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encode_test.go
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encode_test.go
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// Copyright (c) Faye Amacker. All rights reserved.
// Licensed under the MIT License. See LICENSE in the project root for license information.
package cbor
import (
"bytes"
"encoding/binary"
"fmt"
"io"
"math"
"math/big"
"reflect"
"strings"
"testing"
"time"
)
type marshalTest struct {
wantData []byte
values []interface{}
}
type marshalErrorTest struct {
name string
value interface{}
wantErrorMsg string
}
// CBOR test data are from https://tools.ietf.org/html/rfc7049#appendix-A.
var marshalTests = []marshalTest{
// unsigned integer
{wantData: hexDecode("00"), values: []interface{}{uint(0), uint8(0), uint16(0), uint32(0), uint64(0), int(0), int8(0), int16(0), int32(0), int64(0)}},
{wantData: hexDecode("01"), values: []interface{}{uint(1), uint8(1), uint16(1), uint32(1), uint64(1), int(1), int8(1), int16(1), int32(1), int64(1)}},
{wantData: hexDecode("0a"), values: []interface{}{uint(10), uint8(10), uint16(10), uint32(10), uint64(10), int(10), int8(10), int16(10), int32(10), int64(10)}},
{wantData: hexDecode("17"), values: []interface{}{uint(23), uint8(23), uint16(23), uint32(23), uint64(23), int(23), int8(23), int16(23), int32(23), int64(23)}},
{wantData: hexDecode("1818"), values: []interface{}{uint(24), uint8(24), uint16(24), uint32(24), uint64(24), int(24), int8(24), int16(24), int32(24), int64(24)}},
{wantData: hexDecode("1819"), values: []interface{}{uint(25), uint8(25), uint16(25), uint32(25), uint64(25), int(25), int8(25), int16(25), int32(25), int64(25)}},
{wantData: hexDecode("1864"), values: []interface{}{uint(100), uint8(100), uint16(100), uint32(100), uint64(100), int(100), int8(100), int16(100), int32(100), int64(100)}},
{wantData: hexDecode("18ff"), values: []interface{}{uint(255), uint8(255), uint16(255), uint32(255), uint64(255), int(255), int16(255), int32(255), int64(255)}},
{wantData: hexDecode("190100"), values: []interface{}{uint(256), uint16(256), uint32(256), uint64(256), int(256), int16(256), int32(256), int64(256)}},
{wantData: hexDecode("1903e8"), values: []interface{}{uint(1000), uint16(1000), uint32(1000), uint64(1000), int(1000), int16(1000), int32(1000), int64(1000)}},
{wantData: hexDecode("19ffff"), values: []interface{}{uint(65535), uint16(65535), uint32(65535), uint64(65535), int(65535), int32(65535), int64(65535)}},
{wantData: hexDecode("1a00010000"), values: []interface{}{uint(65536), uint32(65536), uint64(65536), int(65536), int32(65536), int64(65536)}},
{wantData: hexDecode("1a000f4240"), values: []interface{}{uint(1000000), uint32(1000000), uint64(1000000), int(1000000), int32(1000000), int64(1000000)}},
{wantData: hexDecode("1affffffff"), values: []interface{}{uint(4294967295), uint32(4294967295), uint64(4294967295), int64(4294967295)}},
{wantData: hexDecode("1b000000e8d4a51000"), values: []interface{}{uint64(1000000000000), int64(1000000000000)}},
{wantData: hexDecode("1bffffffffffffffff"), values: []interface{}{uint64(18446744073709551615)}},
// negative integer
{wantData: hexDecode("20"), values: []interface{}{int(-1), int8(-1), int16(-1), int32(-1), int64(-1)}},
{wantData: hexDecode("29"), values: []interface{}{int(-10), int8(-10), int16(-10), int32(-10), int64(-10)}},
{wantData: hexDecode("37"), values: []interface{}{int(-24), int8(-24), int16(-24), int32(-24), int64(-24)}},
{wantData: hexDecode("3818"), values: []interface{}{int(-25), int8(-25), int16(-25), int32(-25), int64(-25)}},
{wantData: hexDecode("3863"), values: []interface{}{int(-100), int8(-100), int16(-100), int32(-100), int64(-100)}},
{wantData: hexDecode("38ff"), values: []interface{}{int(-256), int16(-256), int32(-256), int64(-256)}},
