// Copyright 2016 The go-ethereum Authors
// This file is part of the go-ethereum library.
//
// The go-ethereum library is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
package hexutil
import (
"bytes"
"encoding/hex"
"encoding/json"
"errors"
"math/big"
"testing"
)
func checkError(t *testing.T, input string, got, want error) bool {
if got == nil {
if want != nil {
t.Errorf("input %s: got no error, want %q", input, want)
return false
}
return true
}
if want == nil {
t.Errorf("input %s: unexpected error %q", input, got)
} else if got.Error() != want.Error() {
t.Errorf("input %s: got error %q, want %q", input, got, want)
}
return false
}
func referenceBig(s string) *big.Int {
b, ok := new(big.Int).SetString(s, 16)
if !ok {
panic("invalid")
}
return b
}
func referenceBytes(s string) []byte {
b, err := hex.DecodeString(s)
if err != nil {
panic(err)
}
return b
}
var errJSONEOF = errors.New("unexpected end of JSON input")
var unmarshalBytesTests = []unmarshalTest{
// invalid encoding
{input: "", wantErr: errJSONEOF},
{input: "null", wantErr: errNonString},
{input: "10", wantErr: errNonString},
{input: `"0"`, wantErr: ErrMissingPrefix},
{input: `"0x0"`, wantErr: ErrOddLength},
{input: `"0xxx"`, wantErr: ErrSyntax},
{input: `"0x01zz01"`, wantErr: ErrSyntax},
// valid encoding
{input: `""`, want: referenceBytes("")},
{input: `"0x"`, want: referenceBytes("")},
{input: `"0x02"`, want: referenceBytes("02")},
{input: `"0X02"`, want: referenceBytes("02")},
{input: `"0xffffffffff"`, want: referenceBytes("ffffffffff")},
{
input: `"0xffffffffffffffffffffffffffffffffffff"`,
want: referenceBytes("ffffffffffffffffffffffffffffffffffff"),
},
}
func TestUnmarshalBytes(t *testing.T) {
for _, test := range unmarshalBytesTests {
var v Bytes
err := json.Unmarshal([]byte(test.input), &v)
if !checkError(t, test.input, err, test.wantErr) {
continue
}
if !bytes.Equal(test.want.([]byte), []byte(v)) {
t.Errorf("input %s: value mismatch: got %x, want %x", test.input, &v, test.want)
continue
}
}
}
func BenchmarkUnmarshalBytes(b *testing.B) {
input := []byte(`"0x123456789abcdef123456789abcdef"`)
for i := 0; i < b.N; i++ {
var v Bytes
if err := v.UnmarshalJSON(input); err != nil {
b.Fatal(err)
}
}
}
func TestMarshalBytes(t *testing.T) {
for _, test := range encodeBytesTests {
in := test.input.([]byte)
out, err := json.Marshal(Bytes(in))
if err != nil {
t.Errorf("%x: %v", in, err)
continue
}
if want := `"` + test.want + `"`; string(out) != want {
t.Errorf("%x: MarshalJSON output mismatch: got %q, want %q", in, out, want)
continue
}
if out := Bytes(in).String(); out != test.want {
t.Errorf("%x: String mismatch: got %q, want %q", in, out, test.want)
continue
}
}
}
var unmarshalBigTests = []unmarshalTest{
// invalid encoding
{input: "", wantErr: errJSONEOF},
{input: "null", wantErr: errNonString},
{input: "10", wantErr: errNonString},
{input: `"0"`, wantErr: ErrMissingPrefix},
{input: `"0x"`, wantErr: ErrEmptyNumber},
{input: `"0x01"`, wantErr: ErrLeadingZero},
{input: `"0xx"`, wantErr: ErrSyntax},
{input: `"0x1zz01"`, wantErr: ErrSyntax},
{
input: `"0x10000000000000000000000000000000000000000000000000000000000000000"`,
wantErr: ErrBig256Range,
},
// valid encoding
{input: `""`, want: big.NewInt(0)},
{input: `"0x0"`, want: big.NewInt(0)},
{input: `"0x2"`, want: big.NewInt(0x2)},
{input: `"0x2F2"`, want: big.NewInt(0x2f2)},
{input: `"0X2F2"`, want: big.NewInt(0x2f2)},
{input: `"0x1122aaff"`, want: big.NewInt(0x1122aaff)},
{input: `"0xbBb"`, want: big.NewInt(0xbbb)},
{input: `"0xfffffffff"`, want: big.NewInt(0xfffffffff)},
{
input: `"0x112233445566778899aabbccddeeff"`,
want: referenceBig("112233445566778899aabbccddeeff"),
},
{
