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2.4 KiB

package assets
import (
"bytes"
"compress/gzip"
"crypto/rand"
"github.com/dsnet/compress/bzip2"
"github.com/stretchr/testify/assert"
"github.com/ulikunitz/xz"
mrand "math/rand"
"testing"
)
const testMinSize = 16 * 1024 // 16MiB
const testMaxSize = 64 * 1024 // 64MiB
// randBytes generates a specified number of random bytes.
func randBytes(size int) []byte {
tmp := make([]byte, size)
_, _ = rand.Read(tmp)
return tmp
}
func randInt(min int, max int) int {
return min + int(mrand.Float64()*float64(max-min))
}
func randData() []byte {
raw := randBytes(1024)
size := randInt(testMinSize, testMaxSize)
var buffer bytes.Buffer
for i := 0; i < size; i++ {
buffer.Write(raw)
}
return buffer.Bytes()
}
func gzipCompress(data []byte) []byte {
buf := bytes.Buffer{}
gw := gzip.NewWriter(&buf)
_, _ = gw.Write(data)
_ = gw.Close()
return buf.Bytes()
}
func bzip2Compress(data []byte) []byte {
buf := bytes.Buffer{}
bw, _ := bzip2.NewWriter(&buf, &bzip2.WriterConfig{
Level: bzip2.DefaultCompression,
})
_, _ = bw.Write(data)
_ = bw.Close()
return buf.Bytes()
}
func xzCompress(data []byte) []byte {
buf := bytes.Buffer{}
xw, _ := xz.NewWriter(&buf)
_, _ = xw.Write(data)
_ = xw.Close()
return buf.Bytes()
}
func TestGzipExtract(t *testing.T) {
raw := randData()
gzOk := gzipCompress(raw)
gzErr := append(gzOk, randBytes(randInt(1, 16))...)
ret, err := gzipExtract(gzOk)
assert.Nil(t, err)
assert.Equal(t, raw, ret)
_, err = gzipExtract(gzErr)
assert.NotNil(t, err)
}
func TestBzip2Extract(t *testing.T) {
raw := randData()
bz2Ok := bzip2Compress(raw)
bz2Err := append(bz2Ok, randBytes(randInt(1, 16))...)
ret, err := bzip2Extract(bz2Ok)
assert.Nil(t, err)
assert.Equal(t, raw, ret)
_, err = bzip2Extract(bz2Err)
assert.NotNil(t, err)
}
func TestXzExtract(t *testing.T) {
raw := randData()
xzOk := xzCompress(raw)
xzErr := append(xzOk, randBytes(randInt(1, 16))...)
ret, err := xzExtract(xzOk)
assert.Nil(t, err)
assert.Equal(t, raw, ret)
_, err = xzExtract(xzErr)
assert.NotNil(t, err)
}
func TestExtract(t *testing.T) {
raw := randData()
ret, err := tryExtract(raw)
assert.Nil(t, err)
assert.Equal(t, raw, ret)
ret, err = tryExtract(gzipCompress(raw))
assert.Nil(t, err)
assert.Equal(t, raw, ret)
ret, err = tryExtract(bzip2Compress(raw))
assert.Nil(t, err)
assert.Equal(t, raw, ret)
ret, err = tryExtract(xzCompress(raw))
assert.Nil(t, err)
assert.Equal(t, raw, ret)
}