{wantData: hexDecode("390100"), values: []interface{}{int(-257), int16(-257), int32(-257), int64(-257)}},
{wantData: hexDecode("3903e7"), values: []interface{}{int(-1000), int16(-1000), int32(-1000), int64(-1000)}},
{wantData: hexDecode("39ffff"), values: []interface{}{int(-65536), int32(-65536), int64(-65536)}},
{wantData: hexDecode("3a00010000"), values: []interface{}{int(-65537), int32(-65537), int64(-65537)}},
{wantData: hexDecode("3affffffff"), values: []interface{}{int64(-4294967296)}},
// byte string
{wantData: hexDecode("40"), values: []interface{}{[]byte{}}},
{wantData: hexDecode("4401020304"), values: []interface{}{[]byte{1, 2, 3, 4}, [...]byte{1, 2, 3, 4}}},
// text string
{wantData: hexDecode("60"), values: []interface{}{""}},
{wantData: hexDecode("6161"), values: []interface{}{"a"}},
{wantData: hexDecode("6449455446"), values: []interface{}{"IETF"}},
{wantData: hexDecode("62225c"), values: []interface{}{"\"\\"}},
{wantData: hexDecode("62c3bc"), values: []interface{}{"ü"}},
{wantData: hexDecode("63e6b0b4"), values: []interface{}{"水"}},
{wantData: hexDecode("64f0908591"), values: []interface{}{"𐅑"}},
// array
{
wantData: hexDecode("80"),
values: []interface{}{
[0]int{},
[]uint{},
// []uint8{},
[]uint16{},
[]uint32{},
[]uint64{},
[]int{},
[]int8{},
[]int16{},
[]int32{},
[]int64{},
[]string{},
[]bool{},
[]float32{},
[]float64{},
[]interface{}{},
},
},
{
wantData: hexDecode("83010203"),
values: []interface{}{
[...]int{1, 2, 3},
[]uint{1, 2, 3},
// []uint8{1, 2, 3},
[]uint16{1, 2, 3},
[]uint32{1, 2, 3},
[]uint64{1, 2, 3},
[]int{1, 2, 3},
[]int8{1, 2, 3},
[]int16{1, 2, 3},
[]int32{1, 2, 3},
[]int64{1, 2, 3},
[]interface{}{1, 2, 3},
},
},
{
wantData: hexDecode("8301820203820405"),
values: []interface{}{
[...]interface{}{1, [...]int{2, 3}, [...]int{4, 5}},
[]interface{}{1, []uint{2, 3}, []uint{4, 5}},
// []interface{}{1, []uint8{2, 3}, []uint8{4, 5}},
[]interface{}{1, []uint16{2, 3}, []uint16{4, 5}},
[]interface{}{1, []uint32{2, 3}, []uint32{4, 5}},
[]interface{}{1, []uint64{2, 3}, []uint64{4, 5}},
[]interface{}{1, []int{2, 3}, []int{4, 5}},
[]interface{}{1, []int8{2, 3}, []int8{4, 5}},
[]interface{}{1, []int16{2, 3}, []int16{4, 5}},
[]interface{}{1, []int32{2, 3}, []int32{4, 5}},
[]interface{}{1, []int64{2, 3}, []int64{4, 5}},
[]interface{}{1, []interface{}{2, 3}, []interface{}{4, 5}},
},
},
{
wantData: hexDecode("98190102030405060708090a0b0c0d0e0f101112131415161718181819"),
values: []interface{}{
[...]int{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},
[]uint{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},
// []uint8{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},
[]uint16{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},
[]uint32{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},
[]uint64{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},
[]int{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},
[]int8{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},
[]int16{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},
[]int32{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},
[]int64{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},
[]interface{}{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},
},
},
{
wantData: hexDecode("826161a161626163"),
values: []interface{}{
[...]interface{}{"a", map[string]string{"b": "c"}},
[]interface{}{"a", map[string]string{"b": "c"}},
[]interface{}{"a", map[interface{}]interface{}{"b": "c"}},
},
},
// map
{
wantData: hexDecode("a0"),
values: []interface{}{
map[uint]bool{},
map[uint8]bool{},
map[uint16]bool{},
map[uint32]bool{},
map[uint64]bool{},
map[int]bool{},
map[int8]bool{},
map[int16]bool{},
map[int32]bool{},
map[int64]bool{},
map[float32]bool{},
map[float64]bool{},
map[bool]bool{},
map[string]bool{},
map[interface{}]interface{}{},
},
},
{
wantData: hexDecode("a201020304"),
values: []interface{}{
