File size: 3,531 Bytes
04dc9f2 | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 | // Copyright 2019 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package iotest
import (
"bytes"
"errors"
"fmt"
"log"
"strings"
"testing"
)
type errWriter struct {
err error
}
func (w errWriter) Write([]byte) (int, error) {
return 0, w.err
}
func TestWriteLogger(t *testing.T) {
olw := log.Writer()
olf := log.Flags()
olp := log.Prefix()
// Revert the original log settings before we exit.
defer func() {
log.SetFlags(olf)
log.SetPrefix(olp)
log.SetOutput(olw)
}()
lOut := new(strings.Builder)
log.SetPrefix("lw: ")
log.SetOutput(lOut)
log.SetFlags(0)
lw := new(strings.Builder)
wl := NewWriteLogger("write:", lw)
if _, err := wl.Write([]byte("Hello, World!")); err != nil {
t.Fatalf("Unexpectedly failed to write: %v", err)
}
if g, w := lw.String(), "Hello, World!"; g != w {
t.Errorf("WriteLogger mismatch\n\tgot: %q\n\twant: %q", g, w)
}
wantLogWithHex := fmt.Sprintf("lw: write: %x\n", "Hello, World!")
if g, w := lOut.String(), wantLogWithHex; g != w {
t.Errorf("WriteLogger mismatch\n\tgot: %q\n\twant: %q", g, w)
}
}
func TestWriteLogger_errorOnWrite(t *testing.T) {
olw := log.Writer()
olf := log.Flags()
olp := log.Prefix()
// Revert the original log settings before we exit.
defer func() {
log.SetFlags(olf)
log.SetPrefix(olp)
log.SetOutput(olw)
}()
lOut := new(strings.Builder)
log.SetPrefix("lw: ")
log.SetOutput(lOut)
log.SetFlags(0)
lw := errWriter{err: errors.New("Write Error!")}
wl := NewWriteLogger("write:", lw)
if _, err := wl.Write([]byte("Hello, World!")); err == nil {
t.Fatalf("Unexpectedly succeeded to write: %v", err)
}
wantLogWithHex := fmt.Sprintf("lw: write: %x: %v\n", "", "Write Error!")
if g, w := lOut.String(), wantLogWithHex; g != w {
t.Errorf("WriteLogger mismatch\n\tgot: %q\n\twant: %q", g, w)
}
}
func TestReadLogger(t *testing.T) {
olw := log.Writer()
olf := log.Flags()
olp := log.Prefix()
// Revert the original log settings before we exit.
defer func() {
log.SetFlags(olf)
log.SetPrefix(olp)
log.SetOutput(olw)
}()
lOut := new(strings.Builder)
log.SetPrefix("lr: ")
log.SetOutput(lOut)
log.SetFlags(0)
data := []byte("Hello, World!")
p := make([]byte, len(data))
lr := bytes.NewReader(data)
rl := NewReadLogger("read:", lr)
n, err := rl.Read(p)
if err != nil {
t.Fatalf("Unexpectedly failed to read: %v", err)
}
if g, w := p[:n], data; !bytes.Equal(g, w) {
t.Errorf("ReadLogger mismatch\n\tgot: %q\n\twant: %q", g, w)
}
wantLogWithHex := fmt.Sprintf("lr: read: %x\n", "Hello, World!")
if g, w := lOut.String(), wantLogWithHex; g != w {
t.Errorf("ReadLogger mismatch\n\tgot: %q\n\twant: %q", g, w)
}
}
func TestReadLogger_errorOnRead(t *testing.T) {
olw := log.Writer()
olf := log.Flags()
olp := log.Prefix()
// Revert the original log settings before we exit.
defer func() {
log.SetFlags(olf)
log.SetPrefix(olp)
log.SetOutput(olw)
}()
lOut := new(strings.Builder)
log.SetPrefix("lr: ")
log.SetOutput(lOut)
log.SetFlags(0)
data := []byte("Hello, World!")
p := make([]byte, len(data))
lr := ErrReader(errors.New("io failure"))
rl := NewReadLogger("read", lr)
n, err := rl.Read(p)
if err == nil {
t.Fatalf("Unexpectedly succeeded to read: %v", err)
}
wantLogWithHex := fmt.Sprintf("lr: read %x: io failure\n", p[:n])
if g, w := lOut.String(), wantLogWithHex; g != w {
t.Errorf("ReadLogger mismatch\n\tgot: %q\n\twant: %q", g, w)
}
}
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