEmptySerializationOutOfMemory,
TestSliceTooLarge,
TestNegativeNumbers,
TestTooLargeUnmarshal,
TestUnmarshalInvalidInterface,
TestRestrictedSlice,
TestExtraSpace,
TestSliceLengthOverflow,
TestMap,
}
MultipleTagsTests = []func(c GeneralCodec, t testing.TB){
TestMultipleTags,
}
)
// The below structs and interfaces exist
// for the sake of testing
var (
_ Foo = (*MyInnerStruct)(nil)
_ Foo = (*MyInnerStruct2)(nil)
)
type Foo interface {
Foo() int
}
type MyInnerStruct struct {
Str string `serialize:"true"`
NumberNotProvided *int32 `serialize:"true,nullable"`
}
func (*MyInnerStruct) Foo() int {
return 1
}
type MyInnerStruct2 struct {
Bool bool `serialize:"true"`
}
func (*MyInnerStruct2) Foo() int {
return 2
}
// MyInnerStruct3 embeds Foo, an interface,
// so it has to implement TypeID and ConcreteInstance
type MyInnerStruct3 struct {
Str string `serialize:"true"`
M1 MyInnerStruct `serialize:"true"`
F Foo `serialize:"true"`
}
type MyStructWithNullable struct {
Interface any `serialize:"true,nullable"`
Int32 *int32 `serialize:"true,nullable"`
Int64 *int64 `serialize:"true,nullable"`
Int32Slice []*int32 `serialize:"true,nullable"`
Int32Array [2]*int32 `serialize:"true,nullable"`
Int32Map map[int32]*int32 `serialize:"true,nullable"`
}
type myStruct struct {
InnerStruct MyInnerStruct `serialize:"true"`
InnerStruct2 *MyInnerStruct `serialize:"true"`
Member1 int64 `serialize:"true"`
Member2 uint16 `serialize:"true"`
MyArray2 [5]string `serialize:"true"`
MyArray3 [3]MyInnerStruct `serialize:"true"`
MyArray4 [2]*MyInnerStruct2 `serialize:"true"`
MySlice []byte `serialize:"true"`
MySlice2 []string `serialize:"true"`
MySlice3 []MyInnerStruct `serialize:"true"`
MySlice4 []*MyInnerStruct2 `serialize:"true"`
MyArray [4]byte `serialize:"true"`
MyInterface Foo `serialize:"true"`
MySlice5 []Foo `serialize:"true"`
InnerStruct3 MyInnerStruct3 `serialize:"true"`
MyPointer *Foo `serialize:"true"`
MyMap1 map[string]string `serialize:"true"`
MyMap2 map[int32][]MyInnerStruct3 `serialize:"true"`
MyMap3 map[MyInnerStruct2][]int32 `serialize:"true"`
MyMap4 map[int32]*int32 `serialize:"true"`
MyMap5 map[int32]int32 `serialize:"true"`
MyMap6 map[[5]int32]int32 `serialize:"true"`
MyMap7 map[interface{}]interface{} `serialize:"true"`
Uint8 uint8 `serialize:"true"`
Int8 int8 `serialize:"true"`
Uint16 uint16 `serialize:"true"`
Int16 int16 `serialize:"true"`
Uint32 uint32 `serialize:"true"`
Int32 int32 `serialize:"true"`
Uint64 uint64 `serialize:"true"`
Int64 int64 `serialize:"true"`
Bool bool `serialize:"true"`
String string `serialize:"true"`
}
// Test marshaling/unmarshaling a complicated struct
func TestStruct(codec GeneralCodec, t testing.TB) {
require := require.New(t)
temp := Foo(&MyInnerStruct{})
myMap3 := make(map[MyInnerStruct2][]int32)
myMap3[MyInnerStruct2{false}] = []int32{991, 12}
myMap3[MyInnerStruct2{true}] = []int32{1911, 1921}
myMap4 := make(map[int32]*int32)
zero := int32(0)
one := int32(1)
myMap4[0] = &zero
myMap4[1] = &one
myMap6 := make(map[[5]int32]int32)
myMap6[[5]int32{0, 1, 2, 3, 4}] = 1
myMap6[[5]int32{1, 2, 3, 4, 5}] = 2
myMap7 := make(map[interface{}]interface{})
myMap7["key"] = "value"
myMap7[int32(1)] = int32(2)
number := int32(8)
myStructInstance := myStruct{
InnerStruct: MyInnerStruct{"hello", nil},
InnerStruct2: &MyInnerStruct{"yello", nil},
Member1: 1,
Member2: 2,
MySlice: []byte{1, 2, 3, 4},
MySlice2: []string{"one", "two", "three"},
MySlice3: []MyInnerStruct{{"abc", nil}, {"ab", &number}, {"c", nil}},