map[uint]uint{3: 4, 1: 2},
map[uint8]uint8{3: 4, 1: 2},
map[uint16]uint16{3: 4, 1: 2},
map[uint32]uint32{3: 4, 1: 2},
map[uint64]uint64{3: 4, 1: 2},
map[int]int{3: 4, 1: 2},
map[int8]int8{3: 4, 1: 2},
map[int16]int16{3: 4, 1: 2},
map[int32]int32{3: 4, 1: 2},
map[int64]int64{3: 4, 1: 2},
map[interface{}]interface{}{3: 4, 1: 2},
},
},
{
wantData: hexDecode("a26161016162820203"),
values: []interface{}{
map[string]interface{}{"a": 1, "b": []interface{}{2, 3}},
map[interface{}]interface{}{"b": []interface{}{2, 3}, "a": 1},
},
},
{
wantData: hexDecode("a56161614161626142616361436164614461656145"),
values: []interface{}{
map[string]string{"a": "A", "b": "B", "c": "C", "d": "D", "e": "E"},
map[interface{}]interface{}{"b": "B", "a": "A", "c": "C", "e": "E", "d": "D"},
},
},
// tag
{
wantData: hexDecode("c074323031332d30332d32315432303a30343a30305a"),
values: []interface{}{
Tag{0, "2013-03-21T20:04:00Z"},
RawTag{0, hexDecode("74323031332d30332d32315432303a30343a30305a")},
},
}, // 0: standard date/time
{
wantData: hexDecode("c11a514b67b0"),
values: []interface{}{
Tag{1, uint64(1363896240)},
RawTag{1, hexDecode("1a514b67b0")},
},
}, // 1: epoch-based date/time
{
wantData: hexDecode("c249010000000000000000"),
values: []interface{}{
bigIntOrPanic("18446744073709551616"),
Tag{2, []byte{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
RawTag{2, hexDecode("49010000000000000000")},
},
}, // 2: positive bignum: 18446744073709551616
{
wantData: hexDecode("c349010000000000000000"),
values: []interface{}{
bigIntOrPanic("-18446744073709551617"),
Tag{3, []byte{0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}},
RawTag{3, hexDecode("49010000000000000000")},
},
}, // 3: negative bignum: -18446744073709551617
{
wantData: hexDecode("c1fb41d452d9ec200000"),
values: []interface{}{
Tag{1, float64(1363896240.5)},
RawTag{1, hexDecode("fb41d452d9ec200000")},
},
}, // 1: epoch-based date/time
{
wantData: hexDecode("d74401020304"),
values: []interface{}{
Tag{23, []byte{0x01, 0x02, 0x03, 0x04}},
RawTag{23, hexDecode("4401020304")},
},
}, // 23: expected conversion to base16 encoding
{
wantData: hexDecode("d818456449455446"),
values: []interface{}{
Tag{24, []byte{0x64, 0x49, 0x45, 0x54, 0x46}},
RawTag{24, hexDecode("456449455446")},
},
}, // 24: encoded cborBytes data item
{
wantData: hexDecode("d82076687474703a2f2f7777772e6578616d706c652e636f6d"),
values: []interface{}{
Tag{32, "http://www.example.com"},
RawTag{32, hexDecode("76687474703a2f2f7777772e6578616d706c652e636f6d")},
},
}, // 32: URI
// primitives
{wantData: hexDecode("f4"), values: []interface{}{false}},
{wantData: hexDecode("f5"), values: []interface{}{true}},
{wantData: hexDecode("f6"), values: []interface{}{nil, []byte(nil), []int(nil), map[uint]bool(nil), (*int)(nil), io.Reader(nil)}},
// simple values
{wantData: hexDecode("e0"), values: []interface{}{SimpleValue(0)}},
{wantData: hexDecode("f0"), values: []interface{}{SimpleValue(16)}},
{wantData: hexDecode("f820"), values: []interface{}{SimpleValue(32)}},
{wantData: hexDecode("f8ff"), values: []interface{}{SimpleValue(255)}},
// nan, positive and negative inf
{wantData: hexDecode("f97c00"), values: []interface{}{math.Inf(1)}},
{wantData: hexDecode("f97e00"), values: []interface{}{math.NaN()}},
{wantData: hexDecode("f9fc00"), values: []interface{}{math.Inf(-1)}},
// float32
{wantData: hexDecode("fa47c35000"), values: []interface{}{float32(100000.0)}},
{wantData: hexDecode("fa7f7fffff"), values: []interface{}{float32(3.4028234663852886e+38)}},
// float64
{wantData: hexDecode("fb3ff199999999999a"), values: []interface{}{float64(1.1)}},
{wantData: hexDecode("fb7e37e43c8800759c"), values: []interface{}{float64(1.0e+300)}},
{wantData: hexDecode("fbc010666666666666"), values: []interface{}{float64(-4.1)}},
// More testcases not covered by https://tools.ietf.org/html/rfc7049#appendix-A.
