-
Notifications
You must be signed in to change notification settings - Fork 0
/
file_test.go
64 lines (48 loc) · 1.18 KB
/
file_test.go
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
package capacityfs
import (
"io"
"os"
"testing"
"github.com/matryer/is"
"github.com/spf13/afero"
)
type badTruncater struct {
afero.File
}
func (*badTruncater) Truncate(size int64) error {
return io.ErrUnexpectedEOF
}
func TestFileSize(t *testing.T) {
is := is.New(t)
afs := afero.NewMemMapFs()
is.NoErr(afero.WriteFile(afs, "ok.txt", []byte("asdf"), 0755))
file, err := afs.OpenFile("ok.txt", os.O_CREATE|os.O_RDWR, 0755)
is.NoErr(err)
hasEnoughCapacity := true
capacity := int64(0)
fi := &fileSize{
File: file,
hasEnoughCapacity: func(i int64) bool { return hasEnoughCapacity },
addCapacity: func(i int64) {
capacity += i
},
}
hasEnoughCapacity = false
_, err = fi.Write([]byte("new"))
is.Equal(err, ErrNotEnoughCapacity)
_, err = fi.WriteAt([]byte("new"), 2)
is.Equal(err, ErrNotEnoughCapacity)
hasEnoughCapacity = true
_, err = fi.Write([]byte("new"))
is.NoErr(err)
is.Equal(capacity, int64(3))
_, err = fi.WriteAt([]byte("new"), 0)
is.NoErr(err)
is.Equal(capacity, int64(6))
fi.File = &badTruncater{file}
is.Equal(fi.Truncate(6), io.ErrUnexpectedEOF)
fi.File = file
err = fi.Truncate(6)
is.NoErr(err)
is.Equal(capacity, int64(0))
}