MySlice4: []*MyInnerStruct2{{true}, {}},
MySlice5: []Foo{&MyInnerStruct2{true}, &MyInnerStruct2{}},
MyArray: [4]byte{5, 6, 7, 8},
MyArray2: [5]string{"four", "five", "six", "seven"},
MyArray3: [3]MyInnerStruct{{"d", nil}, {"e", nil}, {"f", nil}},
MyArray4: [2]*MyInnerStruct2{{}, {true}},
MyInterface: &MyInnerStruct{"yeet", &number},
InnerStruct3: MyInnerStruct3{
Str: "str",
M1: MyInnerStruct{
Str: "other str",
},
F: &MyInnerStruct2{},
},
MyPointer: &temp,
MyMap1: map[string]string{
"test": "test",
},
MyMap2: map[int32][]MyInnerStruct3{
199921: {
{
Str: "str-1",
M1: MyInnerStruct{
Str: "other str",
},
F: &MyInnerStruct2{},
},
{
Str: "str-2",
M1: MyInnerStruct{
Str: "other str",
},
F: &MyInnerStruct2{},
},
},
1921: {
{
Str: "str0",
M1: MyInnerStruct{
Str: "other str",
},
F: &MyInnerStruct2{},
},
{
Str: "str1",
M1: MyInnerStruct{
Str: "other str",
},
F: &MyInnerStruct2{},
},
},
},
MyMap3: myMap3,
MyMap4: myMap4,
MyMap6: myMap6,
MyMap7: myMap7,
}
manager := NewDefaultManager()
// Register the types that may be unmarshaled into interfaces
require.NoError(codec.RegisterType(&MyInnerStruct{}))
require.NoError(codec.RegisterType(&MyInnerStruct2{}))
require.NoError(codec.RegisterType(""))
require.NoError(codec.RegisterType(int32(0)))
require.NoError(manager.RegisterCodec(0, codec))
myStructBytes, err := manager.Marshal(0, myStructInstance)
require.NoError(err)
bytesLen, err := manager.Size(0, myStructInstance)
require.NoError(err)
require.Len(myStructBytes, bytesLen)
myStructUnmarshaled := &myStruct{}
version, err := manager.Unmarshal(myStructBytes, myStructUnmarshaled)
require.NoError(err)
// In myStructInstance MyMap4 is nil and in myStructUnmarshaled MyMap4 is an
// empty map
require.Empty(myStructUnmarshaled.MyMap5)
myStructUnmarshaled.MyMap5 = nil
require.Zero(version)
require.Equal(myStructInstance, *myStructUnmarshaled)
}
func TestRegisterStructTwice(codec GeneralCodec, t testing.TB) {
require := require.New(t)
require.NoError(codec.RegisterType(&MyInnerStruct{}))
err := codec.RegisterType(&MyInnerStruct{})
require.ErrorIs(err, ErrDuplicateType)
}
func TestUInt32(codec GeneralCodec, t testing.TB) {
require := require.New(t)
number := uint32(500)
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, number)
require.NoError(err)
bytesLen, err := manager.Size(0, number)
require.NoError(err)
require.Len(bytes, bytesLen)
var numberUnmarshaled uint32
version, err := manager.Unmarshal(bytes, &numberUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(number, numberUnmarshaled)
}
func TestUIntPtr(codec GeneralCodec, t testing.TB) {
require := require.New(t)
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
number := uintptr(500)
_, err := manager.Marshal(0, number)
require.ErrorIs(err, ErrUnsupportedType)
}
func TestSlice(codec GeneralCodec, t testing.TB) {
require := require.New(t)
mySlice := []bool{true, false, true, true}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, mySlice)
require.NoError(err)
bytesLen, err := manager.Size(0, mySlice)
require.NoError(err)
require.Len(bytes, bytesLen)
var sliceUnmarshaled []bool
version, err := manager.Unmarshal(bytes, &sliceUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(mySlice, sliceUnmarshaled)
}
// Test marshalling/unmarshalling largest possible slice
func TestMaxSizeSlice(codec GeneralCodec, t testing.TB) {
require := require.New(t)
mySlice := make([]string, math.MaxUint16)
mySlice[0] = "first!"
mySlice[math.MaxUint16-1] = "last!"