{
wantData: hexDecode("d83dd183010203"), // 61(17([1, 2, 3])), nested tags 61 and 17
values: []interface{}{
Tag{61, Tag{17, []interface{}{uint64(1), uint64(2), uint64(3)}}},
RawTag{61, hexDecode("d183010203")},
},
},
{wantData: hexDecode("83f6f6f6"), values: []interface{}{[]interface{}{nil, nil, nil}}}, // [nil, nil, nil]
}
func TestMarshal(t *testing.T) {
testMarshal(t, marshalTests)
}
func TestInvalidTypeMarshal(t *testing.T) {
type s1 struct {
Chan chan bool
}
type s2 struct {
_ struct{} `cbor:",toarray"`
Chan chan bool
}
var marshalErrorTests = []marshalErrorTest{
{"channel cannot be marshaled", make(chan bool), "cbor: unsupported type: chan bool"},
{"slice of channel cannot be marshaled", make([]chan bool, 10), "cbor: unsupported type: []chan bool"},
{"slice of pointer to channel cannot be marshaled", make([]*chan bool, 10), "cbor: unsupported type: []*chan bool"},
{"map of channel cannot be marshaled", make(map[string]chan bool), "cbor: unsupported type: map[string]chan bool"},
{"struct of channel cannot be marshaled", s1{}, "cbor: unsupported type: cbor.s1"},
{"struct of channel cannot be marshaled", s2{}, "cbor: unsupported type: cbor.s2"},
{"function cannot be marshaled", func(i int) int { return i * i }, "cbor: unsupported type: func(int) int"},
{"complex cannot be marshaled", complex(100, 8), "cbor: unsupported type: complex128"},
}
em, err := EncOptions{Sort: SortCanonical}.EncMode()
if err != nil {
t.Errorf("EncMode() returned an error %v", err)
}
for _, tc := range marshalErrorTests {
t.Run(tc.name, func(t *testing.T) {
v := tc.value
b, err := Marshal(&v)
if err == nil {
t.Errorf("Marshal(%v) didn't return an error, want error %q", tc.value, tc.wantErrorMsg)
} else if _, ok := err.(*UnsupportedTypeError); !ok {
t.Errorf("Marshal(%v) error type %T, want *UnsupportedTypeError", tc.value, err)
} else if err.Error() != tc.wantErrorMsg {
t.Errorf("Marshal(%v) error %q, want %q", tc.value, err.Error(), tc.wantErrorMsg)
} else if b != nil {
t.Errorf("Marshal(%v) = 0x%x, want nil", tc.value, b)
}
v = tc.value
b, err = em.Marshal(&v)
if err == nil {
t.Errorf("Marshal(%v) didn't return an error, want error %q", tc.value, tc.wantErrorMsg)
} else if _, ok := err.(*UnsupportedTypeError); !ok {
t.Errorf("Marshal(%v) error type %T, want *UnsupportedTypeError", tc.value, err)
} else if err.Error() != tc.wantErrorMsg {
t.Errorf("Marshal(%v) error %q, want %q", tc.value, err.Error(), tc.wantErrorMsg)
} else if b != nil {
t.Errorf("Marshal(%v) = 0x%x, want nil", tc.value, b)
}
})
}
}
func TestMarshalLargeByteString(t *testing.T) {
// []byte{100, 100, 100, ...}
lengths := []int{0, 1, 2, 22, 23, 24, 254, 255, 256, 65534, 65535, 65536, 10000000}
tests := make([]marshalTest, len(lengths))
for i, length := range lengths {
data := bytes.NewBuffer(encodeCborHeader(cborTypeByteString, uint64(length)))
value := make([]byte, length)
for j := 0; j < length; j++ {
data.WriteByte(100)
value[j] = 100
}
tests[i] = marshalTest{data.Bytes(), []interface{}{value}}
}
testMarshal(t, tests)
}
func TestMarshalLargeTextString(t *testing.T) {
// "ddd..."
