// 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 base32
import (
"bytes"
"errors"
"io"
"io/ioutil"
"strings"
"testing"
)
type testpair struct {
decoded, encoded string
}
var pairs = []testpair{
// RFC 4648 examples
{"", ""},
{"f", "MY======"},
{"fo", "MZXQ===="},
{"foo", "MZXW6==="},
{"foob", "MZXW6YQ="},
{"fooba", "MZXW6YTB"},
{"foobar", "MZXW6YTBOI======"},
// Wikipedia examples, converted to base32
{"sure.", "ON2XEZJO"},
{"sure", "ON2XEZI="},
{"sur", "ON2XE==="},
{"su", "ON2Q===="},
{"leasure.", "NRSWC43VOJSS4==="},
{"easure.", "MVQXG5LSMUXA===="},
{"asure.", "MFZXK4TFFY======"},
{"sure.", "ON2XEZJO"},
}
var bigtest = testpair{
"Twas brillig, and the slithy toves",
"KR3WC4ZAMJZGS3DMNFTSYIDBNZSCA5DIMUQHG3DJORUHSIDUN53GK4Y=",
}
func testEqual(t *testing.T, msg string, args ...interface{}) bool {
t.Helper()
if args[len(args)-2] != args[len(args)-1] {
t.Errorf(msg, args...)
return false
}
return true
}
func TestEncode(t *testing.T) {
for _, p := range pairs {
got := StdEncoding.EncodeToString([]byte(p.decoded))
testEqual(t, "Encode(%q) = %q, want %q", p.decoded, got, p.encoded)
}
}
func TestEncoder(t *testing.T) {
for _, p := range pairs {
bb := &bytes.Buffer{}
encoder := NewEncoder(StdEncoding, bb)
encoder.Write([]byte(p.decoded))
encoder.Close()
testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded)
}
}
func TestEncoderBuffering(t *testing.T) {
input := []byte(bigtest.decoded)
for bs := 1; bs <= 12; bs++ {
bb := &bytes.Buffer{}
encoder := NewEncoder(StdEncoding, bb)
for pos := 0; pos < len(input); pos += bs {
end := pos + bs
if end > len(input) {
end = len(input)
}
n, err := encoder.Write(input[pos:end])
testEqual(t, "Write(%q) gave error %v, want %v", input[pos:end], err, error(nil))
testEqual(t, "Write(%q) gave length %v, want %v", input[pos:end], n, end-pos)
}
err := encoder.Close()
testEqual(t, "Close gave error %v, want %v", err, error(nil))
testEqual(t, "Encoding/%d of %q = %q, want %q", bs, bigtest.decoded, bb.String(), bigtest.encoded)
}
}
func TestDecode(t *testing.T) {
for _, p := range pairs {
dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)))
count, end, err := StdEncoding.decode(dbuf, []byte(p.encoded))
testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, error(nil))
testEqual(t, "Decode(%q) = length %v, want %v", p.encoded, count, len(p.decoded))
if len(p.encoded) > 0 {
testEqual(t, "Decode(%q) = end %v, want %v", p.encoded, end, (p.encoded[len(p.encoded)-1] == '='))
}
testEqual(t, "Decode(%q) = %q, want %q", p.encoded,
string(dbuf[0:count]),
p.decoded)
dbuf, err = StdEncoding.DecodeString(p.encoded)
testEqual(t, "DecodeString(%q) = error %v, want %v", p.encoded, err, error(nil))
testEqual(t, "DecodeString(%q) = %q, want %q", p.encoded, string(dbuf), p.decoded)
}
}
func TestDecoder(t *testing.T) {
for _, p := range pairs {
decoder := NewDecoder(StdEncoding, strings.NewReader(p.encoded))
dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)))
count, err := decoder.Read(dbuf)
if err != nil && err != io.EOF {
t.Fatal("Read failed", err)
}
testEqual(t, "Read from %q = length %v, want %v", p.encoded, count, len(p.decoded))
testEqual(t, "Decoding of %q = %q, want %q", p.encoded, string(dbuf[0:count]), p.decoded)
if err != io.EOF {
_, err = decoder.Read(dbuf)
}
testEqual(t, "Read from %q = %v, want %v", p.encoded, err, io.EOF)
}
}
type badReader struct {
data []byte
errs []error
called int
limit int
}
// Populates p with data, returns a count of the bytes written and an
// error. The error returned is taken from badReader.errs, with each
// invocation of Read returning the next error in this slice, or io.EOF,
// if all errors from the slice have already been returned. The
// number of bytes returned is determined by the size of the input buffer
// the test passes to decoder.Read and will be a multiple of 8, unless
// badReader.limit is non zero.