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, mySlice)
require.NoError(err)
bytesLen, err := manager.Size(0, mySlice)
require.NoError(err)
require.Len(bytes, bytesLen)
var sliceUnmarshaled []string
version, err := manager.Unmarshal(bytes, &sliceUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(mySlice, sliceUnmarshaled)
}
// Test marshalling a bool
func TestBool(codec GeneralCodec, t testing.TB) {
require := require.New(t)
myBool := true
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, myBool)
require.NoError(err)
bytesLen, err := manager.Size(0, myBool)
require.NoError(err)
require.Len(bytes, bytesLen)
var boolUnmarshaled bool
version, err := manager.Unmarshal(bytes, &boolUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(myBool, boolUnmarshaled)
}
// Test marshalling an array
func TestArray(codec GeneralCodec, t testing.TB) {
require := require.New(t)
myArr := [5]uint64{5, 6, 7, 8, 9}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, myArr)
require.NoError(err)
bytesLen, err := manager.Size(0, myArr)
require.NoError(err)
require.Len(bytes, bytesLen)
var myArrUnmarshaled [5]uint64
version, err := manager.Unmarshal(bytes, &myArrUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(myArr, myArrUnmarshaled)
}
// Test marshalling a really big array
func TestBigArray(codec GeneralCodec, t testing.TB) {
require := require.New(t)
myArr := [30000]uint64{5, 6, 7, 8, 9}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, myArr)
require.NoError(err)
bytesLen, err := manager.Size(0, myArr)
require.NoError(err)
require.Len(bytes, bytesLen)
var myArrUnmarshaled [30000]uint64
version, err := manager.Unmarshal(bytes, &myArrUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(myArr, myArrUnmarshaled)
}
// Test marshalling a pointer to a struct
func TestPointerToStruct(codec GeneralCodec, t testing.TB) {
require := require.New(t)
myPtr := &MyInnerStruct{Str: "Hello!"}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, myPtr)
require.NoError(err)
bytesLen, err := manager.Size(0, myPtr)
require.NoError(err)
require.Len(bytes, bytesLen)
var myPtrUnmarshaled *MyInnerStruct
version, err := manager.Unmarshal(bytes, &myPtrUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(myPtr, myPtrUnmarshaled)
}
func TestStructWithNullable(codec GeneralCodec, t testing.TB) {
require := require.New(t)
n1 := int32(5)
n2 := int64(10)
struct1 := MyStructWithNullable{
Interface: nil,
Int32: &n1,
Int64: &n2,
Int32Slice: []*int32{
nil,
nil,
&n1,
},
Int32Array: [2]*int32{
nil,
&n1,
},
Int32Map: map[int32]*int32{
1: nil,
2: &n1,
},
}
require.NoError(codec.RegisterType(&MyStructWithNullable{}))
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, struct1)
require.NoError(err)
bytesLen, err := manager.Size(0, struct1)
require.NoError(err)
require.Len(bytes, bytesLen)
var struct1Unmarshaled MyStructWithNullable
version, err := manager.Unmarshal(bytes, &struct1Unmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(struct1, struct1Unmarshaled)
struct1 = MyStructWithNullable{
Int32Slice: []*int32{},
Int32Map: map[int32]*int32{},
}
bytes, err = manager.Marshal(0, struct1)
require.NoError(err)
bytesLen, err = manager.Size(0, struct1)
require.NoError(err)
require.Len(bytes, bytesLen)
var struct1Unmarshaled2 MyStructWithNullable
version, err = manager.Unmarshal(bytes, &struct1Unmarshaled2)
require.NoError(err)
require.Zero(version)
require.Equal(struct1, struct1Unmarshaled2)
}
// Test marshalling a slice of structs
func TestSliceOfStruct(codec GeneralCodec, t testing.TB) {
require := require.New(t)
n1 := int32(-1)
n2 := int32(0xff)
mySlice := []MyInnerStruct3{
{
Str: "One",
M1: MyInnerStruct{"Two", &n1},
F: &MyInnerStruct{"Three", &n2},
},
{
Str: "Four",
M1: MyInnerStruct{"Five", nil},
F: &MyInnerStruct{"Six", nil},
},
}
require.NoError(codec.RegisterType(&MyInnerStruct{}))