lengths := []int{0, 1, 2, 22, 23, 24, 254, 255, 256, 65534, 65535, 65536, 10000000}
tests := make([]marshalTest, len(lengths))
for i, length := range lengths {
data := bytes.NewBuffer(encodeCborHeader(cborTypeTextString, uint64(length)))
value := make([]byte, length)
for j := 0; j < length; j++ {
data.WriteByte(100)
value[j] = 100
}
tests[i] = marshalTest{data.Bytes(), []interface{}{string(value)}}
}
testMarshal(t, tests)
}
func TestMarshalLargeArray(t *testing.T) {
// []string{"水", "水", "水", ...}
lengths := []int{0, 1, 2, 22, 23, 24, 254, 255, 256, 65534, 65535, 65536, 131072}
tests := make([]marshalTest, len(lengths))
for i, length := range lengths {
data := bytes.NewBuffer(encodeCborHeader(cborTypeArray, uint64(length)))
value := make([]string, length)
for j := 0; j < length; j++ {
data.Write([]byte{0x63, 0xe6, 0xb0, 0xb4})
value[j] = "水"
}
tests[i] = marshalTest{data.Bytes(), []interface{}{value}}
}
testMarshal(t, tests)
}
func TestMarshalLargeMapCanonical(t *testing.T) {
// map[int]int {0:0, 1:1, 2:2, ...}
lengths := []int{0, 1, 2, 22, 23, 24, 254, 255, 256, 65534, 65535, 65536, 131072}
tests := make([]marshalTest, len(lengths))
for i, length := range lengths {
data := bytes.NewBuffer(encodeCborHeader(cborTypeMap, uint64(length)))
value := make(map[int]int, length)
for j := 0; j < length; j++ {
d := encodeCborHeader(cborTypePositiveInt, uint64(j))
data.Write(d)
data.Write(d)
value[j] = j
}
tests[i] = marshalTest{data.Bytes(), []interface{}{value}}
}
testMarshal(t, tests)
}
func TestMarshalLargeMap(t *testing.T) {
// map[int]int {0:0, 1:1, 2:2, ...}
lengths := []int{0, 1, 2, 22, 23, 24, 254, 255, 256, 65534, 65535, 65536, 131072}
for _, length := range lengths {
m1 := make(map[int]int, length)
for i := 0; i < length; i++ {
m1[i] = i
}
data, err := Marshal(m1)
if err != nil {
t.Fatalf("Marshal(%v) returned error %v", m1, err)
}
m2 := make(map[int]int)
if err = Unmarshal(data, &m2); err != nil {
t.Fatalf("Unmarshal(0x%x) returned error %v", data, err)
}
if !reflect.DeepEqual(m1, m2) {
t.Errorf("Unmarshal() = %v, want %v", m2, m1)
}
}
}
func encodeCborHeader(t cborType, n uint64) []byte {
if n <= maxAdditionalInformationWithoutArgument {
const headSize = 1
var b [headSize]byte
b[0] = byte(t) | byte(n)
return b[:]
}
if n <= math.MaxUint8 {
const argumentSize = 1
const headSize = 1 + argumentSize
var b [headSize]byte
b[0] = byte(t) | additionalInformationWith1ByteArgument
b[1] = byte(n)
return b[:]
}
if n <= math.MaxUint16 {
const argumentSize = 2
const headSize = 1 + argumentSize
var b [headSize]byte
b[0] = byte(t) | additionalInformationWith2ByteArgument
binary.BigEndian.PutUint16(b[1:], uint16(n))
return b[:]
}
if n <= math.MaxUint32 {
const argumentSize = 4
const headSize = 1 + argumentSize
var b [headSize]byte
b[0] = byte(t) | additionalInformationWith4ByteArgument
binary.BigEndian.PutUint32(b[1:], uint32(n))
return b[:]
}
const argumentSize = 8
const headSize = 1 + argumentSize
var b [headSize]byte
b[0] = byte(t) | additionalInformationWith8ByteArgument
binary.BigEndian.PutUint64(b[1:], n)
return b[:]
}
func testMarshal(t *testing.T, testCases []marshalTest) {
em, err := EncOptions{Sort: SortCanonical}.EncMode()
if err != nil {
t.Errorf("EncMode() returned an error %v", err)
}
bem, err := EncOptions{Sort: SortCanonical}.UserBufferEncMode()
if err != nil {
t.Errorf("UserBufferEncMode() returned an error %v", err)
}
for _, tc := range testCases {
for _, value := range tc.values {
// Encode value using default options
if _, err := Marshal(value); err != nil {
t.Errorf("Marshal(%v) returned error %v", value, err)
}
// Encode value to provided buffer using default options
var buf1 bytes.Buffer
if err := MarshalToBuffer(value, &buf1); err != nil {
t.Errorf("MarshalToBuffer(%v) returned error %v", value, err)
}
// Encode value using specified options
if b, err := em.Marshal(value); err != nil {
t.Errorf("Marshal(%v) returned error %v", value, err)
} else if !bytes.Equal(b, tc.wantData) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", value, b, tc.wantData)
