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