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, mySlice)
require.NoError(err)
bytesLen, err := manager.Size(0, mySlice)
require.NoError(err)
require.Len(bytes, bytesLen)
var mySliceUnmarshaled []MyInnerStruct3
version, err := manager.Unmarshal(bytes, &mySliceUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(mySlice, mySliceUnmarshaled)
}
// Test marshalling an interface
func TestInterface(codec GeneralCodec, t testing.TB) {
require := require.New(t)
require.NoError(codec.RegisterType(&MyInnerStruct2{}))
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
var f Foo = &MyInnerStruct2{true}
bytes, err := manager.Marshal(0, &f)
require.NoError(err)
bytesLen, err := manager.Size(0, &f)
require.NoError(err)
require.Len(bytes, bytesLen)
var unmarshaledFoo Foo
version, err := manager.Unmarshal(bytes, &unmarshaledFoo)
require.NoError(err)
require.Zero(version)
require.Equal(f, unmarshaledFoo)
}
// Test marshalling a slice of interfaces
func TestSliceOfInterface(codec GeneralCodec, t testing.TB) {
require := require.New(t)
mySlice := []Foo{
&MyInnerStruct{
Str: "Hello",
},
&MyInnerStruct{
Str: ", World!",
},
}
require.NoError(codec.RegisterType(&MyInnerStruct{}))
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, mySlice)
require.NoError(err)
bytesLen, err := manager.Size(0, mySlice)
require.NoError(err)
require.Len(bytes, bytesLen)
var mySliceUnmarshaled []Foo
version, err := manager.Unmarshal(bytes, &mySliceUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(mySlice, mySliceUnmarshaled)
}
// Test marshalling an array of interfaces
func TestArrayOfInterface(codec GeneralCodec, t testing.TB) {
require := require.New(t)
myArray := [2]Foo{
&MyInnerStruct{
Str: "Hello",
},
&MyInnerStruct{
Str: ", World!",
},
}
require.NoError(codec.RegisterType(&MyInnerStruct{}))
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, myArray)
require.NoError(err)
bytesLen, err := manager.Size(0, myArray)
require.NoError(err)
require.Len(bytes, bytesLen)
var myArrayUnmarshaled [2]Foo
version, err := manager.Unmarshal(bytes, &myArrayUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(myArray, myArrayUnmarshaled)
}
// Test marshalling a pointer to an interface
func TestPointerToInterface(codec GeneralCodec, t testing.TB) {
require := require.New(t)
var myinnerStruct Foo = &MyInnerStruct{Str: "Hello!"}
myPtr := &myinnerStruct
require.NoError(codec.RegisterType(&MyInnerStruct{}))
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, &myPtr)
require.NoError(err)
bytesLen, err := manager.Size(0, &myPtr)
require.NoError(err)
require.Len(bytes, bytesLen)
var myPtrUnmarshaled *Foo
version, err := manager.Unmarshal(bytes, &myPtrUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(myPtr, myPtrUnmarshaled)
}
// Test marshalling a string
func TestString(codec GeneralCodec, t testing.TB) {
require := require.New(t)
myString := "Ayy"
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, myString)
require.NoError(err)
bytesLen, err := manager.Size(0, myString)
require.NoError(err)
require.Len(bytes, bytesLen)
var stringUnmarshaled string
version, err := manager.Unmarshal(bytes, &stringUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(myString, stringUnmarshaled)
}
// Ensure a nil slice is unmarshaled to slice with length 0
func TestNilSlice(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type structWithSlice struct {
Slice []byte `serialize:"true"`
}
myStruct := structWithSlice{Slice: nil}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
bytes, err := manager.Marshal(0, myStruct)
require.NoError(err)
bytesLen, err := manager.Size(0, myStruct)
require.NoError(err)
require.Len(bytes, bytesLen)
var structUnmarshaled structWithSlice
version, err := manager.Unmarshal(bytes, &structUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Empty(structUnmarshaled.Slice)
}
// Ensure that trying to serialize a struct with an unexported member