input: `"0xffffffffffffffffffffffffffffffffffff"`,
want: referenceBig("ffffffffffffffffffffffffffffffffffff"),
},
{
input: `"0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"`,
want: referenceBig("ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff"),
},
}
func TestUnmarshalBig(t *testing.T) {
for _, test := range unmarshalBigTests {
var v Big
err := json.Unmarshal([]byte(test.input), &v)
if !checkError(t, test.input, err, test.wantErr) {
continue
}
if test.want != nil && test.want.(*big.Int).Cmp((*big.Int)(&v)) != 0 {
t.Errorf("input %s: value mismatch: got %x, want %x", test.input, (*big.Int)(&v), test.want)
continue
}
}
}
func BenchmarkUnmarshalBig(b *testing.B) {
input := []byte(`"0x123456789abcdef123456789abcdef"`)
for i := 0; i < b.N; i++ {
var v Big
if err := v.UnmarshalJSON(input); err != nil {
b.Fatal(err)
}
}
}
func TestMarshalBig(t *testing.T) {
for _, test := range encodeBigTests {
in := test.input.(*big.Int)
out, err := json.Marshal((*Big)(in))
if err != nil {
t.Errorf("%d: %v", in, err)
continue
}
if want := `"` + test.want + `"`; string(out) != want {
t.Errorf("%d: MarshalJSON output mismatch: got %q, want %q", in, out, want)
continue
}
if out := (*Big)(in).String(); out != test.want {
t.Errorf("%x: String mismatch: got %q, want %q", in, out, test.want)
continue
}
}
}
var unmarshalUint64Tests = []unmarshalTest{
// invalid encoding
{input: "", wantErr: errJSONEOF},
{input: "null", wantErr: errNonString},
{input: "10", wantErr: errNonString},
{input: `"0"`, wantErr: ErrMissingPrefix},
{input: `"0x"`, wantErr: ErrEmptyNumber},
{input: `"0x01"`, wantErr: ErrLeadingZero},
{input: `"0xfffffffffffffffff"`, wantErr: ErrUint64Range},
{input: `"0xx"`, wantErr: ErrSyntax},
{input: `"0x1zz01"`, wantErr: ErrSyntax},
// valid encoding
{input: `""`, want: uint64(0)},
{input: `"0x0"`, want: uint64(0)},
{input: `"0x2"`, want: uint64(0x2)},
{input: `"0x2F2"`, want: uint64(0x2f2)},
{input: `"0X2F2"`, want: uint64(0x2f2)},
{input: `"0x1122aaff"`, want: uint64(0x1122aaff)},
{input: `"0xbbb"`, want: uint64(0xbbb)},
{input: `"0xffffffffffffffff"`, want: uint64(0xffffffffffffffff)},
}
func TestUnmarshalUint64(t *testing.T) {
for _, test := range unmarshalUint64Tests {
var v Uint64
err := json.Unmarshal([]byte(test.input), &v)
if !checkError(t, test.input, err, test.wantErr) {
continue
}
if uint64(v) != test.want.(uint64) {
t.Errorf("input %s: value mismatch: got %d, want %d", test.input, v, test.want)
continue
}
}
}
func BenchmarkUnmarshalUint64(b *testing.B) {
input := []byte(`"0x123456789abcdf"`)
for i := 0; i < b.N; i++ {
var v Uint64
v.UnmarshalJSON(input)
}
}
func TestMarshalUint64(t *testing.T) {
for _, test := range encodeUint64Tests {
in := test.input.(uint64)
out, err := json.Marshal(Uint64(in))
if err != nil {
t.Errorf("%d: %v", in, err)
continue
}
if want := `"` + test.want + `"`; string(out) != want {
t.Errorf("%d: MarshalJSON output mismatch: got %q, want %q", in, out, want)
continue
}
if out := (Uint64)(in).String(); out != test.want {
t.Errorf("%x: String mismatch: got %q, want %q", in, out, test.want)
continue
}
}
}
func TestMarshalUint(t *testing.T) {
for _, test := range encodeUintTests {
in := test.input.(uint)
out, err := json.Marshal(Uint(in))
if err != nil {
t.Errorf("%d: %v", in, err)
continue
}
if want := `"` + test.want + `"`; string(out) != want {
t.Errorf("%d: MarshalJSON output mismatch: got %q, want %q", in, out, want)
continue
}
if out := (Uint)(in).String(); out != test.want {
t.Errorf("%x: String mismatch: got %q, want %q", in, out, test.want)
continue
}
}
}
var (
// These are variables (not constants) to avoid constant overflow
// checks in the compiler on 32bit platforms.
