neoneo-go/pkg/vm/stackitem/serialization_test.go

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package stackitem
import (
"errors"
"testing"
"github.com/nspcc-dev/neo-go/pkg/io"
"github.com/stretchr/testify/require"
)
func TestSerializationMaxErr(t *testing.T) {
base := make([]byte, MaxSize/2+1)
item := Make(base)
// Pointer is unserializable, but we specifically want to catch ErrTooBig.
arr := []Item{item, item.Dup(), NewPointer(0, []byte{})}
aitem := Make(arr)
_, err := Serialize(item)
require.NoError(t, err)
_, err = Serialize(aitem)
require.True(t, errors.Is(err, ErrTooBig), err)
}
func testSerialize(t *testing.T, expectedErr error, item Item) {
data, err := Serialize(item)
if expectedErr != nil {
require.True(t, errors.Is(err, expectedErr), err)
return
}
require.NoError(t, err)
actual, err := Deserialize(data)
require.NoError(t, err)
require.Equal(t, item, actual)
}
func TestSerialize(t *testing.T) {
bigByteArray := NewByteArray(make([]byte, MaxSize/2))
smallByteArray := NewByteArray(make([]byte, MaxSize/4))
zeroByteArray := NewByteArray(make([]byte, 0))
testArray := func(t *testing.T, newItem func([]Item) Item) {
arr := newItem([]Item{bigByteArray})
testSerialize(t, nil, arr)
testSerialize(t, ErrTooBig, newItem([]Item{bigByteArray, bigByteArray}))
testSerialize(t, ErrTooBig, newItem([]Item{arr, arr}))
arr.Value().([]Item)[0] = smallByteArray
testSerialize(t, nil, newItem([]Item{arr, arr}))
arr.Value().([]Item)[0] = arr
testSerialize(t, ErrRecursive, arr)
items := make([]Item, 0, MaxDeserialized-1)
for i := 0; i < MaxDeserialized-1; i++ {
items = append(items, zeroByteArray)
}
testSerialize(t, nil, newItem(items))
items = append(items, zeroByteArray)
data, err := Serialize(newItem(items))
require.NoError(t, err)
_, err = Deserialize(data)
require.True(t, errors.Is(err, ErrTooBig), err)
}
t.Run("array", func(t *testing.T) {
testArray(t, func(items []Item) Item { return NewArray(items) })
})
t.Run("struct", func(t *testing.T) {
testArray(t, func(items []Item) Item { return NewStruct(items) })
})
t.Run("buffer", func(t *testing.T) {
testSerialize(t, nil, NewBuffer(make([]byte, MaxSize/2)))
testSerialize(t, errTooBigSize, NewBuffer(make([]byte, MaxSize)))
})
t.Run("invalid", func(t *testing.T) {
testSerialize(t, ErrUnserializable, NewInterop(42))
testSerialize(t, ErrUnserializable, nil)
t.Run("protected interop", func(t *testing.T) {
w := io.NewBufBinWriter()
EncodeBinaryProtected(NewInterop(42), w.BinWriter)
require.NoError(t, w.Err)
data := w.Bytes()
r := io.NewBinReaderFromBuf(data)
DecodeBinary(r)
require.Error(t, r.Err)
r = io.NewBinReaderFromBuf(data)
item := DecodeBinaryProtected(r)
require.NoError(t, r.Err)
require.IsType(t, (*Interop)(nil), item)
})
t.Run("protected nil", func(t *testing.T) {
w := io.NewBufBinWriter()
EncodeBinaryProtected(nil, w.BinWriter)
require.NoError(t, w.Err)
data := w.Bytes()
r := io.NewBinReaderFromBuf(data)
DecodeBinary(r)
require.Error(t, r.Err)
r = io.NewBinReaderFromBuf(data)
item := DecodeBinaryProtected(r)
require.NoError(t, r.Err)
require.Nil(t, item)
})
})
t.Run("bool", func(t *testing.T) {
testSerialize(t, nil, NewBool(true))
testSerialize(t, nil, NewBool(false))
})
t.Run("null", func(t *testing.T) {
testSerialize(t, nil, Null{})
})
t.Run("integer", func(t *testing.T) {
testSerialize(t, nil, Make(0xF)) // 1-byte
testSerialize(t, nil, Make(0xFAB)) // 2-byte
testSerialize(t, nil, Make(0xFABCD)) // 4-byte
testSerialize(t, nil, Make(0xFABCDEFEDC)) // 8-byte
})
t.Run("map", func(t *testing.T) {
one := Make(1)
m := NewMap()
m.Add(one, m)
testSerialize(t, ErrRecursive, m)
m.Add(one, bigByteArray)
testSerialize(t, nil, m)
m.Add(Make(2), bigByteArray)
testSerialize(t, ErrTooBig, m)
// Cover code path when result becomes too big after key encode.
m = NewMap()
m.Add(Make(0), NewByteArray(make([]byte, MaxSize-MaxKeySize)))
m.Add(NewByteArray(make([]byte, MaxKeySize)), Make(1))
testSerialize(t, ErrTooBig, m)
m = NewMap()
for i := 0; i < MaxDeserialized/2-1; i++ {
m.Add(Make(i), zeroByteArray)
}
testSerialize(t, nil, m)
for i := 0; i <= MaxDeserialized; i++ {
m.Add(Make(i), zeroByteArray)
}
data, err := Serialize(m)
require.NoError(t, err)
_, err = Deserialize(data)
require.True(t, errors.Is(err, ErrTooBig), err)
})
}
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func TestEmptyDeserialization(t *testing.T) {
empty := []byte{}
_, err := Deserialize(empty)
require.Error(t, err)
}
func TestMapDeserializationError(t *testing.T) {
m := NewMap()
m.Add(Make(1), Make(1))
m.Add(Make(2), nil) // Bad value
m.Add(Make(3), Make(3))
w := io.NewBufBinWriter()
EncodeBinaryProtected(m, w.BinWriter)
require.NoError(t, w.Err)
_, err := Deserialize(w.Bytes())
require.True(t, errors.Is(err, ErrInvalidType), err)
}
func TestDeserializeTooManyElements(t *testing.T) {
item := Make(0)
for i := 0; i < MaxDeserialized-1; i++ { // 1 for zero inner element.
item = Make([]Item{item})
}
data, err := Serialize(item)
require.NoError(t, err)
_, err = Deserialize(data)
require.NoError(t, err)
item = Make([]Item{item})
data, err = Serialize(item)
require.NoError(t, err)
_, err = Deserialize(data)
require.True(t, errors.Is(err, ErrTooBig), err)
}
func BenchmarkEncodeBinary(b *testing.B) {
arr := getBigArray(15)
w := io.NewBufBinWriter()
b.ResetTimer()
b.ReportAllocs()
for i := 0; i < b.N; i++ {
w.Reset()
EncodeBinary(arr, w.BinWriter)
if w.Err != nil {
b.FailNow()
}
}
}
func BenchmarkSerializeSimple(b *testing.B) {
s := NewStruct(nil)
s.Append(Make(100500))
s.Append(Make("1aada0032aba1ef6d1f0")) // Mimicking uint160.
for i := 0; i < b.N; i++ {
_, err := Serialize(s)
if err != nil {
b.FailNow()
}
}
}