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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 (
"io"
"strings"
"testing"
)
func TestByteString(t *testing.T) {
type s1 struct {
A ByteString `cbor:"a"`
}
type s2 struct {
A *ByteString `cbor:"a"`
}
type s3 struct {
A ByteString `cbor:"a,omitempty"`
}
type s4 struct {
A *ByteString `cbor:"a,omitempty"`
}
emptybs := ByteString("")
bs := ByteString("\x01\x02\x03\x04")
testCases := []roundTripTest{
{
name: "empty",
obj: emptybs,
wantCborData: mustHexDecode("40"),
},
{
name: "not empty",
obj: bs,
wantCborData: mustHexDecode("4401020304"),
},
{
name: "array",
obj: []ByteString{bs},
wantCborData: mustHexDecode("814401020304"),
},
{
name: "map with ByteString key",
obj: map[ByteString]bool{bs: true},
wantCborData: mustHexDecode("a14401020304f5"),
},
{
name: "empty ByteString field",
obj: s1{},
wantCborData: mustHexDecode("a1616140"),
},
{
name: "not empty ByteString field",
obj: s1{A: bs},
wantCborData: mustHexDecode("a161614401020304"),
},
{
name: "nil *ByteString field",
obj: s2{},
wantCborData: mustHexDecode("a16161f6"),
},
{
name: "empty *ByteString field",
obj: s2{A: &emptybs},
wantCborData: mustHexDecode("a1616140"),
},
{
name: "not empty *ByteString field",
obj: s2{A: &bs},
wantCborData: mustHexDecode("a161614401020304"),
},
{
name: "empty ByteString field with omitempty option",
obj: s3{},
wantCborData: mustHexDecode("a0"),
},
{
name: "not empty ByteString field with omitempty option",
obj: s3{A: bs},
wantCborData: mustHexDecode("a161614401020304"),
},
{
name: "nil *ByteString field with omitempty option",
obj: s4{},
wantCborData: mustHexDecode("a0"),
},
{
name: "empty *ByteString field with omitempty option",
obj: s4{A: &emptybs},
wantCborData: mustHexDecode("a1616140"),
},
{
name: "not empty *ByteString field with omitempty option",
obj: s4{A: &bs},
wantCborData: mustHexDecode("a161614401020304"),
},
}
em, _ := EncOptions{}.EncMode()
dm, _ := DecOptions{}.DecMode()
testRoundTrip(t, testCases, em, dm)
}
func TestUnmarshalByteStringOnBadData(t *testing.T) {
testCases := []struct {
name string
data []byte
errMsg string
}{
// Empty data
{
name: "nil data",
data: nil,
errMsg: io.EOF.Error(),
},
{
name: "empty data",
data: []byte{},
errMsg: io.EOF.Error(),
},
// Wrong CBOR types
{
name: "uint type",
data: mustHexDecode("01"),
errMsg: "cbor: cannot unmarshal positive integer into Go value of type cbor.ByteString",
},
{
name: "int type",
data: mustHexDecode("20"),
errMsg: "cbor: cannot unmarshal negative integer into Go value of type cbor.ByteString",
},
{
name: "string type",
data: mustHexDecode("60"),
errMsg: "cbor: cannot unmarshal UTF-8 text string into Go value of type cbor.ByteString",
},
{
name: "array type",
data: mustHexDecode("80"),
errMsg: "cbor: cannot unmarshal array into Go value of type cbor.ByteString",
},
{
name: "map type",
data: mustHexDecode("a0"),
errMsg: "cbor: cannot unmarshal map into Go value of type cbor.ByteString",
},
{
name: "tag type",
data: mustHexDecode("c074323031332d30332d32315432303a30343a30305a"),
errMsg: "cbor: cannot unmarshal tag into Go value of type cbor.ByteString",
},
{
name: "float type",
data: mustHexDecode("f90000"),
errMsg: "cbor: cannot unmarshal primitives into Go value of type cbor.ByteString",
},
// Truncated CBOR data
{
name: "truncated head",
data: mustHexDecode("18"),
errMsg: io.ErrUnexpectedEOF.Error(),
},
// Truncated CBOR byte string
{
name: "truncated byte string",
data: mustHexDecode("44010203"),
errMsg: io.ErrUnexpectedEOF.Error(),
},
// Extraneous CBOR data
{
name: "extraneous data",
data: mustHexDecode("c074323031332d30332d32315432303a30343a30305a00"),
errMsg: "cbor: 1 bytes of extraneous data starting at index 22",
},
}
for _, tc := range testCases {
t.Run(tc.name, func(t *testing.T) {
// Test ByteString.UnmarshalCBOR(data)
{
var v ByteString
err := v.UnmarshalCBOR(tc.data)
if err == nil {
t.Errorf("UnmarshalCBOR(%x) didn't return error", tc.data)
}
if !strings.HasPrefix(err.Error(), tc.errMsg) {
t.Errorf("UnmarshalCBOR(%x) returned error %q, want %q", tc.data, err.Error(), tc.errMsg)
}
}
// Test Unmarshal(data, *ByteString), which calls ByteString.unmarshalCBOR() under the hood
{
var v ByteString
err := Unmarshal(tc.data, &v)
if err == nil {
t.Errorf("Unmarshal(%x) didn't return error", tc.data)
}
if !strings.HasPrefix(err.Error(), tc.errMsg) {
t.Errorf("Unmarshal(%x) returned error %q, want %q", tc.data, err.Error(), tc.errMsg)
}
}
})
}
}
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