maxUint33bits = uint64(^uint32(0)) + 1
maxUint64bits = ^uint64(0)
)
var unmarshalUintTests = []unmarshalTest{
// invalid encoding
{input: "", wantErr: errJSONEOF},
{input: "null", wantErr: errNonString},
{input: "10", wantErr: errNonString},
{input: `"0"`, wantErr: ErrMissingPrefix},
{input: `"0x"`, wantErr: ErrEmptyNumber},
{input: `"0x01"`, wantErr: ErrLeadingZero},
{input: `"0x100000000"`, want: uint(maxUint33bits), wantErr32bit: ErrUintRange},
{input: `"0xfffffffffffffffff"`, wantErr: ErrUintRange},
{input: `"0xx"`, wantErr: ErrSyntax},
{input: `"0x1zz01"`, wantErr: ErrSyntax},
// valid encoding
{input: `""`, want: uint(0)},
{input: `"0x0"`, want: uint(0)},
{input: `"0x2"`, want: uint(0x2)},
{input: `"0x2F2"`, want: uint(0x2f2)},
{input: `"0X2F2"`, want: uint(0x2f2)},
{input: `"0x1122aaff"`, want: uint(0x1122aaff)},
{input: `"0xbbb"`, want: uint(0xbbb)},
{input: `"0xffffffff"`, want: uint(0xffffffff)},
{input: `"0xffffffffffffffff"`, want: uint(maxUint64bits), wantErr32bit: ErrUintRange},
}
func TestUnmarshalUint(t *testing.T) {
for _, test := range unmarshalUintTests {
var v Uint
err := json.Unmarshal([]byte(test.input), &v)
if uintBits == 32 && test.wantErr32bit != nil {
checkError(t, test.input, err, test.wantErr32bit)
continue
}
if !checkError(t, test.input, err, test.wantErr) {
continue
}
if uint(v) != test.want.(uint) {
t.Errorf("input %s: value mismatch: got %d, want %d", test.input, v, test.want)
continue
}
}
}
func TestUnmarshalFixedUnprefixedText(t *testing.T) {
tests := []struct {
input string
want []byte
wantErr error
}{
{input: "0x2", wantErr: ErrOddLength},
{input: "2", wantErr: ErrOddLength},
{input: "4444", wantErr: errors.New("hex string has length 4, want 8 for x")},
{input: "4444", wantErr: errors.New("hex string has length 4, want 8 for x")},
// check that output is not modified for partially correct input
{input: "444444gg", wantErr: ErrSyntax, want: []byte{0, 0, 0, 0}},
{input: "0x444444gg", wantErr: ErrSyntax, want: []byte{0, 0, 0, 0}},
// valid inputs
{input: "44444444", want: []byte{0x44, 0x44, 0x44, 0x44}},
{input: "0x44444444", want: []byte{0x44, 0x44, 0x44, 0x44}},
}
for _, test := range tests {
out := make([]byte, 4)
err := UnmarshalFixedUnprefixedText("x", []byte(test.input), out)
switch {
case err == nil && test.wantErr != nil:
t.Errorf("%q: got no error, expected %q", test.input, test.wantErr)
case err != nil && test.wantErr == nil:
t.Errorf("%q: unexpected error %q", test.input, err)
case err != nil && err.Error() != test.wantErr.Error():
t.Errorf("%q: error mismatch: got %q, want %q", test.input, err, test.wantErr)
}
if test.want != nil && !bytes.Equal(out, test.want) {
t.Errorf("%q: output mismatch: got %x, want %x", test.input, out, test.want)
}
}
}
