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package gozstd
import (
"bytes"
"fmt"
"testing"
"time"
)
func TestStreamCompressDecompress(t *testing.T) {
testStreamCompressDecompress(t, "")
testStreamCompressDecompress(t, "a")
testStreamCompressDecompress(t, "foo bar")
for blockSize := range []int{11, 111, 1111, 11111, 111111, 211111} {
data := newTestString(blockSize, 3)
testStreamCompressDecompress(t, data)
}
}
func testStreamCompressDecompress(t *testing.T, data string) {
t.Helper()
// Serial test.
if err := testStreamCompressDecompressSerial(data); err != nil {
t.Fatalf("error in serial test: %s", err)
}
// Concurrent test.
ch := make(chan error, 3)
for i := 0; i < cap(ch); i++ {
go func() {
ch <- testStreamCompressDecompressSerial(data)
}()
}
for i := 0; i < cap(ch); i++ {
select {
case err := <-ch:
if err != nil {
t.Fatalf("error in concurrent test: %s", err)
}
case <-time.After(time.Second):
t.Fatalf("timeout in concurrent test")
}
}
}
func testStreamCompressDecompressSerial(data string) error {
var bbCompress bytes.Buffer
if err := StreamCompress(&bbCompress, bytes.NewBufferString(data)); err != nil {
return fmt.Errorf("cannot compress stream of size %d: %s", len(data), err)
}
var bbDecompress bytes.Buffer
if err := StreamDecompress(&bbDecompress, &bbCompress); err != nil {
return fmt.Errorf("cannot decompress stream of size %d: %s", len(data), err)
}
plainData := bbDecompress.Bytes()
if string(plainData) != data {
return fmt.Errorf("unexpected decompressed data; got\n%q; want\n%q", plainData, data)
}
return nil
}
func TestStreamCompressDecompressLevel(t *testing.T) {
for level := 0; level < 20; level++ {
t.Run(fmt.Sprintf("level_%d", level), func(t *testing.T) {
testStreamCompressDecompressLevel(t, "", level)
testStreamCompressDecompressLevel(t, "a", level)
testStreamCompressDecompressLevel(t, "foo bar", level)
for blockSize := range []int{11, 111, 1111, 11111, 143333} {
data := newTestString(blockSize, 3)
testStreamCompressDecompressLevel(t, data, level)
}
})
}
}
func testStreamCompressDecompressLevel(t *testing.T, data string, level int) {
t.Helper()
// Serial test.
if err := testStreamCompressDecompressLevelSerial(data, level); err != nil {
t.Fatalf("error in serial test: %s", err)
}
// Concurrent test.
ch := make(chan error, 3)
for i := 0; i < cap(ch); i++ {
go func() {
ch <- testStreamCompressDecompressLevelSerial(data, level)
}()
}
for i := 0; i < cap(ch); i++ {
select {
case err := <-ch:
if err != nil {
t.Fatalf("error in concurrent test: %s", err)
}
case <-time.After(5 * time.Second):
t.Fatalf("timeout in concurrent test")
}
}
}
func testStreamCompressDecompressLevelSerial(data string, level int) error {
var bbCompress bytes.Buffer
if err := StreamCompressLevel(&bbCompress, bytes.NewBufferString(data), level); err != nil {
return fmt.Errorf("cannot compress stream of size %d: %s", len(data), err)
}
var bbDecompress bytes.Buffer
if err := StreamDecompress(&bbDecompress, &bbCompress); err != nil {
return fmt.Errorf("cannot decompress stream of size %d: %s", len(data), err)
}
plainData := bbDecompress.Bytes()
if string(plainData) != data {
return fmt.Errorf("unexpected decompressed data; got\n%q; want\n%q", plainData, data)
}
return nil
}
func TestStreamCompressDecompressDict(t *testing.T) {
var samples [][]byte
for i := 0; i < 1000; i++ {
sample := fmt.Sprintf("this is a dict sample line %d", i)
samples = append(samples, []byte(sample))
}
dict := BuildDict(samples, 8*1024)
cd, err := NewCDict(dict)
if err != nil {
t.Fatalf("cannot create CDict: %s", err)
}
defer cd.Release()
dd, err := NewDDict(dict)
if err != nil {
t.Fatalf("cannot create DDict: %s", err)
}
defer dd.Release()
// Create data for the compression.
var bb bytes.Buffer
for bb.Len() < 256*1024 {
fmt.Fprintf(&bb, "dict sample line %d this is", bb.Len())
}
data := bb.Bytes()
// Serial test.
if err := testStreamCompressDecompressDictSerial(cd, dd, data); err != nil {
t.Fatalf("error in serial test: %s", err)
}
// Concurrent test.
ch := make(chan error, 3)
for i := 0; i < cap(ch); i++ {
go func() {
ch <- testStreamCompressDecompressDictSerial(cd, dd, data)
}()
}
for i := 0; i < cap(ch); i++ {
select {
case err := <-ch:
if err != nil {
t.Fatalf("error in concurrent test: %s", err)
}
case <-time.After(time.Second):
t.Fatalf("timeout in concurrent test")
}
}
}
func testStreamCompressDecompressDictSerial(cd *CDict, dd *DDict, data []byte) error {
var bbCompress bytes.Buffer
if err := StreamCompressDict(&bbCompress, bytes.NewReader(data), cd); err != nil {
return fmt.Errorf("cannot compress stream of size %d: %s", len(data), err)
}
var bbDecompress bytes.Buffer
if err := StreamDecompressDict(&bbDecompress, &bbCompress, dd); err != nil {
return fmt.Errorf("cannot decompress stream of size %d: %s", len(data), err)
}
plainData := bbDecompress.Bytes()
if !bytes.Equal(plainData, data) {
return fmt.Errorf("unexpected decompressed data; got\n%q; want\n%q", plainData, data)
}
return nil
}
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