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) }) } 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() } } }