368 lines
9.1 KiB
Go
Executable File
368 lines
9.1 KiB
Go
Executable File
// Copyright 2016 Google Inc. All Rights Reserved.
|
|
//
|
|
// Distributed under MIT license.
|
|
// See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
|
|
|
|
package brotli
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"io/ioutil"
|
|
"math"
|
|
"math/rand"
|
|
"testing"
|
|
"time"
|
|
)
|
|
|
|
func checkCompressedData(compressedData, wantOriginalData []byte) error {
|
|
uncompressed, err := Decode(compressedData)
|
|
if err != nil {
|
|
return fmt.Errorf("brotli decompress failed: %v", err)
|
|
}
|
|
if !bytes.Equal(uncompressed, wantOriginalData) {
|
|
if len(wantOriginalData) != len(uncompressed) {
|
|
return fmt.Errorf(""+
|
|
"Data doesn't uncompress to the original value.\n"+
|
|
"Length of original: %v\n"+
|
|
"Length of uncompressed: %v",
|
|
len(wantOriginalData), len(uncompressed))
|
|
}
|
|
for i := range wantOriginalData {
|
|
if wantOriginalData[i] != uncompressed[i] {
|
|
return fmt.Errorf(""+
|
|
"Data doesn't uncompress to the original value.\n"+
|
|
"Original at %v is %v\n"+
|
|
"Uncompressed at %v is %v",
|
|
i, wantOriginalData[i], i, uncompressed[i])
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func TestEncoderNoWrite(t *testing.T) {
|
|
out := bytes.Buffer{}
|
|
e := NewWriter(&out, WriterOptions{Quality: 5})
|
|
if err := e.Close(); err != nil {
|
|
t.Errorf("Close()=%v, want nil", err)
|
|
}
|
|
// Check Write after close.
|
|
if _, err := e.Write([]byte("hi")); err == nil {
|
|
t.Errorf("No error after Close() + Write()")
|
|
}
|
|
}
|
|
|
|
func TestEncoderEmptyWrite(t *testing.T) {
|
|
out := bytes.Buffer{}
|
|
e := NewWriter(&out, WriterOptions{Quality: 5})
|
|
n, err := e.Write([]byte(""))
|
|
if n != 0 || err != nil {
|
|
t.Errorf("Write()=%v,%v, want 0, nil", n, err)
|
|
}
|
|
if err := e.Close(); err != nil {
|
|
t.Errorf("Close()=%v, want nil", err)
|
|
}
|
|
}
|
|
|
|
func TestWriter(t *testing.T) {
|
|
// Test basic encoder usage.
|
|
input := []byte("<html><body><H1>Hello world</H1></body></html>")
|
|
out := bytes.Buffer{}
|
|
e := NewWriter(&out, WriterOptions{Quality: 1})
|
|
in := bytes.NewReader([]byte(input))
|
|
n, err := io.Copy(e, in)
|
|
if err != nil {
|
|
t.Errorf("Copy Error: %v", err)
|
|
}
|
|
if int(n) != len(input) {
|
|
t.Errorf("Copy() n=%v, want %v", n, len(input))
|
|
}
|
|
if err := e.Close(); err != nil {
|
|
t.Errorf("Close Error after copied %d bytes: %v", n, err)
|
|
}
|
|
if err := checkCompressedData(out.Bytes(), input); err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
|
|
func TestEncoderStreams(t *testing.T) {
|
|
// Test that output is streamed.
|
|
// Adjust window size to ensure the encoder outputs at least enough bytes
|
|
// to fill the window.
|
|
const lgWin = 16
|
|
windowSize := int(math.Pow(2, lgWin))
|
|
input := make([]byte, 8*windowSize)
|
|
rand.Read(input)
|
|
out := bytes.Buffer{}
|
|
e := NewWriter(&out, WriterOptions{Quality: 11, LGWin: lgWin})
|
|
halfInput := input[:len(input)/2]
|
|
in := bytes.NewReader(halfInput)
|
|
|
|
n, err := io.Copy(e, in)
|
|
if err != nil {
|
|
t.Errorf("Copy Error: %v", err)
|
|
}
|
|
|
|
// We've fed more data than the sliding window size. Check that some
|
|
// compressed data has been output.
