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package request
import (
"bytes"
"io"
"math/rand"
"sync"
"testing"
"time"
"github.com/stretchr/testify/assert"
)
func TestOffsetReaderRead(t *testing.T) {
buf := []byte("testData")
reader := &offsetReader{buf: bytes.NewReader(buf)}
tempBuf := make([]byte, len(buf))
n, err := reader.Read(tempBuf)
assert.Equal(t, n, len(buf))
assert.Nil(t, err)
assert.Equal(t, buf, tempBuf)
}
func TestOffsetReaderClose(t *testing.T) {
buf := []byte("testData")
reader := &offsetReader{buf: bytes.NewReader(buf)}
err := reader.Close()
assert.Nil(t, err)
tempBuf := make([]byte, len(buf))
n, err := reader.Read(tempBuf)
assert.Equal(t, n, 0)
assert.Equal(t, err, io.EOF)
}
func TestOffsetReaderCloseAndCopy(t *testing.T) {
buf := []byte("testData")
tempBuf := make([]byte, len(buf))
reader := &offsetReader{buf: bytes.NewReader(buf)}
newReader := reader.CloseAndCopy(0)
n, err := reader.Read(tempBuf)
assert.Equal(t, n, 0)
assert.Equal(t, err, io.EOF)
n, err = newReader.Read(tempBuf)
assert.Equal(t, n, len(buf))
assert.Nil(t, err)
assert.Equal(t, buf, tempBuf)
}
func TestOffsetReaderCloseAndCopyOffset(t *testing.T) {
buf := []byte("testData")
tempBuf := make([]byte, len(buf))
reader := &offsetReader{buf: bytes.NewReader(buf)}
newReader := reader.CloseAndCopy(4)
n, err := newReader.Read(tempBuf)
assert.Equal(t, n, len(buf)-4)
assert.Nil(t, err)
expected := []byte{'D', 'a', 't', 'a', 0, 0, 0, 0}
assert.Equal(t, expected, tempBuf)
}
func TestOffsetReaderRace(t *testing.T) {
wg := sync.WaitGroup{}
f := func(reader *offsetReader) {
defer wg.Done()
var err error
buf := make([]byte, 1)
_, err = reader.Read(buf)
for err != io.EOF {
_, err = reader.Read(buf)
}
}
closeFn := func(reader *offsetReader) {
defer wg.Done()
time.Sleep(time.Duration(rand.Intn(20)+1) * time.Millisecond)
reader.Close()
}
for i := 0; i < 50; i++ {
reader := &offsetReader{buf: bytes.NewReader(make([]byte, 1024*1024))}
wg.Add(1)
go f(reader)
wg.Add(1)
go closeFn(reader)
}
wg.Wait()
}
func BenchmarkOffsetReader(b *testing.B) {
bufSize := 1024 * 1024 * 100
buf := make([]byte, bufSize)
reader := &offsetReader{buf: bytes.NewReader(buf)}
tempBuf := make([]byte, 1024)
for i := 0; i < b.N; i++ {
reader.Read(tempBuf)
}
}
func BenchmarkBytesReader(b *testing.B) {
bufSize := 1024 * 1024 * 100
buf := make([]byte, bufSize)
reader := bytes.NewReader(buf)
tempBuf := make([]byte, 1024)
for i := 0; i < b.N; i++ {
reader.Read(tempBuf)
}
}
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