func (b *badReader) Read(p []byte) (int, error) {
lim := len(p)
if b.limit != 0 && b.limit < lim {
lim = b.limit
}
if len(b.data) < lim {
lim = len(b.data)
}
for i := range p[:lim] {
p[i] = b.data[i]
}
b.data = b.data[lim:]
err := io.EOF
if b.called < len(b.errs) {
err = b.errs[b.called]
}
b.called++
return lim, err
}
// TestIssue20044 tests that decoder.Read behaves correctly when the caller
// supplied reader returns an error.
func TestIssue20044(t *testing.T) {
badErr := errors.New("bad reader error")
testCases := []struct {
r badReader
res string
err error
dbuflen int
}{
// Check valid input data accompanied by an error is processed and the error is propagated.
{r: badReader{data: []byte("MY======"), errs: []error{badErr}},
res: "f", err: badErr},
// Check a read error accompanied by input data consisting of newlines only is propagated.
{r: badReader{data: []byte("\n\n\n\n\n\n\n\n"), errs: []error{badErr, nil}},
res: "", err: badErr},
// Reader will be called twice. The first time it will return 8 newline characters. The
// second time valid base32 encoded data and an error. The data should be decoded
// correctly and the error should be propagated.
{r: badReader{data: []byte("\n\n\n\n\n\n\n\nMY======"), errs: []error{nil, badErr}},
res: "f", err: badErr, dbuflen: 8},
// Reader returns invalid input data (too short) and an error. Verify the reader
// error is returned.
{r: badReader{data: []byte("MY====="), errs: []error{badErr}},
res: "", err: badErr},
// Reader returns invalid input data (too short) but no error. Verify io.ErrUnexpectedEOF
// is returned.
{r: badReader{data: []byte("MY====="), errs: []error{nil}},
res: "", err: io.ErrUnexpectedEOF},
// Reader returns invalid input data and an error. Verify the reader and not the
// decoder error is returned.
{r: badReader{data: []byte("Ma======"), errs: []error{badErr}},
res: "", err: badErr},
// Reader returns valid data and io.EOF. Check data is decoded and io.EOF is propagated.
{r: badReader{data: []byte("MZXW6YTB"), errs: []error{io.EOF}},
res: "fooba", err: io.EOF},
// Check errors are properly reported when decoder.Read is called multiple times.
// decoder.Read will be called 8 times, badReader.Read will be called twice, returning
// valid data both times but an error on the second call.
{r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{nil, badErr}},
res: "leasure.", err: badErr, dbuflen: 1},
// Check io.EOF is properly reported when decoder.Read is called multiple times.
// decoder.Read will be called 8 times, badReader.Read will be called twice, returning
// valid data both times but io.EOF on the second call.
{r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{nil, io.EOF}},
res: "leasure.", err: io.EOF, dbuflen: 1},
// The following two test cases check that errors are propagated correctly when more than
// 8 bytes are read at a time.
{r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{io.EOF}},
res: "leasure.", err: io.EOF, dbuflen: 11},
{r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{badErr}},
res: "leasure.", err: badErr, dbuflen: 11},
// Check that errors are correctly propagated when the reader returns valid bytes in
// groups that are not divisible by 8. The first read will return 11 bytes and no
// error. The second will return 7 and an error. The data should be decoded correctly
// and the error should be propagated.
{r: badReader{data: []byte("NRSWC43VOJSS4==="), errs: []error{nil, badErr}, limit: 11},
res: "leasure.", err: badErr},
}
for _, tc := range testCases {
input := tc.r.data
decoder := NewDecoder(StdEncoding, &tc.r)
var dbuflen int
if tc.dbuflen > 0 {
dbuflen = tc.dbuflen
} else {
dbuflen = StdEncoding.DecodedLen(len(input))
}
dbuf := make([]byte, dbuflen)
var err error
var res []byte
for err == nil {
var n int
n, err = decoder.Read(dbuf)
if n > 0 {
res = append(res, dbuf[:n]...)
