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
|
package destination
import (
"fmt"
"io"
"strings"
"testing"
"testing/iotest"
"github.com/stretchr/testify/require"
)
func TestHardLimitReader(t *testing.T) {
const text = "hello world"
r := iotest.OneByteReader(
&hardLimitReader{
r: strings.NewReader(text),
n: int64(len(text)),
},
)
out, err := io.ReadAll(r)
require.NoError(t, err)
require.Equal(t, text, string(out))
}
func TestHardLimitReaderFail(t *testing.T) {
const text = "hello world"
for bufSize := len(text) / 2; bufSize < len(text)*2; bufSize++ {
t.Run(fmt.Sprintf("bufsize:%d", bufSize), func(t *testing.T) {
r := &hardLimitReader{
r: iotest.DataErrReader(strings.NewReader(text)),
n: int64(len(text)) - 1,
}
buf := make([]byte, bufSize)
var err error
for i := 0; err == nil && i < 1000; i++ {
_, err = r.Read(buf)
}
require.Equal(t, ErrEntityTooLarge, err)
})
}
}
|
