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package lz4_test
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"reflect"
"testing"
"github.com/pierrec/lz4"
)
func TestWriterLegacy(t *testing.T) {
goldenFiles := []string{
"testdata/e.txt",
"testdata/gettysburg.txt",
"testdata/Mark.Twain-Tom.Sawyer.txt",
"testdata/Mark.Twain-Tom.Sawyer_long.txt",
"testdata/pg1661.txt",
"testdata/pi.txt",
"testdata/random.data",
"testdata/repeat.txt",
}
for _, fname := range goldenFiles {
for _, header := range []lz4.Header{
{}, // Default header.
{CompressionLevel: 10},
} {
label := fmt.Sprintf("%s/%s", fname, header)
t.Run(label, func(t *testing.T) {
fname := fname
header := header
t.Parallel()
raw, err := ioutil.ReadFile(fname)
if err != nil {
t.Fatal(err)
}
r := bytes.NewReader(raw)
// Compress.
var zout bytes.Buffer
zw := lz4.NewWriterLegacy(&zout)
zw.Header = header
_, err = io.Copy(zw, r)
if err != nil {
t.Fatal(err)
}
err = zw.Close()
if err != nil {
t.Fatal(err)
}
// Uncompress.
var out bytes.Buffer
zr := lz4.NewReaderLegacy(&zout)
n, err := io.Copy(&out, zr)
if err != nil {
t.Fatal(err)
}
// The uncompressed data must be the same as the initial input.
if got, want := int(n), len(raw); got != want {
t.Errorf("invalid sizes: got %d; want %d", got, want)
}
if got, want := out.Bytes(), raw; !reflect.DeepEqual(got, want) {
t.Fatal("uncompressed data does not match original")
}
})
}
}
}
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