| // 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 { |
| count, 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{ |
| []string{"NBSW", "Y3DP", "O5XX", "E3DE", "ZZ"}, |
| []string{"NBSWY3DPO5XXE3DE", "ZZ"}, |
| []string{"NBSWY3DPO5XXE3DEZZ"}, |
| []string{"NBS", "WY3", "DPO", "5XX", "E3D", "EZZ"}, |
| []string{"NBSWY3DPO5XXE3", "DEZZ"}, |
| }, io.ErrUnexpectedEOF}, |
| |
| // Test with "ZZY" as extra input |
| {"helloworld", [][]string{ |
| []string{"NBSW", "Y3DP", "O5XX", "E3DE", "ZZY"}, |
| []string{"NBSWY3DPO5XXE3DE", "ZZY"}, |
| []string{"NBSWY3DPO5XXE3DEZZY"}, |
| []string{"NBS", "WY3", "DPO", "5XX", "E3D", "EZZY"}, |
| []string{"NBSWY3DPO5XXE3", "DEZZY"}, |
| }, io.ErrUnexpectedEOF}, |
| |
| // Normal case, this is valid input |
| {"helloworld", [][]string{ |
| []string{"NBSW", "Y3DP", "O5XX", "E3DE"}, |
| []string{"NBSWY3DPO5XXE3DE"}, |
| []string{"NBS", "WY3", "DPO", "5XX", "E3D", "E"}, |
| []string{"NBSWY3DPO5XXE3", "DE"}, |
| }, nil}, |
| |
| // MZXW6YTB = fooba |
| {"fooba", [][]string{ |
| []string{"MZXW6YTBZZ"}, |
| []string{"MZXW6YTBZ", "Z"}, |
| []string{"MZXW6YTB", "ZZ"}, |
| []string{"MZXW6YT", "BZZ"}, |
| []string{"MZXW6Y", "TBZZ"}, |
| []string{"MZXW6Y", "TB", "ZZ"}, |
| []string{"MZXW6", "YTBZZ"}, |
| []string{"MZXW6", "YTB", "ZZ"}, |
| []string{"MZXW6", "YT", "BZZ"}, |
| }, io.ErrUnexpectedEOF}, |
| |
| // Normal case, this is valid input |
| {"fooba", [][]string{ |
| []string{"MZXW6YTB"}, |
| []string{"MZXW6YT", "B"}, |
| []string{"MZXW6Y", "TB"}, |
| []string{"MZXW6", "YTB"}, |
| []string{"MZXW6", "YT", "B"}, |
| []string{"MZXW", "6YTB"}, |
| []string{"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) |
| } |
| } |
| } |
| } |
| } |