github.com/nf/docker@v1.8.1/pkg/progressreader/progressreader_test.go (about)

     1  package progressreader
     2  
     3  import (
     4  	"bufio"
     5  	"bytes"
     6  	"io"
     7  	"io/ioutil"
     8  	"testing"
     9  
    10  	"github.com/docker/docker/pkg/streamformatter"
    11  )
    12  
    13  func TestOutputOnPrematureClose(t *testing.T) {
    14  	var outBuf bytes.Buffer
    15  	content := []byte("TESTING")
    16  	reader := ioutil.NopCloser(bytes.NewReader(content))
    17  	writer := bufio.NewWriter(&outBuf)
    18  
    19  	prCfg := Config{
    20  		In:        reader,
    21  		Out:       writer,
    22  		Formatter: streamformatter.NewStreamFormatter(),
    23  		Size:      len(content),
    24  		NewLines:  true,
    25  		ID:        "Test",
    26  		Action:    "Read",
    27  	}
    28  	pr := New(prCfg)
    29  
    30  	part := make([]byte, 4, 4)
    31  	_, err := io.ReadFull(pr, part)
    32  	if err != nil {
    33  		pr.Close()
    34  		t.Fatal(err)
    35  	}
    36  
    37  	if err := writer.Flush(); err != nil {
    38  		pr.Close()
    39  		t.Fatal(err)
    40  	}
    41  
    42  	tlen := outBuf.Len()
    43  	pr.Close()
    44  	if err := writer.Flush(); err != nil {
    45  		t.Fatal(err)
    46  	}
    47  
    48  	if outBuf.Len() == tlen {
    49  		t.Fatalf("Expected some output when closing prematurely")
    50  	}
    51  }
    52  
    53  func TestCompleteSilently(t *testing.T) {
    54  	var outBuf bytes.Buffer
    55  	content := []byte("TESTING")
    56  	reader := ioutil.NopCloser(bytes.NewReader(content))
    57  	writer := bufio.NewWriter(&outBuf)
    58  
    59  	prCfg := Config{
    60  		In:        reader,
    61  		Out:       writer,
    62  		Formatter: streamformatter.NewStreamFormatter(),
    63  		Size:      len(content),
    64  		NewLines:  true,
    65  		ID:        "Test",
    66  		Action:    "Read",
    67  	}
    68  	pr := New(prCfg)
    69  
    70  	out, err := ioutil.ReadAll(pr)
    71  	if err != nil {
    72  		pr.Close()
    73  		t.Fatal(err)
    74  	}
    75  	if string(out) != "TESTING" {
    76  		pr.Close()
    77  		t.Fatalf("Unexpected output %q from reader", string(out))
    78  	}
    79  
    80  	if err := writer.Flush(); err != nil {
    81  		pr.Close()
    82  		t.Fatal(err)
    83  	}
    84  
    85  	tlen := outBuf.Len()
    86  	pr.Close()
    87  	if err := writer.Flush(); err != nil {
    88  		t.Fatal(err)
    89  	}
    90  
    91  	if outBuf.Len() > tlen {
    92  		t.Fatalf("Should have closed silently when read is complete")
    93  	}
    94  }