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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgo/] [go/] [encoding/] [base64/] [base64_test.go] - Blame information for rev 774

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1 747 jeremybenn 
// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package base64
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import (
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        "bytes"
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        "io"
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        "io/ioutil"
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        "testing"
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)
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type testpair struct {
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        decoded, encoded string
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}
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var pairs = []testpair{
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        // RFC 3548 examples
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        {"\x14\xfb\x9c\x03\xd9\x7e", "FPucA9l+"},
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        {"\x14\xfb\x9c\x03\xd9", "FPucA9k="},
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        {"\x14\xfb\x9c\x03", "FPucAw=="},
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        // RFC 4648 examples
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        {"", ""},
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        {"f", "Zg=="},
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        {"fo", "Zm8="},
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        {"foo", "Zm9v"},
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        {"foob", "Zm9vYg=="},
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        {"fooba", "Zm9vYmE="},
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        {"foobar", "Zm9vYmFy"},
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        // Wikipedia examples
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        {"sure.", "c3VyZS4="},
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        {"sure", "c3VyZQ=="},
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        {"sur", "c3Vy"},
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        {"su", "c3U="},
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        {"leasure.", "bGVhc3VyZS4="},
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        {"easure.", "ZWFzdXJlLg=="},
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        {"asure.", "YXN1cmUu"},
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        {"sure.", "c3VyZS4="},
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}
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var bigtest = testpair{
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        "Twas brillig, and the slithy toves",
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        "VHdhcyBicmlsbGlnLCBhbmQgdGhlIHNsaXRoeSB0b3Zlcw==",
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}
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func testEqual(t *testing.T, msg string, args ...interface{}) bool {
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        if args[len(args)-2] != args[len(args)-1] {
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                t.Errorf(msg, args...)
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                return false
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        }
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        return true
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}
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func TestEncode(t *testing.T) {
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        for _, p := range pairs {
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                got := StdEncoding.EncodeToString([]byte(p.decoded))
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                testEqual(t, "Encode(%q) = %q, want %q", p.decoded, got, p.encoded)
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        }
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}
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func TestEncoder(t *testing.T) {
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        for _, p := range pairs {
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                bb := &bytes.Buffer{}
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                encoder := NewEncoder(StdEncoding, bb)
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                encoder.Write([]byte(p.decoded))
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                encoder.Close()
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                testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded)
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        }
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}
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func TestEncoderBuffering(t *testing.T) {
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        input := []byte(bigtest.decoded)
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        for bs := 1; bs <= 12; bs++ {
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                bb := &bytes.Buffer{}
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                encoder := NewEncoder(StdEncoding, bb)
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                for pos := 0; pos < len(input); pos += bs {
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                        end := pos + bs
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                        if end > len(input) {
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                                end = len(input)
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                        }
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                        n, err := encoder.Write(input[pos:end])
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                        testEqual(t, "Write(%q) gave error %v, want %v", input[pos:end], err, error(nil))
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                        testEqual(t, "Write(%q) gave length %v, want %v", input[pos:end], n, end-pos)
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                }
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                err := encoder.Close()
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                testEqual(t, "Close gave error %v, want %v", err, error(nil))
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                testEqual(t, "Encoding/%d of %q = %q, want %q", bs, bigtest.decoded, bb.String(), bigtest.encoded)
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        }
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}
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func TestDecode(t *testing.T) {
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        for _, p := range pairs {
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                dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)))
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                count, end, err := StdEncoding.decode(dbuf, []byte(p.encoded))
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                testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, error(nil))
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                testEqual(t, "Decode(%q) = length %v, want %v", p.encoded, count, len(p.decoded))
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                if len(p.encoded) > 0 {
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                        testEqual(t, "Decode(%q) = end %v, want %v", p.encoded, end, (p.encoded[len(p.encoded)-1] == '='))
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                }
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                testEqual(t, "Decode(%q) = %q, want %q", p.encoded, string(dbuf[0:count]), p.decoded)
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                dbuf, err = StdEncoding.DecodeString(p.encoded)
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                testEqual(t, "DecodeString(%q) = error %v, want %v", p.encoded, err, error(nil))
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                testEqual(t, "DecodeString(%q) = %q, want %q", string(dbuf), p.decoded)
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        }
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}
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func TestDecoder(t *testing.T) {
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        for _, p := range pairs {
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                decoder := NewDecoder(StdEncoding, bytes.NewBufferString(p.encoded))
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                dbuf := make([]byte, StdEncoding.DecodedLen(len(p.encoded)))
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                count, err := decoder.Read(dbuf)
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                if err != nil && err != io.EOF {
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                        t.Fatal("Read failed", err)
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                }
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                testEqual(t, "Read from %q = length %v, want %v", p.encoded, count, len(p.decoded))
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                testEqual(t, "Decoding of %q = %q, want %q", p.encoded, string(dbuf[0:count]), p.decoded)
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                if err != io.EOF {
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                        count, err = decoder.Read(dbuf)
123 
                }
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                testEqual(t, "Read from %q = %v, want %v", p.encoded, err, io.EOF)
125 
        }
126 
}
127 
 
