1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
|
// Copyright 2014-2022 Ulrich Kunitz. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package lzma
import (
"bytes"
"fmt"
"testing"
)
func TestChunkTypeString(t *testing.T) {
tests := [...]struct {
c chunkType
s string
}{
{cEOS, "EOS"},
{cUD, "UD"},
{cU, "U"},
{cL, "L"},
{cLR, "LR"},
{cLRN, "LRN"},
{cLRND, "LRND"},
}
for _, c := range tests {
s := fmt.Sprintf("%v", c.c)
if s != c.s {
t.Errorf("got %s; want %s", s, c.s)
}
}
}
func TestHeaderChunkType(t *testing.T) {
tests := []struct {
h byte
c chunkType
}{
{h: 0, c: cEOS},
{h: 1, c: cUD},
{h: 2, c: cU},
{h: 1<<7 | 0x1f, c: cL},
{h: 1<<7 | 1<<5 | 0x1f, c: cLR},
{h: 1<<7 | 1<<6 | 0x1f, c: cLRN},
{h: 1<<7 | 1<<6 | 1<<5 | 0x1f, c: cLRND},
{h: 1<<7 | 1<<6 | 1<<5, c: cLRND},
}
if _, err := headerChunkType(3); err == nil {
t.Fatalf("headerChunkType(%d) got %v; want %v",
3, err, errHeaderByte)
}
for _, tc := range tests {
c, err := headerChunkType(tc.h)
if err != nil {
t.Fatalf("headerChunkType error %s", err)
}
if c != tc.c {
t.Errorf("got %s; want %s", c, tc.c)
}
}
}
func TestHeaderLen(t *testing.T) {
tests := []struct {
c chunkType
n int
}{
{cEOS, 1}, {cU, 3}, {cUD, 3}, {cL, 5}, {cLR, 5}, {cLRN, 6},
{cLRND, 6},
}
for _, tc := range tests {
n := headerLen(tc.c)
if n != tc.n {
t.Errorf("header length for %s %d; want %d",
tc.c, n, tc.n)
}
}
}
func chunkHeaderSamples(t *testing.T) []chunkHeader {
_ = t
props := Properties{LC: 3, LP: 0, PB: 2}
headers := make([]chunkHeader, 0, 12)
for c := cEOS; c <= cLRND; c++ {
var h chunkHeader
h.ctype = c
if c >= cUD {
h.uncompressed = 0x0304
}
if c >= cL {
h.compressed = 0x0201
}
if c >= cLRN {
h.props = props
}
headers = append(headers, h)
}
return headers
}
func TestChunkHeaderMarshalling(t *testing.T) {
for _, h := range chunkHeaderSamples(t) {
data, err := h.MarshalBinary()
if err != nil {
t.Fatalf("MarshalBinary for %v error %s", h, err)
}
var g chunkHeader
if err = g.UnmarshalBinary(data); err != nil {
t.Fatalf("UnmarshalBinary error %s", err)
}
if g != h {
t.Fatalf("got %v; want %v", g, h)
}
}
}
func TestReadChunkHeader(t *testing.T) {
for _, h := range chunkHeaderSamples(t) {
data, err := h.MarshalBinary()
if err != nil {
t.Fatalf("MarshalBinary for %v error %s", h, err)
}
r := bytes.NewReader(data)
g, err := readChunkHeader(r)
if err != nil {
t.Fatalf("readChunkHeader for %v error %s", h, err)
}
if *g != h {
t.Fatalf("got %v; want %v", g, h)
}
}
}
func TestReadEOS(t *testing.T) {
var b [1]byte
r := bytes.NewReader(b[:])
h, err := readChunkHeader(r)
if err != nil {
t.Fatalf("readChunkHeader error %s", err)
}
if h.ctype != cEOS {
t.Errorf("ctype got %s; want %s", h.ctype, cEOS)
}
if h.compressed != 0 {
t.Errorf("compressed got %d; want %d", h.compressed, 0)
}
if h.uncompressed != 0 {
t.Errorf("uncompressed got %d; want %d", h.uncompressed, 0)
}
wantProps := Properties{}
if h.props != wantProps {
t.Errorf("props got %v; want %v", h.props, wantProps)
}
}
|