}
}
testEqual(t, "Decoding of %q = %q, want %q", string(input), string(res), tc.res)
testEqual(t, "Decoding of %q err = %v, expected %v", string(input), err, tc.err)
}
}
// TestDecoderError verifies decode errors are propagated when there are no read
// errors.
func TestDecoderError(t *testing.T) {
for _, readErr := range []error{io.EOF, nil} {
input := "MZXW6YTb"
dbuf := make([]byte, StdEncoding.DecodedLen(len(input)))
br := badReader{data: []byte(input), errs: []error{readErr}}
decoder := NewDecoder(StdEncoding, &br)
n, err := decoder.Read(dbuf)
testEqual(t, "Read after EOF, n = %d, expected %d", n, 0)
if _, ok := err.(CorruptInputError); !ok {
t.Errorf("Corrupt input error expected. Found %T", err)
}
}
}
// TestReaderEOF ensures decoder.Read behaves correctly when input data is
// exhausted.
func TestReaderEOF(t *testing.T) {
for _, readErr := range []error{io.EOF, nil} {
input := "MZXW6YTB"
br := badReader{data: []byte(input), errs: []error{nil, readErr}}
decoder := NewDecoder(StdEncoding, &br)
dbuf := make([]byte, StdEncoding.DecodedLen(len(input)))
n, err := decoder.Read(dbuf)
testEqual(t, "Decoding of %q err = %v, expected %v", string(input), err, error(nil))
n, err = decoder.Read(dbuf)
testEqual(t, "Read after EOF, n = %d, expected %d", n, 0)
testEqual(t, "Read after EOF, err = %v, expected %v", err, io.EOF)
n, err = decoder.Read(dbuf)
testEqual(t, "Read after EOF, n = %d, expected %d", n, 0)
testEqual(t, "Read after EOF, err = %v, expected %v", err, io.EOF)
}
}
func TestDecoderBuffering(t *testing.T) {
for bs := 1; bs <= 12; bs++ {
decoder := NewDecoder(StdEncoding, strings.NewReader(bigtest.encoded))
buf := make([]byte, len(bigtest.decoded)+12)
var total int
var n int
var err error
for total = 0; total < len(bigtest.decoded) && err == nil; {
n, err = decoder.Read(buf[total : total+bs])
total += n
}
if err != nil && err != io.EOF {
t.Errorf("Read from %q at pos %d = %d, unexpected error %v", bigtest.encoded, total, n, err)
}
testEqual(t, "Decoding/%d of %q = %q, want %q", bs, bigtest.encoded, string(buf[0:total]), bigtest.decoded)
}
}
func TestDecodeCorrupt(t *testing.T) {
testCases := []struct {
input string
offset int // -1 means no corruption.
}{
{"", -1},
{"!!!!", 0},
{"x===", 0},
{"AA=A====", 2},
{"AAA=AAAA", 3},
{"MMMMMMMMM", 8},
{"MMMMMM", 0},
{"A=", 1},
{"AA=", 3},
{"AA==", 4},
{"AA===", 5},
{"AAAA=", 5},
{"AAAA==", 6},
{"AAAAA=", 6},
{"AAAAA==", 7},
{"A=======", 1},
{"AA======", -1},
{"AAA=====", 3},
{"AAAA====", -1},
{"AAAAA===", -1},
{"AAAAAA==", 6},
{"AAAAAAA=", -1},
{"AAAAAAAA", -1},
}
for _, tc := range testCases {
dbuf := make([]byte, StdEncoding.DecodedLen(len(tc.input)))
_, err := StdEncoding.Decode(dbuf, []byte(tc.input))
if tc.offset == -1 {
if err != nil {
t.Error("Decoder wrongly detected corruption in", tc.input)
}
continue
}
switch err := err.(type) {
case CorruptInputError:
testEqual(t, "Corruption in %q at offset %v, want %v", tc.input, int(err), tc.offset)
default:
t.Error("Decoder failed to detect corruption in", tc)
}
}
}
func TestBig(t *testing.T) {
n := 3*1000 + 1
raw := make([]byte, n)
const alpha = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
for i := 0; i < n; i++ {
raw[i] = alpha[i%len(alpha)]
}
encoded := new(bytes.Buffer)
w := NewEncoder(StdEncoding, encoded)
nn, err := w.Write(raw)
if nn != n || err != nil {
t.Fatalf("Encoder.Write(raw) = %d, %v want %d, nil", nn, err, n)
}
err = w.Close()
if err != nil {
t.Fatalf("Encoder.Close() = %v want nil", err)
}
decoded, err := ioutil.ReadAll(NewDecoder(StdEncoding, encoded))
if err != nil {
t.Fatalf("ioutil.ReadAll(NewDecoder(...)): %v", err)
}
if !bytes.Equal(raw, decoded) {
var i int
for i = 0; i < len(decoded) && i < len(raw); i++ {
if decoded[i] != raw[i] {
break
}
}
t.Errorf("Decode(Encode(%d-byte string)) failed at offset %d", n, i)
}
}
func testStringEncoding(t *testing.T, expected string, examples []string) {
for _, e := range examples {
buf, err := StdEncoding.DecodeString(e)
if err != nil {
t.Errorf("Decode(%q) failed: %v", e, err)
continue
}
if s := string(buf); s != expected {
t.Errorf("Decode(%q) = %q, want %q", e, s, expected)
}
}
}
func TestNewLineCharacters(t *testing.T) {
// Each of these should decode to the string "sure", without errors.