// that has `serialize:"true"` returns error
func TestSerializeUnexportedField(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type s struct {
ExportedField string `serialize:"true"`
unexportedField string `serialize:"true"` //nolint:revive
}
myS := s{
ExportedField: "Hello, ",
unexportedField: "world!",
}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
_, err := manager.Marshal(0, myS)
require.ErrorIs(err, ErrUnexportedField)
_, err = manager.Size(0, myS)
require.ErrorIs(err, ErrUnexportedField)
}
func TestSerializeOfNoSerializeField(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type s struct {
SerializedField string `serialize:"true"`
UnserializedField string `serialize:"false"`
UnmarkedField string
}
myS := s{
SerializedField: "Serialize me",
UnserializedField: "Do not serialize me",
UnmarkedField: "No declared serialize",
}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
marshalled, err := manager.Marshal(0, myS)
require.NoError(err)
bytesLen, err := manager.Size(0, myS)
require.NoError(err)
require.Len(marshalled, bytesLen)
unmarshalled := s{}
version, err := manager.Unmarshal(marshalled, &unmarshalled)
require.NoError(err)
require.Zero(version)
expectedUnmarshalled := s{SerializedField: "Serialize me"}
require.Equal(expectedUnmarshalled, unmarshalled)
}
// Test marshalling of nil slice
func TestNilSliceSerialization(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type simpleSliceStruct struct {
Arr []uint32 `serialize:"true"`
}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
val := &simpleSliceStruct{}
expected := []byte{0, 0, 0, 0, 0, 0} // 0 for codec version, then nil slice marshaled as 0 length slice
result, err := manager.Marshal(0, val)
require.NoError(err)
require.Equal(expected, result)
bytesLen, err := manager.Size(0, val)
require.NoError(err)
require.Len(result, bytesLen)
valUnmarshaled := &simpleSliceStruct{}
version, err := manager.Unmarshal(result, &valUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Empty(valUnmarshaled.Arr)
}
// Test marshaling a slice that has 0 elements (but isn't nil)
func TestEmptySliceSerialization(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type simpleSliceStruct struct {
Arr []uint32 `serialize:"true"`
}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
val := &simpleSliceStruct{Arr: make([]uint32, 0, 1)}
expected := []byte{0, 0, 0, 0, 0, 0} // 0 for codec version (uint16) and 0 for size (uint32)
result, err := manager.Marshal(0, val)
require.NoError(err)
require.Equal(expected, result)
bytesLen, err := manager.Size(0, val)
require.NoError(err)
require.Len(result, bytesLen)
valUnmarshaled := &simpleSliceStruct{}
version, err := manager.Unmarshal(result, &valUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(val, valUnmarshaled)
}
// Test marshaling slice that is not nil and not empty
func TestSliceWithEmptySerialization(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type emptyStruct struct{}
type nestedSliceStruct struct {
Arr []emptyStruct `serialize:"true"`
}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
val := &nestedSliceStruct{
Arr: make([]emptyStruct, 1000),
}
expected := []byte{0x00, 0x00, 0x00, 0x00, 0x03, 0xE8} // codec version (0x00, 0x00) then 1000 for numElts
result, err := manager.Marshal(0, val)
require.NoError(err)
require.Equal(expected, result)
bytesLen, err := manager.Size(0, val)
require.NoError(err)
require.Len(result, bytesLen)
unmarshaled := nestedSliceStruct{}
version, err := manager.Unmarshal(expected, &unmarshaled)
require.NoError(err)
require.Zero(version)
require.Len(unmarshaled.Arr, 1000)
}
func TestSliceWithEmptySerializationOutOfMemory(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type emptyStruct struct{}
type nestedSliceStruct struct {
Arr []emptyStruct `serialize:"true"`
