github.com/xmplusdev/xmcore@v1.8.11-0.20240412132628-5518b55526af/common/buf/writer_test.go (about)

     1  package buf_test
     2  
     3  import (
     4  	"bufio"
     5  	"bytes"
     6  	"crypto/rand"
     7  	"io"
     8  	"testing"
     9  
    10  	"github.com/google/go-cmp/cmp"
    11  	"github.com/xmplusdev/xmcore/common"
    12  	. "github.com/xmplusdev/xmcore/common/buf"
    13  	"github.com/xmplusdev/xmcore/transport/pipe"
    14  )
    15  
    16  func TestWriter(t *testing.T) {
    17  	lb := New()
    18  	common.Must2(lb.ReadFrom(rand.Reader))
    19  
    20  	expectedBytes := append([]byte(nil), lb.Bytes()...)
    21  
    22  	writeBuffer := bytes.NewBuffer(make([]byte, 0, 1024*1024))
    23  
    24  	writer := NewBufferedWriter(NewWriter(writeBuffer))
    25  	writer.SetBuffered(false)
    26  	common.Must(writer.WriteMultiBuffer(MultiBuffer{lb}))
    27  	common.Must(writer.Flush())
    28  
    29  	if r := cmp.Diff(expectedBytes, writeBuffer.Bytes()); r != "" {
    30  		t.Error(r)
    31  	}
    32  }
    33  
    34  func TestBytesWriterReadFrom(t *testing.T) {
    35  	const size = 50000
    36  	pReader, pWriter := pipe.New(pipe.WithSizeLimit(size))
    37  	reader := bufio.NewReader(io.LimitReader(rand.Reader, size))
    38  	writer := NewBufferedWriter(pWriter)
    39  	writer.SetBuffered(false)
    40  	nBytes, err := reader.WriteTo(writer)
    41  	if nBytes != size {
    42  		t.Fatal("unexpected size of bytes written: ", nBytes)
    43  	}
    44  	if err != nil {
    45  		t.Fatal("expect success, but actually error: ", err.Error())
    46  	}
    47  
    48  	mb, err := pReader.ReadMultiBuffer()
    49  	common.Must(err)
    50  	if mb.Len() != size {
    51  		t.Fatal("unexpected size read: ", mb.Len())
    52  	}
    53  }
    54  
    55  func TestDiscardBytes(t *testing.T) {
    56  	b := New()
    57  	common.Must2(b.ReadFullFrom(rand.Reader, Size))
    58  
    59  	nBytes, err := io.Copy(DiscardBytes, b)
    60  	common.Must(err)
    61  	if nBytes != Size {
    62  		t.Error("copy size: ", nBytes)
    63  	}
    64  }
    65  
    66  func TestDiscardBytesMultiBuffer(t *testing.T) {
    67  	const size = 10240*1024 + 1
    68  	buffer := bytes.NewBuffer(make([]byte, 0, size))
    69  	common.Must2(buffer.ReadFrom(io.LimitReader(rand.Reader, size)))
    70  
    71  	r := NewReader(buffer)
    72  	nBytes, err := io.Copy(DiscardBytes, &BufferedReader{Reader: r})
    73  	common.Must(err)
    74  	if nBytes != size {
    75  		t.Error("copy size: ", nBytes)
    76  	}
    77  }
    78  
    79  func TestWriterInterface(t *testing.T) {
    80  	{
    81  		var writer interface{} = (*BufferToBytesWriter)(nil)
    82  		switch writer.(type) {
    83  		case Writer, io.Writer, io.ReaderFrom:
    84  		default:
    85  			t.Error("BufferToBytesWriter is not Writer, io.Writer or io.ReaderFrom")
    86  		}
    87  	}
    88  
    89  	{
    90  		var writer interface{} = (*BufferedWriter)(nil)
    91  		switch writer.(type) {
    92  		case Writer, io.Writer, io.ReaderFrom, io.ByteWriter:
    93  		default:
    94  			t.Error("BufferedWriter is not Writer, io.Writer, io.ReaderFrom or io.ByteWriter")
    95  		}
    96  	}
    97  }