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|
package msgp
import (
"bytes"
"math/rand"
"testing"
)
var extSizes = [...]int{0, 1, 2, 4, 8, 16, int(tint8), int(tuint16), int(tuint32)}
func randomExt() RawExtension {
e := RawExtension{}
e.Type = int8(rand.Int())
e.Data = RandBytes(extSizes[rand.Intn(len(extSizes))])
return e
}
func TestReadWriteExtension(t *testing.T) {
var buf bytes.Buffer
en := NewWriter(&buf)
dc := NewReader(&buf)
t.Run("interface", func(t *testing.T) {
for i := 0; i < 25; i++ {
buf.Reset()
e := randomExt()
en.WriteExtension(&e)
en.Flush()
err := dc.ReadExtension(&e)
if err != nil {
t.Errorf("error with extension (length %d): %s", len(buf.Bytes()), err)
}
}
})
t.Run("raw", func(t *testing.T) {
for i := 0; i < 25; i++ {
buf.Reset()
e := randomExt()
en.WriteExtensionRaw(e.Type, e.Data)
en.Flush()
typ, payload, err := dc.ReadExtensionRaw()
if err != nil {
t.Errorf("error with extension (length %d): %s", len(buf.Bytes()), err)
}
if typ != e.Type || !bytes.Equal(payload, e.Data) {
t.Errorf("extension mismatch: %d %x != %d %x", typ, payload, e.Type, e.Data)
}
}
})
}
func TestReadWriteLargeExtensionRaw(t *testing.T) {
var buf bytes.Buffer
en := NewWriter(&buf)
dc := NewReader(&buf)
largeExt := RawExtension{Type: int8(rand.Int()), Data: RandBytes(int(tuint32))}
err := en.WriteExtensionRaw(largeExt.Type, largeExt.Data)
if err != nil {
t.Errorf("error with large extension write: %s", err)
}
// write a nil as a marker
err = en.WriteNil()
if err != nil {
t.Errorf("error with large extension write: %s", err)
}
en.Flush()
typ, payload, err := dc.ReadExtensionRaw()
if err != nil {
t.Errorf("error with large extension read: %s", err)
}
if typ != largeExt.Type || !bytes.Equal(payload, largeExt.Data) {
t.Errorf("large extension mismatch: %d %x != %d %x", typ, payload, largeExt.Type, largeExt.Data)
}
err = dc.ReadNil()
if err != nil {
t.Errorf("error with large extension read: %s", err)
}
}
func TestExtensionRawStackBuffer(t *testing.T) {
var buf bytes.Buffer
en := NewWriter(&buf)
dc := NewReader(&buf)
const bufSize = 128
e := &RawExtension{Type: int8(rand.Int()), Data: RandBytes(bufSize)}
allocs := testing.AllocsPerRun(100, func() {
buf.Reset()
var staticBuf [bufSize]byte
slc := e.Data[:rand.Intn(bufSize)]
copy(staticBuf[:], slc)
err := en.WriteExtensionRaw(e.Type, staticBuf[:len(slc)])
if err != nil {
t.Errorf("error writing extension: %s", err)
}
en.Flush()
typ, payload, err := dc.ReadExtensionRaw()
if err != nil {
t.Errorf("error reading extension: %s", err)
}
if typ != e.Type || !bytes.Equal(payload, slc) {
t.Errorf("extension mismatch: %d %x != %d %x", typ, payload, e.Type, slc)
}
})
if allocs != 0 {
t.Errorf("using stack allocated buffer with WriteExtensionRaw caused %f allocations", allocs)
}
}
func TestReadWriteExtensionBytes(t *testing.T) {
var bts []byte
for i := 0; i < 24; i++ {
e := randomExt()
bts, _ = AppendExtension(bts[0:0], &e)
_, err := ReadExtensionBytes(bts, &e)
if err != nil {
t.Errorf("error with extension (length %d): %s", len(bts), err)
}
}
}
func TestAppendAndWriteCompatibility(t *testing.T) {
var bts []byte
var buf bytes.Buffer
en := NewWriter(&buf)
for i := 0; i < 24; i++ {
buf.Reset()
e := randomExt()
bts, _ = AppendExtension(bts[0:0], &e)
en.WriteExtension(&e)
en.Flush()
if !bytes.Equal(buf.Bytes(), bts) {
t.Errorf("the outputs are different:\n\t%x\n\t%x", buf.Bytes(), bts)
}
_, err := ReadExtensionBytes(bts, &e)
if err != nil {
t.Errorf("error with extension (length %d): %s", len(bts), err)
}
}
}
func BenchmarkExtensionReadWrite(b *testing.B) {
var buf bytes.Buffer
en := NewWriter(&buf)
dc := NewReader(&buf)
b.Run("interface", func(b *testing.B) {
b.ReportAllocs()
for i := 0; i < b.N; i++ {
buf.Reset()
e := randomExt()
err := en.WriteExtension(&e)
if err != nil {
b.Errorf("error writing extension: %s", err)
}
en.Flush()
err = dc.ReadExtension(&e)
if err != nil {
b.Errorf("error reading extension: %s", err)
}
}
})
b.Run("raw", func(b *testing.B) {
// this should have zero allocations
b.ReportAllocs()
for i := 0; i < b.N; i++ {
buf.Reset()
e := randomExt()
err := en.WriteExtensionRaw(e.Type, e.Data)
if err != nil {
b.Errorf("error writing extension: %s", err)
}
en.Flush()
typ, payload, err := dc.ReadExtensionRaw()
if err != nil {
b.Errorf("error reading extension: %s", err)
}
if typ != e.Type || !bytes.Equal(payload, e.Data) {
b.Errorf("extension mismatch: %d %x != %d %x", typ, payload, e.Type, e.Data)
}
buf.Reset()
}
})
}
|