}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
val := &nestedSliceStruct{
Arr: make([]emptyStruct, math.MaxInt32),
}
_, err := manager.Marshal(0, val)
require.ErrorIs(err, ErrMaxSliceLenExceeded)
bytesLen, err := manager.Size(0, val)
require.NoError(err)
require.Equal(6, bytesLen) // 2 byte codec version + 4 byte length prefix
}
func TestSliceTooLarge(codec GeneralCodec, t testing.TB) {
require := require.New(t)
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
val := []struct{}{}
b := []byte{0x00, 0x00, 0xff, 0xff, 0xff, 0xff}
_, err := manager.Unmarshal(b, &val)
require.ErrorIs(err, ErrMaxSliceLenExceeded)
}
// Ensure serializing structs with negative number members works
func TestNegativeNumbers(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type s struct {
MyInt8 int8 `serialize:"true"`
MyInt16 int16 `serialize:"true"`
MyInt32 int32 `serialize:"true"`
MyInt64 int64 `serialize:"true"`
}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
myS := s{-1, -2, -3, -4}
bytes, err := manager.Marshal(0, myS)
require.NoError(err)
bytesLen, err := manager.Size(0, myS)
require.NoError(err)
require.Len(bytes, bytesLen)
mySUnmarshaled := s{}
version, err := manager.Unmarshal(bytes, &mySUnmarshaled)
require.NoError(err)
require.Zero(version)
require.Equal(myS, mySUnmarshaled)
}
// Ensure deserializing structs with too many bytes errors correctly
func TestTooLargeUnmarshal(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type inner struct {
B uint16 `serialize:"true"`
}
bytes := []byte{0, 0, 0, 0}
manager := NewManager(3)
require.NoError(manager.RegisterCodec(0, codec))
s := inner{}
_, err := manager.Unmarshal(bytes, &s)
require.ErrorIs(err, ErrUnmarshalTooBig)
}
type outerInterface interface {
ToInt() int
}
type outer struct {
Interface outerInterface `serialize:"true"`
}
type innerInterface struct{}
func (*innerInterface) ToInt() int {
return 0
}
type innerNoInterface struct{}
// Ensure deserializing structs into the wrong interface errors gracefully
func TestUnmarshalInvalidInterface(codec GeneralCodec, t testing.TB) {
require := require.New(t)
manager := NewDefaultManager()
require.NoError(codec.RegisterType(&innerInterface{}))
require.NoError(codec.RegisterType(&innerNoInterface{}))
require.NoError(manager.RegisterCodec(0, codec))
{
bytes := []byte{0, 0, 0, 0, 0, 0}
s := outer{}
version, err := manager.Unmarshal(bytes, &s)
require.NoError(err)
require.Zero(version)
}
{
bytes := []byte{0, 0, 0, 0, 0, 1}
s := outer{}
_, err := manager.Unmarshal(bytes, &s)
require.ErrorIs(err, ErrDoesNotImplementInterface)
}
}
// Ensure deserializing slices that have been length restricted errors correctly
func TestRestrictedSlice(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type inner struct {
Bytes []byte `serialize:"true" len:"2"`
}
bytes := []byte{0, 0, 0, 0, 0, 3, 0, 1, 2}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
s := inner{}
_, err := manager.Unmarshal(bytes, &s)
require.ErrorIs(err, ErrMaxSliceLenExceeded)
s.Bytes = []byte{0, 1, 2}
_, err = manager.Marshal(0, s)
require.ErrorIs(err, ErrMaxSliceLenExceeded)
}
// Test unmarshaling something with extra data
func TestExtraSpace(codec GeneralCodec, t testing.TB) {
require := require.New(t)
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))
// codec version 0x0000 then 0x01 for b then 0x02 as extra data.
byteSlice := []byte{0x00, 0x00, 0x01, 0x02}
var b byte
_, err := manager.Unmarshal(byteSlice, &b)
require.ErrorIs(err, ErrExtraSpace)
}
// Ensure deserializing slices that have been length restricted errors correctly
func TestSliceLengthOverflow(codec GeneralCodec, t testing.TB) {
require := require.New(t)
type inner struct {
Vals []uint32 `serialize:"true" len:"2"`
}
bytes := []byte{
// Codec Version:
0x00, 0x00,
// Slice Length:
0xff, 0xff, 0xff, 0xff,
}
manager := NewDefaultManager()
require.NoError(manager.RegisterCodec(0, codec))