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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 encodeTest struct {
in, out []byte
}
var encodeTests = []encodeTest{
{[]byte{}, []byte{}},
{[]byte{0x01}, []byte{'0', '1'}},
{[]byte{0xff}, []byte{'f', 'f'}},
{[]byte{0xff, 00}, []byte{'f', 'f', '0', '0'}},
{[]byte{0}, []byte{'0', '0'}},
{[]byte{1}, []byte{'0', '1'}},
{[]byte{2}, []byte{'0', '2'}},
{[]byte{3}, []byte{'0', '3'}},
{[]byte{4}, []byte{'0', '4'}},
{[]byte{5}, []byte{'0', '5'}},
{[]byte{6}, []byte{'0', '6'}},
{[]byte{7}, []byte{'0', '7'}},
{[]byte{8}, []byte{'0', '8'}},
{[]byte{9}, []byte{'0', '9'}},
{[]byte{10}, []byte{'0', 'a'}},
{[]byte{11}, []byte{'0', 'b'}},
{[]byte{12}, []byte{'0', 'c'}},
{[]byte{13}, []byte{'0', 'd'}},
{[]byte{14}, []byte{'0', 'e'}},
{[]byte{15}, []byte{'0', 'f'}},
}
func TestEncode(t *testing.T) {
for i, test := range encodeTests {
dst := make([]byte, EncodedLen(len(test.in)))
n := Encode(dst, test.in)
if n != len(dst) {
t.Errorf("#%d: bad return value: got: %d want: %d", i, n, len(dst))
}
if bytes.Compare(dst, test.out) != 0 {
t.Errorf("#%d: got: %#v want: %#v", i, dst, test.out)
}
}
}
type decodeTest struct {
in, out []byte
ok bool
}
var decodeTests = []decodeTest{
{[]byte{}, []byte{}, true},
{[]byte{'0'}, []byte{}, false},
{[]byte{'0', 'g'}, []byte{}, false},
{[]byte{'0', '\x01'}, []byte{}, false},
{[]byte{'0', '0'}, []byte{0}, true},
{[]byte{'0', '1'}, []byte{1}, true},
{[]byte{'0', '2'}, []byte{2}, true},
{[]byte{'0', '3'}, []byte{3}, true},
{[]byte{'0', '4'}, []byte{4}, true},
{[]byte{'0', '5'}, []byte{5}, true},
{[]byte{'0', '6'}, []byte{6}, true},
{[]byte{'0', '7'}, []byte{7}, true},
{[]byte{'0', '8'}, []byte{8}, true},
{[]byte{'0', '9'}, []byte{9}, true},
{[]byte{'0', 'a'}, []byte{10}, true},
{[]byte{'0', 'b'}, []byte{11}, true},
{[]byte{'0', 'c'}, []byte{12}, true},
{[]byte{'0', 'd'}, []byte{13}, true},
{[]byte{'0', 'e'}, []byte{14}, true},
{[]byte{'0', 'f'}, []byte{15}, true},
{[]byte{'0', 'A'}, []byte{10}, true},
{[]byte{'0', 'B'}, []byte{11}, true},
{[]byte{'0', 'C'}, []byte{12}, true},
{[]byte{'0', 'D'}, []byte{13}, true},
{[]byte{'0', 'E'}, []byte{14}, true},
{[]byte{'0', 'F'}, []byte{15}, true},
}
func TestDecode(t *testing.T) {
for i, test := range decodeTests {
dst := make([]byte, DecodedLen(len(test.in)))
n, err := Decode(dst, test.in)
if err == nil && n != len(dst) {
t.Errorf("#%d: bad return value: got:%d want:%d", i, n, len(dst))
}
if test.ok != (err == nil) {
t.Errorf("#%d: unexpected err value: %s", i, err)
}
if err == nil && bytes.Compare(dst, test.out) != 0 {
t.Errorf("#%d: got: %#v want: %#v", i, dst, test.out)
}
}
}
type encodeStringTest struct {
in []byte
out string
}
var encodeStringTests = []encodeStringTest{
{[]byte{}, ""},
{[]byte{0}, "00"},
{[]byte{0, 1}, "0001"},
{[]byte{0, 1, 255}, "0001ff"},
}
func TestEncodeToString(t *testing.T) {
for i, test := range encodeStringTests {
s := EncodeToString(test.in)
if s != test.out {
t.Errorf("#%d got:%s want:%s", i, s, test.out)
}
}
}
type decodeStringTest struct {
in string
out []byte
ok bool
}
var decodeStringTests = []decodeStringTest{
{"", []byte{}, true},
{"0", []byte{}, false},
{"00", []byte{0}, true},
{"0\x01", []byte{}, false},
{"0g", []byte{}, false},
{"00ff00", []byte{0, 255, 0}, true},
{"0000ff", []byte{0, 0, 255}, true},
}
func TestDecodeString(t *testing.T) {
for i, test := range decodeStringTests {
dst, err := DecodeString(test.in)
if test.ok != (err == nil) {
t.Errorf("#%d: unexpected err value: %s", i, err)
}
if err == nil && bytes.Compare(dst, test.out) != 0 {
t.Errorf("#%d: got: %#v want: #%v", i, dst, test.out)
}
}
}
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++ {
out := bytes.NewBuffer(nil)
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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