/usr/share/gocode/src/github.com/fsouza/go-dockerclient/external/github.com/docker/docker/pkg/ioutils/multireader_test.go is in golang-github-fsouza-go-dockerclient-dev 0.0+git20150905-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 | package ioutils
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"os"
"strings"
"testing"
)
func TestMultiReadSeekerReadAll(t *testing.T) {
str := "hello world"
s1 := strings.NewReader(str + " 1")
s2 := strings.NewReader(str + " 2")
s3 := strings.NewReader(str + " 3")
mr := MultiReadSeeker(s1, s2, s3)
expectedSize := int64(s1.Len() + s2.Len() + s3.Len())
b, err := ioutil.ReadAll(mr)
if err != nil {
t.Fatal(err)
}
expected := "hello world 1hello world 2hello world 3"
if string(b) != expected {
t.Fatalf("ReadAll failed, got: %q, expected %q", string(b), expected)
}
size, err := mr.Seek(0, os.SEEK_END)
if err != nil {
t.Fatal(err)
}
if size != expectedSize {
t.Fatalf("reader size does not match, got %d, expected %d", size, expectedSize)
}
// Reset the position and read again
pos, err := mr.Seek(0, os.SEEK_SET)
if err != nil {
t.Fatal(err)
}
if pos != 0 {
t.Fatalf("expected position to be set to 0, got %d", pos)
}
b, err = ioutil.ReadAll(mr)
if err != nil {
t.Fatal(err)
}
if string(b) != expected {
t.Fatalf("ReadAll failed, got: %q, expected %q", string(b), expected)
}
}
func TestMultiReadSeekerReadEach(t *testing.T) {
str := "hello world"
s1 := strings.NewReader(str + " 1")
s2 := strings.NewReader(str + " 2")
s3 := strings.NewReader(str + " 3")
mr := MultiReadSeeker(s1, s2, s3)
var totalBytes int64
for i, s := range []*strings.Reader{s1, s2, s3} {
sLen := int64(s.Len())
buf := make([]byte, s.Len())
expected := []byte(fmt.Sprintf("%s %d", str, i+1))
if _, err := mr.Read(buf); err != nil && err != io.EOF {
t.Fatal(err)
}
if !bytes.Equal(buf, expected) {
t.Fatalf("expected %q to be %q", string(buf), string(expected))
}
pos, err := mr.Seek(0, os.SEEK_CUR)
if err != nil {
t.Fatalf("iteration: %d, error: %v", i+1, err)
}
// check that the total bytes read is the current position of the seeker
totalBytes += sLen
if pos != totalBytes {
t.Fatalf("expected current position to be: %d, got: %d, iteration: %d", totalBytes, pos, i+1)
}
// This tests not only that SEEK_SET and SEEK_CUR give the same values, but that the next iteration is in the expected position as well
newPos, err := mr.Seek(pos, os.SEEK_SET)
if err != nil {
t.Fatal(err)
}
if newPos != pos {
t.Fatalf("expected to get same position when calling SEEK_SET with value from SEEK_CUR, cur: %d, set: %d", pos, newPos)
}
}
}
func TestMultiReadSeekerReadSpanningChunks(t *testing.T) {
str := "hello world"
s1 := strings.NewReader(str + " 1")
s2 := strings.NewReader(str + " 2")
s3 := strings.NewReader(str + " 3")
mr := MultiReadSeeker(s1, s2, s3)
buf := make([]byte, s1.Len()+3)
_, err := mr.Read(buf)
if err != nil {
t.Fatal(err)
}
// expected is the contents of s1 + 3 bytes from s2, ie, the `hel` at the end of this string
expected := "hello world 1hel"
if string(buf) != expected {
t.Fatalf("expected %s to be %s", string(buf), expected)
}
}
func TestMultiReadSeekerNegativeSeek(t *testing.T) {
str := "hello world"
s1 := strings.NewReader(str + " 1")
s2 := strings.NewReader(str + " 2")
s3 := strings.NewReader(str + " 3")
mr := MultiReadSeeker(s1, s2, s3)
s1Len := s1.Len()
s2Len := s2.Len()
s3Len := s3.Len()
s, err := mr.Seek(int64(-1*s3.Len()), os.SEEK_END)
if err != nil {
t.Fatal(err)
}
if s != int64(s1Len+s2Len) {
t.Fatalf("expected %d to be %d", s, s1.Len()+s2.Len())
}
buf := make([]byte, s3Len)
if _, err := mr.Read(buf); err != nil && err != io.EOF {
t.Fatal(err)
}
expected := fmt.Sprintf("%s %d", str, 3)
if string(buf) != fmt.Sprintf("%s %d", str, 3) {
t.Fatalf("expected %q to be %q", string(buf), expected)
}
}
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