}
// Encode value to provided buffer using specified options
var buf2 bytes.Buffer
if err := bem.MarshalToBuffer(value, &buf2); err != nil {
t.Errorf("MarshalToBuffer(%v) returned error %v", value, err)
} else if !bytes.Equal(buf2.Bytes(), tc.wantData) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", value, buf2.Bytes(), tc.wantData)
}
}
r := RawMessage(tc.wantData)
if b, err := Marshal(r); err != nil {
t.Errorf("Marshal(%v) returned error %v", r, err)
} else if !bytes.Equal(b, r) {
t.Errorf("Marshal(%v) returned %v, want %v", r, b, r)
}
}
}
type inner struct {
X, Y, z int64
}
type outer struct {
IntField int
FloatField float32
BoolField bool
StringField string
ByteStringField []byte
ArrayField []string
MapField map[string]bool
NestedStructField *inner
unexportedField int64
}
func TestMarshalStruct(t *testing.T) {
v1 := outer{
IntField: 123,
FloatField: 100000.0,
BoolField: true,
StringField: "test",
ByteStringField: []byte{1, 3, 5},
ArrayField: []string{"hello", "world"},
MapField: map[string]bool{"afternoon": false, "morning": true},
NestedStructField: &inner{X: 1000, Y: 1000000, z: 10000000},
unexportedField: 6,
}
unmarshalWant := outer{
IntField: 123,
FloatField: 100000.0,
BoolField: true,
StringField: "test",
ByteStringField: []byte{1, 3, 5},
ArrayField: []string{"hello", "world"},
MapField: map[string]bool{"afternoon": false, "morning": true},
NestedStructField: &inner{X: 1000, Y: 1000000},
}
data, err := Marshal(v1)
if err != nil {
t.Fatalf("Marshal(%v) returned error %v", v1, err)
}
var v2 outer
if err = Unmarshal(data, &v2); err != nil {
t.Fatalf("Unmarshal(0x%x) returned error %v", data, err)
}
if !reflect.DeepEqual(unmarshalWant, v2) {
t.Errorf("Unmarshal() = %v, want %v", v2, unmarshalWant)
}
}
// TestMarshalStructVariableLength tests marshaling structs that can encode to CBOR maps of varying
// size depending on their field contents.
func TestMarshalStructVariableLength(t *testing.T) {
for _, tc := range []struct {
name string
in interface{}
want []byte
}{
{
name: "zero out of one items",
in: struct {
F int `cbor:",omitempty"`
}{},
want: hexDecode("a0"),
},
{
name: "one out of one items",
in: struct {
F int `cbor:",omitempty"`
}{F: 1},
want: hexDecode("a1614601"),
},
{
name: "23 out of 24 items",
in: struct {
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W int
X int `cbor:",omitempty"`
}{},
want: hexDecode("b7614100614200614300614400614500614600614700614800614900614a00614b00614c00614d00614e00614f00615000615100615200615300615400615500615600615700"),
},
{
name: "24 out of 24 items",
in: struct {
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W int
X int `cbor:",omitempty"`
}{X: 1},
want: hexDecode("b818614100614200614300614400614500614600614700614800614900614a00614b00614c00614d00614e00614f00615000615100615200615300615400615500615600615700615801"),
},
} {
t.Run(tc.name, func(t *testing.T) {
got, err := Marshal(tc.in)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(tc.want, got) {
t.Errorf("want 0x%x but got 0x%x", tc.want, got)
}
})
}
}
func TestMarshalStructCanonical(t *testing.T) {
v := outer{
IntField: 123,
FloatField: 100000.0,
BoolField: true,
StringField: "test",
ByteStringField: []byte{1, 3, 5},
ArrayField: []string{"hello", "world"},
MapField: map[string]bool{"afternoon": false, "morning": true},
NestedStructField: &inner{X: 1000, Y: 1000000, z: 10000000},
unexportedField: 6,
}
var data bytes.Buffer
data.WriteByte(byte(cborTypeMap) | 8) // CBOR header: map type with 8 items (exported fields)
data.WriteByte(byte(cborTypeTextString) | 8) // "IntField"
data.WriteString("IntField")
data.WriteByte(byte(cborTypePositiveInt) | 24)
data.WriteByte(123)
data.WriteByte(byte(cborTypeTextString) | 8) // "MapField"
data.WriteString("MapField")
data.WriteByte(byte(cborTypeMap) | 2)
data.WriteByte(byte(cborTypeTextString) | 7)
data.WriteString("morning")
data.WriteByte(byte(cborTypePrimitives) | 21)
data.WriteByte(byte(cborTypeTextString) | 9)
data.WriteString("afternoon")
data.WriteByte(byte(cborTypePrimitives) | 20)
