| // 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 git85 |
| |
| import ( |
| "bytes" |
| "io/ioutil" |
| "os" |
| "reflect" |
| "strings" |
| "testing" |
| ) |
| |
| type testpair struct { |
| decoded, encoded string |
| } |
| |
| func testEqual(t *testing.T, msg string, args ...) bool { |
| v := reflect.NewValue(args).(*reflect.StructValue) |
| v1 := v.Field(v.NumField() - 2) |
| v2 := v.Field(v.NumField() - 1) |
| if v1.Interface() != v2.Interface() { |
| t.Errorf(msg, args) |
| return false |
| } |
| return true |
| } |
| |
| func TestGitTable(t *testing.T) { |
| var saw [256]bool |
| for i, c := range encode { |
| if decode[c] != uint8(i+1) { |
| t.Errorf("decode['%c'] = %d, want %d", c, decode[c], i+1) |
| } |
| saw[c] = true |
| } |
| for i, b := range saw { |
| if !b && decode[i] != 0 { |
| t.Errorf("decode[%d] = %d, want 0", i, decode[i]) |
| } |
| } |
| } |
| |
| var gitPairs = []testpair{ |
| // Wikipedia example, adapted. |
| testpair{ |
| "Man is distinguished, not only by his reason, but by this singular passion from " + |
| "other animals, which is a lust of the mind, that by a perseverance of delight in " + |
| "the continued and indefatigable generation of knowledge, exceeds the short " + |
| "vehemence of any carnal pleasure.", |
| |
| "zO<`^zX>%ZCX>)XGZfA9Ab7*B`EFf-gbRchTY<VDJc_3(Mb0BhMVRLV8EFfZabRc4R\n" + |
| "zAarPHb0BkRZfA9DVR9gFVRLh7Z*CxFa&K)QZ**v7av))DX>DO_b1WctXlY|;AZc?T\n" + |
| "zVIXXEb95kYW*~HEWgu;7Ze%PVbZB98AYyqSVIXj2a&u*NWpZI|V`U(3W*}r`Y-wj`\n" + |
| "zbRcPNAarPDAY*TCbZKsNWn>^>Ze$>7Ze(R<VRUI{VPb4$AZKN6WpZJ3X>V>IZ)PBC\n" + |
| "zZf|#NWn^b%EFfigV`XJzb0BnRWgv5CZ*p`Xc4cT~ZDnp_Wgu^6AYpEKAY);2ZeeU7\n" + |
| "IaBO8^b9HiME&u=k\n", |
| }, |
| } |
| |
| var gitBigtest = gitPairs[len(gitPairs)-1] |
| |
| func TestEncode(t *testing.T) { |
| for _, p := range gitPairs { |
| buf := make([]byte, EncodedLen(len(p.decoded))) |
| n := Encode(buf, strings.Bytes(p.decoded)) |
| if n != len(buf) { |
| t.Errorf("EncodedLen does not agree with Encode") |
| } |
| buf = buf[0:n] |
| testEqual(t, "Encode(%q) = %q, want %q", p.decoded, string(buf), p.encoded) |
| } |
| } |
| |
| func TestEncoder(t *testing.T) { |
| for _, p := range gitPairs { |
| bb := &bytes.Buffer{} |
| encoder := NewEncoder(bb) |
| encoder.Write(strings.Bytes(p.decoded)) |
| encoder.Close() |
| testEqual(t, "Encode(%q) = %q, want %q", p.decoded, bb.String(), p.encoded) |
| } |
| } |
| |
| func TestEncoderBuffering(t *testing.T) { |
| input := strings.Bytes(gitBigtest.decoded) |
| for bs := 1; bs <= 12; bs++ { |
| bb := &bytes.Buffer{} |
| encoder := NewEncoder(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, os.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, os.Error(nil)) |
| testEqual(t, "Encoding/%d of %q = %q, want %q", bs, gitBigtest.decoded, bb.String(), gitBigtest.encoded) |
| } |
| } |
| |
| func TestDecode(t *testing.T) { |
| for _, p := range gitPairs { |
| dbuf := make([]byte, 4*len(p.encoded)) |
| ndst, err := Decode(dbuf, strings.Bytes(p.encoded)) |
| testEqual(t, "Decode(%q) = error %v, want %v", p.encoded, err, os.Error(nil)) |
| testEqual(t, "Decode(%q) = ndst %v, want %v", p.encoded, ndst, len(p.decoded)) |
| testEqual(t, "Decode(%q) = %q, want %q", p.encoded, string(dbuf[0:ndst]), p.decoded) |
| } |
| } |
| |
| func TestDecoder(t *testing.T) { |
| for _, p := range gitPairs { |
| decoder := NewDecoder(bytes.NewBufferString(p.encoded)) |
| dbuf, err := ioutil.ReadAll(decoder) |
| if err != nil { |
| t.Fatal("Read failed", err) |
| } |
| testEqual(t, "Read from %q = length %v, want %v", p.encoded, len(dbuf), len(p.decoded)) |
| testEqual(t, "Decoding of %q = %q, want %q", p.encoded, string(dbuf), p.decoded) |
| if err != nil { |
| testEqual(t, "Read from %q = %v, want %v", p.encoded, err, os.EOF) |
| } |
| } |
| } |
| |
| func TestDecoderBuffering(t *testing.T) { |
| for bs := 1; bs <= 12; bs++ { |
| decoder := NewDecoder(bytes.NewBufferString(gitBigtest.encoded)) |
| buf := make([]byte, len(gitBigtest.decoded)+12) |
| var total int |
| for total = 0; total < len(gitBigtest.decoded); { |
| n, err := decoder.Read(buf[total : total+bs]) |
| testEqual(t, "Read from %q at pos %d = %d, %v, want _, %v", gitBigtest.encoded, total, n, err, os.Error(nil)) |
| total += n |
| } |
| testEqual(t, "Decoding/%d of %q = %q, want %q", bs, gitBigtest.encoded, string(buf[0:total]), gitBigtest.decoded) |
| } |
| } |
| |
| func TestDecodeCorrupt(t *testing.T) { |
| type corrupt struct { |
| e string |
| p int |
| } |
| examples := []corrupt{ |
| corrupt{"v", 0}, |
| corrupt{"!z!!!!!!!!!", 0}, |
| } |
| |
| for _, e := range examples { |
| dbuf := make([]byte, 2*len(e.e)) |
| _, err := Decode(dbuf, strings.Bytes(e.e)) |
| switch err := err.(type) { |
| case CorruptInputError: |
| testEqual(t, "Corruption in %q at offset %v, want %v", e.e, int(err), e.p) |
| default: |
| t.Error("Decoder failed to detect corruption in", e) |
| } |
| } |
| } |
| |
| func TestGitBig(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(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(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) |
| } |
| } |