examples := []string{
"ON2XEZI=",
"ON2XEZI=\r",
"ON2XEZI=\n",
"ON2XEZI=\r\n",
"ON2XEZ\r\nI=",
"ON2X\rEZ\nI=",
"ON2X\nEZ\rI=",
"ON2XEZ\nI=",
"ON2XEZI\n=",
}
testStringEncoding(t, "sure", examples)
// Each of these should decode to the string "foobar", without errors.
examples = []string{
"MZXW6YTBOI======",
"MZXW6YTBOI=\r\n=====",
}
testStringEncoding(t, "foobar", examples)
}
func TestDecoderIssue4779(t *testing.T) {
encoded := `JRXXEZLNEBUXA43VNUQGI33MN5ZCA43JOQQGC3LFOQWCAY3PNZZWKY3UMV2HK4
RAMFSGS4DJONUWG2LOM4QGK3DJOQWCA43FMQQGI3YKMVUXK43NN5SCA5DFNVYG64RANFXGG2LENFSH
K3TUEB2XIIDMMFRG64TFEBSXIIDEN5WG64TFEBWWCZ3OMEQGC3DJOF2WCLRAKV2CAZLONFWQUYLEEB
WWS3TJNUQHMZLONFQW2LBAOF2WS4ZANZXXG5DSOVSCAZLYMVZGG2LUMF2GS33OEB2WY3DBNVRW6IDM
MFRG64TJOMQG42LTNEQHK5AKMFWGS4LVNFYCAZLYEBSWCIDDN5WW233EN4QGG33OONSXC5LBOQXCAR
DVNFZSAYLVORSSA2LSOVZGKIDEN5WG64RANFXAU4TFOBZGK2DFNZSGK4TJOQQGS3RAOZXWY5LQORQX
IZJAOZSWY2LUEBSXG43FEBRWS3DMOVWSAZDPNRXXEZJAMV2SAZTVM5UWC5BANZ2WY3DBBJYGC4TJMF
2HK4ROEBCXQY3FOB2GK5LSEBZWS3TUEBXWGY3BMVRWC5BAMN2XA2LEMF2GC5BANZXW4IDQOJXWSZDF
NZ2CYIDTOVXHIIDJNYFGG5LMOBQSA4LVNEQG6ZTGNFRWSYJAMRSXGZLSOVXHIIDNN5WGY2LUEBQW42
LNEBUWIIDFON2CA3DBMJXXE5LNFY==
====`
encodedShort := strings.ReplaceAll(encoded, "\n", "")
dec := NewDecoder(StdEncoding, strings.NewReader(encoded))
res1, err := ioutil.ReadAll(dec)
if err != nil {
t.Errorf("ReadAll failed: %v", err)
}
dec = NewDecoder(StdEncoding, strings.NewReader(encodedShort))
var res2 []byte
res2, err = ioutil.ReadAll(dec)
if err != nil {
t.Errorf("ReadAll failed: %v", err)
}
if !bytes.Equal(res1, res2) {
t.Error("Decoded results not equal")
}
}
func BenchmarkEncodeToString(b *testing.B) {
data := make([]byte, 8192)
b.SetBytes(int64(len(data)))
for i := 0; i < b.N; i++ {
StdEncoding.EncodeToString(data)
}
}
func BenchmarkDecodeString(b *testing.B) {
data := StdEncoding.EncodeToString(make([]byte, 8192))
b.SetBytes(int64(len(data)))
for i := 0; i < b.N; i++ {
StdEncoding.DecodeString(data)
}
}
func TestWithCustomPadding(t *testing.T) {
for _, testcase := range pairs {
defaultPadding := StdEncoding.EncodeToString([]byte(testcase.decoded))
customPadding := StdEncoding.WithPadding('@').EncodeToString([]byte(testcase.decoded))
expected := strings.ReplaceAll(defaultPadding, "=", "@")
if expected != customPadding {
t.Errorf("Expected custom %s, got %s", expected, customPadding)
}
if testcase.encoded != defaultPadding {
t.Errorf("Expected %s, got %s", testcase.encoded, defaultPadding)
}
}
}
func TestWithoutPadding(t *testing.T) {
for _, testcase := range pairs {
defaultPadding := StdEncoding.EncodeToString([]byte(testcase.decoded))
customPadding := StdEncoding.WithPadding(NoPadding).EncodeToString([]byte(testcase.decoded))
expected := strings.TrimRight(defaultPadding, "=")
if expected != customPadding {
t.Errorf("Expected custom %s, got %s", expected, customPadding)