data.WriteByte(byte(cborTypeTextString) | 9) // "BoolField"
data.WriteString("BoolField")
data.WriteByte(byte(cborTypePrimitives) | 21)
data.WriteByte(byte(cborTypeTextString) | 10) // "ArrayField"
data.WriteString("ArrayField")
data.WriteByte(byte(cborTypeArray) | 2)
data.WriteByte(byte(cborTypeTextString) | 5)
data.WriteString("hello")
data.WriteByte(byte(cborTypeTextString) | 5)
data.WriteString("world")
data.WriteByte(byte(cborTypeTextString) | 10) // "FloatField"
data.WriteString("FloatField")
data.Write([]byte{0xfa, 0x47, 0xc3, 0x50, 0x00})
data.WriteByte(byte(cborTypeTextString) | 11) // "StringField"
data.WriteString("StringField")
data.WriteByte(byte(cborTypeTextString) | 4)
data.WriteString("test")
data.WriteByte(byte(cborTypeTextString) | 15) // "ByteStringField"
data.WriteString("ByteStringField")
data.WriteByte(byte(cborTypeByteString) | 3)
data.Write([]byte{1, 3, 5})
data.WriteByte(byte(cborTypeTextString) | 17) // "NestedStructField"
data.WriteString("NestedStructField")
data.WriteByte(byte(cborTypeMap) | 2)
data.WriteByte(byte(cborTypeTextString) | 1)
data.WriteString("X")
data.WriteByte(byte(cborTypePositiveInt) | 25)
b := make([]byte, 2)
binary.BigEndian.PutUint16(b, uint16(1000))
data.Write(b)
data.WriteByte(byte(cborTypeTextString) | 1)
data.WriteString("Y")
data.WriteByte(byte(cborTypePositiveInt) | 26)
b = make([]byte, 4)
binary.BigEndian.PutUint32(b, uint32(1000000))
data.Write(b)
em, err := EncOptions{Sort: SortCanonical}.EncMode()
if err != nil {
t.Errorf("EncMode() returned an error %q", err)
}
if b, err := em.Marshal(v); err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, data.Bytes()) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, data.Bytes())
}
}
func TestMarshalNullPointerToEmbeddedStruct(t *testing.T) {
type (
T1 struct {
X int
}
T2 struct {
*T1
}
)
v := T2{}
wantCborData := []byte{0xa0} // {}
data, err := Marshal(v)
if err != nil {
t.Fatalf("Marshal(%v) returned error %v", v, err)
}
if !bytes.Equal(wantCborData, data) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, data, wantCborData)
}
}
func TestMarshalNullPointerToStruct(t *testing.T) {
type (
T1 struct {
X int
}
T2 struct {
T *T1
}
)
v := T2{}
wantCborData := []byte{0xa1, 0x61, 0x54, 0xf6} // {X: nil}
data, err := Marshal(v)
if err != nil {
t.Fatalf("Marshal(%v) returned error %v", v, err)
}
if !bytes.Equal(wantCborData, data) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, data, wantCborData)
}
}
// Struct fields encoding follows the same struct fields visibility
// rules used by JSON encoding package. Some struct types are from
// tests in JSON encoding package to ensure that the same rules are
// followed.
func TestAnonymousFields1(t *testing.T) {
// Fields (T1.X, T2.X) with the same name at the same level are ignored
type (
T1 struct{ x, X int }
T2 struct{ x, X int }
T struct {
T1
T2
}
)
v := T{T1{1, 2}, T2{3, 4}}
want := []byte{0xa0} // {}
b, err := Marshal(v)
if err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, want) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, want)
}
}
func TestAnonymousFields2(t *testing.T) {
// Field (T.X) with the same name at a less nested level is serialized
type (
T1 struct{ x, X int }
T2 struct{ x, X int }
T struct {
T1
T2
x, X int
}
)
v := T{T1{1, 2}, T2{3, 4}, 5, 6}
want := []byte{0xa1, 0x61, 0x58, 0x06} // {X:6}
b, err := Marshal(v)
if err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, want) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, want)
}
var v2 T
unmarshalWant := T{X: 6}
if err := Unmarshal(b, &v2); err != nil {
t.Errorf("Unmarshal(0x%x) returned error %v", b, err)
} else if !reflect.DeepEqual(v2, unmarshalWant) {
t.Errorf("Unmarshal(0x%x) = %v (%T), want %v (%T)", b, v2, v2, unmarshalWant, unmarshalWant)
}
}
func TestAnonymousFields3(t *testing.T) {
// Unexported embedded field (myInt) of non-struct type is ignored
type (
myInt int
T struct {
myInt
}
)
v := T{5}
want := []byte{0xa0} // {}
b, err := Marshal(v)
if err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, want) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, want)
