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v2fly/common/buf/writer_test.go
2022-01-02 15:16:23 +00:00

99 lines
2.3 KiB
Go

package buf_test
import (
"bufio"
"bytes"
"crypto/rand"
"io"
"testing"
"github.com/google/go-cmp/cmp"
"github.com/v2fly/v2ray-core/v5/common"
. "github.com/v2fly/v2ray-core/v5/common/buf"
"github.com/v2fly/v2ray-core/v5/transport/pipe"
)
func TestWriter(t *testing.T) {
lb := New()
common.Must2(lb.ReadFrom(rand.Reader))
expectedBytes := append([]byte(nil), lb.Bytes()...)
writeBuffer := bytes.NewBuffer(make([]byte, 0, 1024*1024))
writer := NewBufferedWriter(NewWriter(writeBuffer))
writer.SetBuffered(false)
common.Must(writer.WriteMultiBuffer(MultiBuffer{lb}))
common.Must(writer.Flush())
if r := cmp.Diff(expectedBytes, writeBuffer.Bytes()); r != "" {
t.Error(r)
}
}
func TestBytesWriterReadFrom(t *testing.T) {
const size = 50000
pReader, pWriter := pipe.New(pipe.WithSizeLimit(size))
reader := bufio.NewReader(io.LimitReader(rand.Reader, size))
writer := NewBufferedWriter(pWriter)
writer.SetBuffered(false)
nBytes, err := reader.WriteTo(writer)
if nBytes != size {
t.Fatal("unexpected size of bytes written: ", nBytes)
}
if err != nil {
t.Fatal("expect success, but actually error: ", err.Error())
}
mb, err := pReader.ReadMultiBuffer()
common.Must(err)
if mb.Len() != size {
t.Fatal("unexpected size read: ", mb.Len())
}
}
func TestDiscardBytes(t *testing.T) {
b := New()
common.Must2(b.ReadFullFrom(rand.Reader, Size))
nBytes, err := io.Copy(DiscardBytes, b)
common.Must(err)
if nBytes != Size {
t.Error("copy size: ", nBytes)
}
}
func TestDiscardBytesMultiBuffer(t *testing.T) {
const size = 10240*1024 + 1
buffer := bytes.NewBuffer(make([]byte, 0, size))
common.Must2(buffer.ReadFrom(io.LimitReader(rand.Reader, size)))
r := NewReader(buffer)
nBytes, err := io.Copy(DiscardBytes, &BufferedReader{Reader: r})
common.Must(err)
if nBytes != size {
t.Error("copy size: ", nBytes)
}
}
func TestWriterInterface(t *testing.T) {
{
var writer interface{} = (*BufferToBytesWriter)(nil)
switch writer.(type) {
case Writer, io.Writer, io.ReaderFrom:
default:
t.Error("BufferToBytesWriter is not Writer, io.Writer or io.ReaderFrom")
}
}
{
var writer interface{} = (*BufferedWriter)(nil)
switch writer.(type) {
case Writer, io.Writer, io.ReaderFrom, io.ByteWriter:
default:
t.Error("BufferedWriter is not Writer, io.Writer, io.ReaderFrom or io.ByteWriter")
}
}
}