}
if testcase.encoded != defaultPadding {
t.Errorf("Expected %s, got %s", testcase.encoded, defaultPadding)
}
}
}
func TestDecodeWithPadding(t *testing.T) {
encodings := []*Encoding{
StdEncoding,
StdEncoding.WithPadding('-'),
StdEncoding.WithPadding(NoPadding),
}
for i, enc := range encodings {
for _, pair := range pairs {
input := pair.decoded
encoded := enc.EncodeToString([]byte(input))
decoded, err := enc.DecodeString(encoded)
if err != nil {
t.Errorf("DecodeString Error for encoding %d (%q): %v", i, input, err)
}
if input != string(decoded) {
t.Errorf("Unexpected result for encoding %d: got %q; want %q", i, decoded, input)
}
}
}
}
func TestDecodeWithWrongPadding(t *testing.T) {
encoded := StdEncoding.EncodeToString([]byte("foobar"))
_, err := StdEncoding.WithPadding('-').DecodeString(encoded)
if err == nil {
t.Error("expected error")
}
_, err = StdEncoding.WithPadding(NoPadding).DecodeString(encoded)
if err == nil {
t.Error("expected error")
}
}
func TestBufferedDecodingSameError(t *testing.T) {
testcases := []struct {
prefix string
chunkCombinations [][]string
expected error
}{
// NBSWY3DPO5XXE3DE == helloworld
// Test with "ZZ" as extra input
{"helloworld", [][]string{
{"NBSW", "Y3DP", "O5XX", "E3DE", "ZZ"},
{"NBSWY3DPO5XXE3DE", "ZZ"},
{"NBSWY3DPO5XXE3DEZZ"},
{"NBS", "WY3", "DPO", "5XX", "E3D", "EZZ"},
{"NBSWY3DPO5XXE3", "DEZZ"},
}, io.ErrUnexpectedEOF},
// Test with "ZZY" as extra input
{"helloworld", [][]string{
{"NBSW", "Y3DP", "O5XX", "E3DE", "ZZY"},
{"NBSWY3DPO5XXE3DE", "ZZY"},
{"NBSWY3DPO5XXE3DEZZY"},
{"NBS", "WY3", "DPO", "5XX", "E3D", "EZZY"},
{"NBSWY3DPO5XXE3", "DEZZY"},
}, io.ErrUnexpectedEOF},
// Normal case, this is valid input
{"helloworld", [][]string{
{"NBSW", "Y3DP", "O5XX", "E3DE"},
{"NBSWY3DPO5XXE3DE"},
{"NBS", "WY3", "DPO", "5XX", "E3D", "E"},
{"NBSWY3DPO5XXE3", "DE"},
}, nil},
// MZXW6YTB = fooba
{"fooba", [][]string{
{"MZXW6YTBZZ"},
{"MZXW6YTBZ", "Z"},
{"MZXW6YTB", "ZZ"},
{"MZXW6YT", "BZZ"},
{"MZXW6Y", "TBZZ"},
{"MZXW6Y", "TB", "ZZ"},
{"MZXW6", "YTBZZ"},
{"MZXW6", "YTB", "ZZ"},
{"MZXW6", "YT", "BZZ"},
}, io.ErrUnexpectedEOF},
// Normal case, this is valid input
{"fooba", [][]string{
{"MZXW6YTB"},
{"MZXW6YT", "B"},
{"MZXW6Y", "TB"},
{"MZXW6", "YTB"},
{"MZXW6", "YT", "B"},
{"MZXW", "6YTB"},
{"MZXW", "6Y", "TB"},
}, nil},
}
for _, testcase := range testcases {
for _, chunks := range testcase.chunkCombinations {
pr, pw := io.Pipe()
// Write the encoded chunks into the pipe
go func() {
for _, chunk := range chunks {
pw.Write([]byte(chunk))
}
pw.Close()
}()
decoder := NewDecoder(StdEncoding, pr)
_, err := ioutil.ReadAll(decoder)
if err != testcase.expected {
t.Errorf("Expected %v, got %v; case %s %+v", testcase.expected, err, testcase.prefix, chunks)
}
}
}
}
func TestEncodedDecodedLen(t *testing.T) {
type test struct {
in int