128 
func TestDecoderBuffering(t *testing.T) {
129 
        for bs := 1; bs <= 12; bs++ {
130 
                decoder := NewDecoder(StdEncoding, bytes.NewBufferString(bigtest.encoded))
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                buf := make([]byte, len(bigtest.decoded)+12)
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                var total int
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                for total = 0; total < len(bigtest.decoded); {
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                        n, err := decoder.Read(buf[total : total+bs])
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                        testEqual(t, "Read from %q at pos %d = %d, %v, want _, %v", bigtest.encoded, total, n, err, error(nil))
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                        total += n
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                }
138 
                testEqual(t, "Decoding/%d of %q = %q, want %q", bs, bigtest.encoded, string(buf[0:total]), bigtest.decoded)
139 
        }
140 
}
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142 
func TestDecodeCorrupt(t *testing.T) {
143 
        type corrupt struct {
144 
                e string
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                p int
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        }
147 
        examples := []corrupt{
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                {"!!!!", 0},
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                {"x===", 1},
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                {"AA=A", 2},
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                {"AAA=AAAA", 3},
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                {"AAAAA", 4},
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                {"AAAAAA", 4},
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        }
155 
 
156 
        for _, e := range examples {
157 
                dbuf := make([]byte, StdEncoding.DecodedLen(len(e.e)))
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                _, err := StdEncoding.Decode(dbuf, []byte(e.e))
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                switch err := err.(type) {
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                case CorruptInputError:
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                        testEqual(t, "Corruption in %q at offset %v, want %v", e.e, int(err), e.p)
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                default:
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                        t.Error("Decoder failed to detect corruption in", e)
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                }
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        }
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}
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func TestBig(t *testing.T) {
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        n := 3*1000 + 1
170 
        raw := make([]byte, n)
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        const alpha = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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        for i := 0; i < n; i++ {
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                raw[i] = alpha[i%len(alpha)]
174 
        }
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        encoded := new(bytes.Buffer)
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        w := NewEncoder(StdEncoding, encoded)
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        nn, err := w.Write(raw)
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        if nn != n || err != nil {
179 
                t.Fatalf("Encoder.Write(raw) = %d, %v want %d, nil", nn, err, n)
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        }
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        err = w.Close()
182 
        if err != nil {
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                t.Fatalf("Encoder.Close() = %v want nil", err)
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        }
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        decoded, err := ioutil.ReadAll(NewDecoder(StdEncoding, encoded))
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        if err != nil {
187 
                t.Fatalf("ioutil.ReadAll(NewDecoder(...)): %v", err)
188 
        }
189 
 
190 
        if !bytes.Equal(raw, decoded) {
191 
                var i int
192 
                for i = 0; i < len(decoded) && i < len(raw); i++ {
193 
                        if decoded[i] != raw[i] {
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                                break
195 
                        }
196 
                }
197 
                t.Errorf("Decode(Encode(%d-byte string)) failed at offset %d", n, i)
198 
        }
199 
}
200 
 
201 
func TestNewLineCharacters(t *testing.T) {
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        // Each of these should decode to the string "sure", without errors.
203 
        const expected = "sure"
204 
        examples := []string{
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                "c3VyZQ==",
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                "c3VyZQ==\r",
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                "c3VyZQ==\n",
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                "c3VyZQ==\r\n",
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                "c3VyZ\r\nQ==",
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                "c3V\ryZ\nQ==",
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                "c3V\nyZ\rQ==",
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                "c3VyZ\nQ==",
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                "c3VyZQ\n==",
214 
        }
215 
        for _, e := range examples {
216 
                buf, err := StdEncoding.DecodeString(e)
217 
                if err != nil {
218 
                        t.Errorf("Decode(%q) failed: %v", e, err)
219 
                        continue
220 
                }
221 
                if s := string(buf); s != expected {
222 
                        t.Errorf("Decode(%q) = %q, want %q", e, s, expected)
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                }
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        }
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}

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