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
155
156
157
158
159
160
161
|
package filer
import (
"fmt"
"io"
"math"
"strconv"
"sync"
"testing"
)
type mockChunkCache struct {
}
func (m *mockChunkCache) GetChunk(fileId string, minSize uint64) (data []byte) {
x, _ := strconv.Atoi(fileId)
data = make([]byte, minSize)
for i := 0; i < int(minSize); i++ {
data[i] = byte(x)
}
return data
}
func (m *mockChunkCache) GetChunkSlice(fileId string, offset, length uint64) []byte {
return nil
}
func (m *mockChunkCache) SetChunk(fileId string, data []byte) {
}
func TestReaderAt(t *testing.T) {
visibles := []VisibleInterval{
{
start: 1,
stop: 2,
fileId: "1",
chunkSize: 9,
},
{
start: 3,
stop: 4,
fileId: "3",
chunkSize: 1,
},
{
start: 5,
stop: 6,
fileId: "5",
chunkSize: 2,
},
{
start: 7,
stop: 9,
fileId: "7",
chunkSize: 2,
},
{
start: 9,
stop: 10,
fileId: "9",
chunkSize: 2,
},
}
readerAt := &ChunkReadAt{
chunkViews: ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
lookupFileId: nil,
readerLock: sync.Mutex{},
fileSize: 10,
chunkCache: &mockChunkCache{},
}
testReadAt(t, readerAt, 0, 10, 10, io.EOF)
testReadAt(t, readerAt, 0, 12, 10, io.EOF)
testReadAt(t, readerAt, 2, 8, 8, io.EOF)
testReadAt(t, readerAt, 3, 6, 6, nil)
}
func testReadAt(t *testing.T, readerAt *ChunkReadAt, offset int64, size int, expected int, expectedErr error) {
data := make([]byte, size)
n, err := readerAt.ReadAt(data, offset)
for _, d := range data {
fmt.Printf("%x", d)
}
fmt.Println()
if expected != n {
t.Errorf("unexpected read size: %d, expect: %d", n, expected)
}
if err != expectedErr {
t.Errorf("unexpected read error: %v, expect: %v", err, expectedErr)
}
}
func TestReaderAt0(t *testing.T) {
visibles := []VisibleInterval{
{
start: 2,
stop: 5,
fileId: "1",
chunkSize: 9,
},
{
start: 7,
stop: 9,
fileId: "2",
chunkSize: 9,
},
}
readerAt := &ChunkReadAt{
chunkViews: ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
lookupFileId: nil,
readerLock: sync.Mutex{},
fileSize: 10,
chunkCache: &mockChunkCache{},
}
testReadAt(t, readerAt, 0, 10, 10, io.EOF)
testReadAt(t, readerAt, 3, 16, 7, io.EOF)
testReadAt(t, readerAt, 3, 5, 5, nil)
testReadAt(t, readerAt, 11, 5, 0, io.EOF)
testReadAt(t, readerAt, 10, 5, 0, io.EOF)
}
func TestReaderAt1(t *testing.T) {
visibles := []VisibleInterval{
{
start: 2,
stop: 5,
fileId: "1",
chunkSize: 9,
},
}
readerAt := &ChunkReadAt{
chunkViews: ViewFromVisibleIntervals(visibles, 0, math.MaxInt64),
lookupFileId: nil,
readerLock: sync.Mutex{},
fileSize: 20,
chunkCache: &mockChunkCache{},
}
testReadAt(t, readerAt, 0, 20, 20, io.EOF)
testReadAt(t, readerAt, 1, 7, 7, nil)
testReadAt(t, readerAt, 0, 1, 1, nil)
testReadAt(t, readerAt, 18, 4, 2, io.EOF)
testReadAt(t, readerAt, 12, 4, 4, nil)
testReadAt(t, readerAt, 4, 20, 16, io.EOF)
testReadAt(t, readerAt, 4, 10, 10, nil)
testReadAt(t, readerAt, 1, 10, 10, nil)
}
|
