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// 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 hex
import (
"bytes"
"testing"
)
type encDecTest struct {
enc string
dec []byte
}
var encDecTests = []encDecTest{
{"", []byte{}},
{"0001020304050607", []byte{0, 1, 2, 3, 4, 5, 6, 7}},
{"08090a0b0c0d0e0f", []byte{8, 9, 10, 11, 12, 13, 14, 15}},
{"f0f1f2f3f4f5f6f7", []byte{0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7}},
{"f8f9fafbfcfdfeff", []byte{0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff}},
{"67", []byte{'g'}},
{"e3a1", []byte{0xe3, 0xa1}},
}
func TestEncode(t *testing.T) {
for i, test := range encDecTests {
dst := make([]byte, EncodedLen(len(test.dec)))
n := Encode(dst, test.dec)
if n != len(dst) {
t.Errorf("#%d: bad return value: got: %d want: %d", i, n, len(dst))
}
if string(dst) != test.enc {
t.Errorf("#%d: got: %#v want: %#v", i, dst, test.enc)
}
}
}
func TestDecode(t *testing.T) {
// Case for decoding uppercase hex characters, since
// Encode always uses lowercase.
decTests := append(encDecTests, encDecTest{"F8F9FAFBFCFDFEFF", []byte{0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff}})
for i, test := range decTests {
dst := make([]byte, DecodedLen(len(test.enc)))
n, err := Decode(dst, []byte(test.enc))
if err != nil {
t.Errorf("#%d: bad return value: got:%d want:%d", i, n, len(dst))
} else if !bytes.Equal(dst, test.dec) {
t.Errorf("#%d: got: %#v want: %#v", i, dst, test.dec)
}
}
}
func TestEncodeToString(t *testing.T) {
for i, test := range encDecTests {
s := EncodeToString(test.dec)
if s != test.enc {
t.Errorf("#%d got:%s want:%s", i, s, test.enc)
}
}
}
func TestDecodeString(t *testing.T) {
for i, test := range encDecTests {
dst, err := DecodeString(test.enc)
if err != nil {
t.Errorf("#%d: unexpected err value: %s", i, err)
continue
}
if !bytes.Equal(dst, test.dec) {
t.Errorf("#%d: got: %#v want: #%v", i, dst, test.dec)
}
}
}
type errTest struct {
in string
err string
}
var errTests = []errTest{
{"0", "encoding/hex: odd length hex string"},
{"0g", "encoding/hex: invalid byte: U+0067 'g'"},
{"00gg", "encoding/hex: invalid byte: U+0067 'g'"},
{"0\x01", "encoding/hex: invalid byte: U+0001"},
}
func TestInvalidErr(t *testing.T) {
for i, test := range errTests {
dst := make([]byte, DecodedLen(len(test.in)))
_, err := Decode(dst, []byte(test.in))
if err == nil {
t.Errorf("#%d: expected error; got none", i)
} else if err.Error() != test.err {
t.Errorf("#%d: got: %v want: %v", i, err, test.err)
}
}
}
func TestInvalidStringErr(t *testing.T) {
for i, test := range errTests {
_, err := DecodeString(test.in)
if err == nil {
t.Errorf("#%d: expected error; got none", i)
} else if err.Error() != test.err {
t.Errorf("#%d: got: %v want: %v", i, err, test.err)
}
}
}
func TestDumper(t *testing.T) {
var in [40]byte
for i := range in {
in[i] = byte(i + 30)
}
for stride := 1; stride < len(in); stride++ {
var out bytes.Buffer
dumper := Dumper(&out)
done := 0
for done < len(in) {
todo := done + stride
if todo > len(in) {
todo = len(in)
}
dumper.Write(in[done:todo])
done = todo
}
dumper.Close()
if !bytes.Equal(out.Bytes(), expectedHexDump) {
t.Errorf("stride: %d failed. got:\n%s\nwant:\n%s", stride, out.Bytes(), expectedHexDump)
}
}
}
func TestDump(t *testing.T) {
var in [40]byte
for i := range in {
in[i] = byte(i + 30)
}
out := []byte(Dump(in[:]))
if !bytes.Equal(out, expectedHexDump) {
t.Errorf("got:\n%s\nwant:\n%s", out, expectedHexDump)
}
}
var expectedHexDump = []byte(`00000000 1e 1f 20 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d |.. !"#$%&'()*+,-|
00000010 2e 2f 30 31 32 33 34 35 36 37 38 39 3a 3b 3c 3d |./0123456789:;<=|
00000020 3e 3f 40 41 42 43 44 45 |>?@ABCDE|
`)
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