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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
|
package plumbing_test
import (
"bytes"
"errors"
"io"
"testing"
"github.com/bodgit/plumbing"
"github.com/stretchr/testify/assert"
)
var errClose = errors.New("error closing")
type errorWriteCloser struct {
io.WriteCloser
}
func (errorWriteCloser) Write(p []byte) (n int, err error) {
return len(p), nil
}
func (errorWriteCloser) Close() error {
return errClose
}
type partialWriter struct {
io.Writer
}
func (partialWriter) Write(p []byte) (n int, err error) {
return len(p) - 1, nil
}
//nolint:funlen
func TestMultiWriteCloser(t *testing.T) {
t.Parallel()
in := []byte("abcdefghij")
tables := []struct {
name string
writer io.WriteCloser
n int
writeErr error
closeErr error
}{
{
"success",
plumbing.NopWriteCloser(new(bytes.Buffer)),
10,
nil,
nil,
},
{
"nested",
plumbing.MultiWriteCloser(plumbing.NopWriteCloser(new(bytes.Buffer))),
10,
nil,
nil,
},
{
"write",
plumbing.NopWriteCloser(errorWriter{}),
0,
errWrite,
nil,
},
{
"close",
errorWriteCloser{},
10,
nil,
errClose,
},
{
"partial",
plumbing.NopWriteCloser(partialWriter{}),
9,
io.ErrShortWrite,
nil,
},
}
for _, table := range tables {
table := table
t.Run(table.name, func(t *testing.T) {
t.Parallel()
dst := plumbing.NopWriteCloser(new(bytes.Buffer))
w := plumbing.MultiWriteCloser(table.writer, dst)
n, err := w.Write(in)
assert.Equal(t, table.n, n)
assert.Equal(t, table.writeErr, err)
err = w.Close()
assert.Equal(t, table.closeErr, err)
})
}
}
type errorReadCloser struct {
io.Reader
}
func (errorReadCloser) Close() error {
return errClose
}
type earlyEOFBytesReader struct {
r *bytes.Reader
}
func (r *earlyEOFBytesReader) Read(p []byte) (n int, err error) {
n, err = r.r.Read(p)
// Return an early EOF when bytes have been read and there's none left
if n > 0 && err == nil && r.r.Len() == 0 {
err = io.EOF
}
return
}
func TestMultiReadCloser(t *testing.T) {
t.Parallel()
tables := []struct {
name string
readers []io.ReadCloser
n int64
expected []byte
readErr error
closeErr error
}{
{
"success",
[]io.ReadCloser{
io.NopCloser(&earlyEOFBytesReader{bytes.NewReader([]byte("abcde"))}),
io.NopCloser(bytes.NewReader([]byte("fghij"))),
},
10,
[]byte("abcdefghij"),
nil,
nil,
},
{
"nested",
[]io.ReadCloser{
plumbing.MultiReadCloser(io.NopCloser(bytes.NewReader([]byte("abcdefghij")))),
},
10,
[]byte("abcdefghij"),
nil,
nil,
},
{
"close",
[]io.ReadCloser{
io.NopCloser(bytes.NewReader([]byte("abcde"))),
&errorReadCloser{bytes.NewReader([]byte("fghij"))},
},
10,
[]byte("abcdefghij"),
nil,
errClose,
},
}
for _, table := range tables {
table := table
t.Run(table.name, func(t *testing.T) {
t.Parallel()
r := plumbing.MultiReadCloser(table.readers...)
b := new(bytes.Buffer)
n, err := io.Copy(b, r)
assert.Equal(t, table.n, n)
assert.Equal(t, table.readErr, err)
assert.Equal(t, table.expected, b.Bytes())
err = r.Close()
assert.Equal(t, table.closeErr, err)
})
}
}
|
