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// Copyright The OpenTelemetry Authors
// SPDX-License-Identifier: Apache-2.0
package request
import (
"errors"
"io"
"strings"
"testing"
"time"
"github.com/stretchr/testify/assert"
"github.com/stretchr/testify/require"
)
var errFirstCall = errors.New("first call")
func TestBodyWrapper(t *testing.T) {
bw := NewBodyWrapper(io.NopCloser(strings.NewReader("hello world")), func(int64) {})
data, err := io.ReadAll(bw)
require.NoError(t, err)
assert.Equal(t, "hello world", string(data))
assert.Equal(t, int64(11), bw.BytesRead())
assert.Equal(t, io.EOF, bw.Error())
}
type multipleErrorsReader struct {
calls int
}
type errorWrapper struct{}
func (errorWrapper) Error() string {
return "subsequent calls"
}
func (mer *multipleErrorsReader) Read([]byte) (int, error) {
mer.calls = mer.calls + 1
if mer.calls == 1 {
return 0, errFirstCall
}
return 0, errorWrapper{}
}
func TestBodyWrapperWithErrors(t *testing.T) {
bw := NewBodyWrapper(io.NopCloser(&multipleErrorsReader{}), func(int64) {})
data, err := io.ReadAll(bw)
require.Equal(t, errFirstCall, err)
assert.Equal(t, "", string(data))
require.Equal(t, errFirstCall, bw.Error())
data, err = io.ReadAll(bw)
require.Equal(t, errorWrapper{}, err)
assert.Equal(t, "", string(data))
require.Equal(t, errorWrapper{}, bw.Error())
}
func TestConcurrentBodyWrapper(t *testing.T) {
bw := NewBodyWrapper(io.NopCloser(strings.NewReader("hello world")), func(int64) {})
go func() {
_, _ = io.ReadAll(bw)
}()
assert.NotNil(t, bw.BytesRead())
assert.Eventually(t, func() bool {
return errors.Is(bw.Error(), io.EOF)
}, time.Second, 10*time.Millisecond)
}
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