github.com/pmorton/docker@v1.5.0/pkg/ioutils/readers_test.go (about)

     1  package ioutils
     2  
     3  import (
     4  	"bytes"
     5  	"io"
     6  	"io/ioutil"
     7  	"testing"
     8  )
     9  
    10  func TestBufReader(t *testing.T) {
    11  	reader, writer := io.Pipe()
    12  	bufreader := NewBufReader(reader)
    13  
    14  	// Write everything down to a Pipe
    15  	// Usually, a pipe should block but because of the buffered reader,
    16  	// the writes will go through
    17  	done := make(chan bool)
    18  	go func() {
    19  		writer.Write([]byte("hello world"))
    20  		writer.Close()
    21  		done <- true
    22  	}()
    23  
    24  	// Drain the reader *after* everything has been written, just to verify
    25  	// it is indeed buffering
    26  	<-done
    27  	output, err := ioutil.ReadAll(bufreader)
    28  	if err != nil {
    29  		t.Fatal(err)
    30  	}
    31  	if !bytes.Equal(output, []byte("hello world")) {
    32  		t.Error(string(output))
    33  	}
    34  }