wantEnc int
wantDec int
}
data := bytes.Repeat([]byte("x"), 100)
for _, test := range []struct {
name string
enc *Encoding
cases []test
}{
{"StdEncoding", StdEncoding, []test{
{0, 0, 0},
{1, 8, 5},
{5, 8, 5},
{6, 16, 10},
{10, 16, 10},
}},
{"NoPadding", StdEncoding.WithPadding(NoPadding), []test{
{0, 0, 0},
{1, 2, 1},
{2, 4, 2},
{5, 8, 5},
{6, 10, 6},
{7, 12, 7},
{10, 16, 10},
{11, 18, 11},
}},
} {
t.Run(test.name, func(t *testing.T) {
for _, tc := range test.cases {
encLen := test.enc.EncodedLen(tc.in)
decLen := test.enc.DecodedLen(encLen)
enc := test.enc.EncodeToString(data[:tc.in])
if len(enc) != encLen {
t.Fatalf("EncodedLen(%d) = %d but encoded to %q (%d)", tc.in, encLen, enc, len(enc))
}
if encLen != tc.wantEnc {
t.Fatalf("EncodedLen(%d) = %d; want %d", tc.in, encLen, tc.wantEnc)
}
if decLen != tc.wantDec {
t.Fatalf("DecodedLen(%d) = %d; want %d", encLen, decLen, tc.wantDec)
}
}
})
}
}
func TestWithoutPaddingClose(t *testing.T) {
encodings := []*Encoding{
StdEncoding,
StdEncoding.WithPadding(NoPadding),
}
for _, encoding := range encodings {
for _, testpair := range pairs {
var buf bytes.Buffer
encoder := NewEncoder(encoding, &buf)
encoder.Write([]byte(testpair.decoded))
encoder.Close()
expected := testpair.encoded
if encoding.padChar == NoPadding {
expected = strings.ReplaceAll(expected, "=", "")
}
res := buf.String()
if res != expected {
t.Errorf("Expected %s got %s; padChar=%d", expected, res, encoding.padChar)
}
}
}
}
func TestDecodeReadAll(t *testing.T) {
encodings := []*Encoding{
StdEncoding,
StdEncoding.WithPadding(NoPadding),
}
for _, pair := range pairs {
for encIndex, encoding := range encodings {
encoded := pair.encoded
if encoding.padChar == NoPadding {
encoded = strings.ReplaceAll(encoded, "=", "")
}
decReader, err := ioutil.ReadAll(NewDecoder(encoding, strings.NewReader(encoded)))
if err != nil {
t.Errorf("NewDecoder error: %v", err)
}
if pair.decoded != string(decReader) {
t.Errorf("Expected %s got %s; Encoding %d", pair.decoded, decReader, encIndex)
}
}
}
}
func TestDecodeSmallBuffer(t *testing.T) {
encodings := []*Encoding{
StdEncoding,
StdEncoding.WithPadding(NoPadding),
}
for bufferSize := 1; bufferSize < 200; bufferSize++ {
for _, pair := range pairs {
for encIndex, encoding := range encodings {
encoded := pair.encoded
if encoding.padChar == NoPadding {
encoded = strings.ReplaceAll(encoded, "=", "")
}
decoder := NewDecoder(encoding, strings.NewReader(encoded))
var allRead []byte
for {
buf := make([]byte, bufferSize)
n, err := decoder.Read(buf)
allRead = append(allRead, buf[0:n]...)
if err == io.EOF {
break
}
if err != nil {
t.Error(err)
}
}
if pair.decoded != string(allRead) {
t.Errorf("Expected %s got %s; Encoding %d; bufferSize %d", pair.decoded, allRead, encIndex, bufferSize)
}
}
}
}
}
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