}
}
func TestAnonymousFields4(t *testing.T) {
// Exported embedded field (MyInt) of non-struct type is serialized
type (
MyInt int
T struct {
MyInt
}
)
v := T{5}
want := []byte{0xa1, 0x65, 0x4d, 0x79, 0x49, 0x6e, 0x74, 0x05} // {MyInt: 5}
b, err := Marshal(v)
if err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, want) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, want)
}
var v2 T
if err = Unmarshal(b, &v2); err != nil {
t.Errorf("Unmarshal(0x%x) returned error %v", b, err)
} else if !reflect.DeepEqual(v, v2) {
t.Errorf("Unmarshal(0x%x) = %v (%T), want %v (%T)", b, v, v, v2, v2)
}
}
func TestAnonymousFields5(t *testing.T) {
// Unexported embedded field (*myInt) of pointer to non-struct type is ignored
type (
myInt int
T struct {
*myInt
}
)
v := T{new(myInt)}
*v.myInt = 5
want := []byte{0xa0} // {}
b, err := Marshal(v)
if err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, want) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, want)
}
}
func TestAnonymousFields6(t *testing.T) {
// Exported embedded field (*MyInt) of pointer to non-struct type should be serialized
type (
MyInt int
T struct {
*MyInt
}
)
v := T{new(MyInt)}
*v.MyInt = 5
want := []byte{0xa1, 0x65, 0x4d, 0x79, 0x49, 0x6e, 0x74, 0x05} // {MyInt: 5}
b, err := Marshal(v)
if err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, want) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, want)
}
var v2 T
if err = Unmarshal(b, &v2); err != nil {
t.Errorf("Unmarshal(0x%x) returned error %v", b, err)
} else if !reflect.DeepEqual(v, v2) {
t.Errorf("Unmarshal(0x%x) = %v (%T), want %v (%T)", b, v, v, v2, v2)
}
}
func TestAnonymousFields7(t *testing.T) {
// Exported fields (t1.X, T2.Y) of embedded structs should have their exported fields be serialized
type (
t1 struct{ x, X int }
T2 struct{ y, Y int }
T struct {
t1
T2
}
)
v := T{t1{1, 2}, T2{3, 4}}
want := []byte{0xa2, 0x61, 0x58, 0x02, 0x61, 0x59, 0x04} // {X:2, Y:4}
b, err := Marshal(v)
if err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, want) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, want)
}
var v2 T
unmarshalWant := T{t1{X: 2}, T2{Y: 4}}
if err = Unmarshal(b, &v2); err != nil {
t.Errorf("Unmarshal(0x%x) returned error %v", b, err)
} else if !reflect.DeepEqual(v2, unmarshalWant) {
t.Errorf("Unmarshal(0x%x) = %v (%T), want %v (%T)", b, v2, v2, unmarshalWant, unmarshalWant)
}
}
func TestAnonymousFields8(t *testing.T) {
// Exported fields of pointers (t1.X, T2.Y)
type (
t1 struct{ x, X int }
T2 struct{ y, Y int }
T struct {
*t1
*T2
}
)
v := T{&t1{1, 2}, &T2{3, 4}}
want := []byte{0xa2, 0x61, 0x58, 0x02, 0x61, 0x59, 0x04} // {X:2, Y:4}
b, err := Marshal(v)
if err != nil {
t.Errorf("Marshal(%v) returned error %v", v, err)
} else if !bytes.Equal(b, want) {
t.Errorf("Marshal(%v) = 0x%x, want 0x%x", v, b, want)
}
// v1 cannot be unmarshaled to because reflect cannot allocate unexported field s1.
var v1 T
wantErrorMsg := "cannot set embedded pointer to unexported struct"
wantV := T{T2: &T2{Y: 4}}
err = Unmarshal(b, &v1)
if err == nil {
t.Errorf("Unmarshal(0x%x) didn't return an error, want error %q", b, wantErrorMsg)
} else if !strings.Contains(err.Error(), wantErrorMsg) {
t.Errorf("Unmarshal(0x%x) returned error %q, want error %q", b, err.Error(), wantErrorMsg)
}
if !reflect.DeepEqual(v1, wantV) {
t.Errorf("Unmarshal(0x%x) = %+v (%T), want %+v (%T)", b, v1, v1, wantV, wantV)
}
// v2 can be unmarshaled to because unexported field t1 is already allocated.
var v2 T
v2.t1 = &t1{}
unmarshalWant := T{&t1{X: 2}, &T2{Y: 4}}
if err = Unmarshal(b, &v2); err != nil {
t.Errorf("Unmarshal(0x%x) returned error %v", b, err)
} else if !reflect.DeepEqual(v2, unmarshalWant) {
t.Errorf("Unmarshal(0x%x) = %v (%T), want %v (%T)", b, v2, v2, unmarshalWant, unmarshalWant)
}
}
func TestAnonymousFields9(t *testing.T) {
// Multiple levels of nested anonymous fields
type (
MyInt1 int
MyInt2 int
myInt int
t2 struct {
MyInt2
myInt
}
t1 struct {
MyInt1
myInt
t2
}
T struct {
t1
myInt