|
|
if out.Len() == 0 {
|
|
t.Errorf("Output length is 0 after %d bytes written", n)
|
|
}
|
|
if err := e.Close(); err != nil {
|
|
t.Errorf("Close Error after copied %d bytes: %v", n, err)
|
|
}
|
|
if err := checkCompressedData(out.Bytes(), halfInput); err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
|
|
func TestEncoderLargeInput(t *testing.T) {
|
|
input := make([]byte, 1000000)
|
|
rand.Read(input)
|
|
out := bytes.Buffer{}
|
|
e := NewWriter(&out, WriterOptions{Quality: 5})
|
|
in := bytes.NewReader(input)
|
|
|
|
n, err := io.Copy(e, in)
|
|
if err != nil {
|
|
t.Errorf("Copy Error: %v", err)
|
|
}
|
|
if int(n) != len(input) {
|
|
t.Errorf("Copy() n=%v, want %v", n, len(input))
|
|
}
|
|
if err := e.Close(); err != nil {
|
|
t.Errorf("Close Error after copied %d bytes: %v", n, err)
|
|
}
|
|
if err := checkCompressedData(out.Bytes(), input); err != nil {
|
|
t.Error(err)
|
|
}
|
|
}
|
|
|
|
func TestEncoderFlush(t *testing.T) {
|
|
input := make([]byte, 1000)
|
|
rand.Read(input)
|
|
out := bytes.Buffer{}
|
|
e := NewWriter(&out, WriterOptions{Quality: 5})
|
|
in := bytes.NewReader(input)
|
|
_, err := io.Copy(e, in)
|
|
if err != nil {
|
|
t.Fatalf("Copy Error: %v", err)
|
|
}
|
|
if err := e.Flush(); err != nil {
|
|
t.Fatalf("Flush(): %v", err)
|
|
}
|
|
if out.Len() == 0 {
|
|
t.Fatalf("0 bytes written after Flush()")
|
|
}
|
|
decompressed := make([]byte, 1000)
|
|
reader := NewReader(bytes.NewReader(out.Bytes()))
|
|
n, err := reader.Read(decompressed)
|
|
if n != len(decompressed) || err != nil {
|
|
t.Errorf("Expected <%v, nil>, but <%v, %v>", len(decompressed), n, err)
|
|
}
|
|
reader.Close()
|
|
if !bytes.Equal(decompressed, input) {
|
|
t.Errorf(""+
|
|
"Decompress after flush: %v\n"+
|
|
"%q\n"+
|
|
"want:\n%q",
|
|
err, decompressed, input)
|
|
}
|
|
if err := e.Close(); err != nil {
|
|
t.Errorf("Close(): %v", err)
|
|
}
|
|
}
|
|
|
|
type readerWithTimeout struct {
|
|
io.ReadCloser
|
|
}
|
|
|
|
func (r readerWithTimeout) Read(p []byte) (int, error) {
|
|
type result struct {
|
|
n int
|
|
err error
|
|
}
|
|
ch := make(chan result)
|
|
go func() {
|
|
n, err := r.ReadCloser.Read(p)
|
|
ch <- result{n, err}
|
|
}()
|
|
select {
|
|
case result := <-ch:
|
|
return result.n, result.err
|
|
case <-time.After(5 * time.Second):
|
|
return 0, fmt.Errorf("read timed out")
|
|
}
|
|
}
|
|
|
|
func TestDecoderStreaming(t *testing.T) {
|
|
pr, pw := io.Pipe()
|
|
writer := NewWriter(pw, WriterOptions{Quality: 5, LGWin: 20})
|
|
reader := readerWithTimeout{NewReader(pr)}
|
|
defer func() {
|
|
if err := reader.Close(); err != nil {
|
|
t.Errorf("reader.Close: %v", err)
|
|
}
|
|
go ioutil.ReadAll(pr) // swallow the "EOF" token from writer.Close
|
|
if err := writer.Close(); err != nil {
|
|
t.Errorf("writer.Close: %v", err)
|
|
}
|
|
}()
|
|
|
|
ch := make(chan []byte)
|
|
errch := make(chan error)
|
|
go func() {
|
|
for {
|
|
segment, ok := <-ch
|
|
if !ok {
|
|
return
|
|
}
|
|
if n, err := writer.Write(segment); err != nil || n != len(segment) {
|
|
errch <- fmt.Errorf("write=%v,%v, want %v,%v", n, err, len(segment), nil)
|
|
return
|
|
}
|
|
if err := writer.Flush(); err != nil {
|
|
errch <- fmt.Errorf("flush: %v", err)
|
|
return
|
|
}
|
|
}
|
|
}()
|
|
defer close(ch)
|
|
|
|
segments := [...][]byte{
|
|
[]byte("first"),
|
|
[]byte("second"),
|
|
[]byte("third"),
|
|
}
|
|
for k, segment := range segments {
|
|
t.Run(fmt.Sprintf("Segment%d", k), func(t *testing.T) {
|
|
select {
|
|
case ch <- segment:
|
|
case err := <-errch:
|
|
t.Fatalf("write: %v", err)
|
|
case <-time.After(5 * time.Second):
|
|
t.Fatalf("timed out")
|
|
}
|
|
wantLen := len(segment)
|
|
got := make([]byte, wantLen)
|
|
if n, err := reader.Read(got); err != nil || n != wantLen || !bytes.Equal(got, segment) {
|
|
t.Fatalf("read[%d]=%q,%v,%v, want %q,%v,%v", k, got, n, err, segment, wantLen, nil)
|
|
}
|
|
})
|
|
}
|
|
}
|
|
|
|
func TestReader(t *testing.T) {
|
|
content := bytes.Repeat([]byte("hello world!"), 10000)
|
|
encoded, _ := Encode(content, WriterOptions{Quality: 5})
|
|
r := NewReader(bytes.NewReader(encoded))
|
|
var decodedOutput bytes.Buffer
|
|
n, err := io.Copy(&decodedOutput, r)
|
|
if err != nil {
|
|
t.Fatalf("Copy(): n=%v, err=%v", n, err)
|
|
}
|
|
if err := r.Close(); err != nil {
|
|
t.Errorf("Close(): %v", err)
|
|
}
|
|
if got := decodedOutput.Bytes(); !bytes.Equal(got, content) {
|
|
t.Errorf(""+
|
|
"Reader output:\n"+
|
|
"%q\n"+
|
|
"want:\n"+
|
|
"<%d bytes>",
|
|
got, len(content))
|
|
}
|
|
}
|
|
|
|
func TestDecode(t *testing.T) {
|
|
content := bytes.Repeat([]byte("hello world!"), 10000)
|
|
encoded, _ := Encode(content, WriterOptions{Quality: 5})
|
|
decoded, err := Decode(encoded)
|
|
if err != nil {
|
|
t.Errorf("Decode: %v", err)
|
|
}
|
|
if !bytes.Equal(decoded, content) {
|
|
t.Errorf(""+
|
|
"Decode content:\n"+
|
|
"%q\n"+
|
|
"want:\n"+
|
|
"<%d bytes>",
|
|
decoded, len(content))
|
|
}
|
|
}
|
|
|
|
func TestDecodeFuzz(t *testing.T) {
|
|
// Test that the decoder terminates with corrupted input.
|
|
content := bytes.Repeat([]byte("hello world!"), 100)
|
|
src := rand.NewSource(0)
|
|
encoded, err := Encode(content, WriterOptions{Quality: 5})
|
|
if err != nil {
|
|
t.Fatalf("Encode(<%d bytes>, _) = _, %s", len(content), err)
|
|
}
|
|
if len(encoded) == 0 {
|
|
t.Fatalf("Encode(<%d bytes>, _) produced empty output", len(content))
|
|
}
|
|
for i := 0; i < 100; i++ {
|
|
enc := append([]byte{}, encoded...)
|
|
for j := 0; j < 5; j++ {
|
|
enc[int(src.Int63())%len(enc)] = byte(src.Int63() % 256)
|
|
}
|
|
Decode(enc)
|
|
}
|
|
}
|
|
|
|
func TestDecodeTrailingData(t *testing.T) {
|
|
content := bytes.Repeat([]byte("hello world!"), 100)
|
|
encoded, _ := Encode(content, WriterOptions{Quality: 5})
|
|
_, err := Decode(append(encoded, 0))
|
|
if err == nil {
|
|
t.Errorf("Expected 'excessive input' error")
|
|
}
|
|
}
|
|
|
|
func TestEncodeDecode(t *testing.T) {
|
|
for _, test := range []struct {
|
|
data []byte
|
|
repeats int
|
|
}{
|
|
{nil, 0},
|
|
{[]byte("A"), 1},
|
|
{[]byte("<html><body><H1>Hello world</H1></body></html>"), 10},
|
|
{[]byte("<html><body><H1>Hello world</H1></body></html>"), 1000},
|
|
} {
|
|
t.Logf("case %q x %d", test.data, test.repeats)
|
|
input := bytes.Repeat(test.data, test.repeats)
|
|
encoded, err := Encode(input, WriterOptions{Quality: 5})
|
|
if err != nil {
|
|
t.Errorf("Encode: %v", err)
|
|
}
|
|
// Inputs are compressible, but may be too small to compress.
|
|
if maxSize := len(input)/2 + 20; len(encoded) >= maxSize {
|
|
t.Errorf(""+
|
|
"Encode returned %d bytes, want <%d\n"+
|
|
"Encoded=%q",
|
|
len(encoded), maxSize, encoded)
|
|
}
|
|
decoded, err := Decode(encoded)
|
|
if err != nil {
|
|
t.Errorf("Decode: %v", err)
|
|
}
|
|
if !bytes.Equal(decoded, input) {
|
|
var want string
|
|
if len(input) > 320 {
|
|
want = fmt.Sprintf("<%d bytes>", len(input))
|
|
} else {
|
|
want = fmt.Sprintf("%q", input)
|
|
}
|
|
t.Errorf(""+
|
|
"Decode content:\n"+
|
|
"%q\n"+
|
|
"want:\n"+
|
|
"%s",
|
|
decoded, want)
|
|
}
|
|
}
|
|
}
|