[#230] shard: Add test for getting SplitInfo

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/local_object_storage/shard/get_test.go

@@ -1,8 +1,12 @@
 package shard_test
 
 import (
+	"bytes"
+	"errors"
 	"testing"
 
+	objectSDK "github.com/nspcc-dev/neofs-api-go/pkg/object"
+	"github.com/nspcc-dev/neofs-node/pkg/core/object"
 	"github.com/nspcc-dev/neofs-node/pkg/local_object_storage/shard"
 	"github.com/stretchr/testify/require"
 )
@@ -62,4 +66,58 @@ func testShardGet(t *testing.T, sh *shard.Shard) {
 		require.NoError(t, err)
 		require.Equal(t, obj.Object(), res.Object())
 	})
+
+	t.Run("parent object", func(t *testing.T) {
+		cid := generateCID()
+		splitID := objectSDK.NewSplitID()
+
+		parent := generateRawObjectWithCID(t, cid)
+		addAttribute(parent, "parent", "attribute")
+
+		child := generateRawObjectWithCID(t, cid)
+		child.SetParent(parent.Object().SDK())
+		child.SetParentID(parent.ID())
+		child.SetSplitID(splitID)
+		addPayload(child, 1<<5)
+
+		putPrm.WithObject(child.Object())
+
+		_, err := sh.Put(putPrm)
+		require.NoError(t, err)
+
+		getPrm.WithAddress(child.Object().Address())
+
+		res, err := sh.Get(getPrm)
+		require.NoError(t, err)
+		require.True(t, binaryEqual(child.Object(), res.Object()))
+
+		getPrm.WithAddress(parent.Object().Address())
+
+		_, err = sh.Get(getPrm)
+
+		var expectedErr *objectSDK.SplitInfoError
+		require.True(t, errors.As(err, &expectedErr))
+
+		si, ok := err.(*objectSDK.SplitInfoError)
+		require.True(t, ok)
+		require.Nil(t, si.SplitInfo().Link())
+		require.Equal(t, child.ID(), si.SplitInfo().LastPart())
+		require.Equal(t, splitID, si.SplitInfo().SplitID())
+	})
+}
+
+// binary equal is used when object contains empty lists in the structure and
+// requre.Equal fails on comparing <nil> and []{} lists.
+func binaryEqual(a, b *object.Object) bool {
+	binaryA, err := a.Marshal()
+	if err != nil {
+		return false
+	}
+
+	binaryB, err := b.Marshal()
+	if err != nil {
+		return false
+	}
+
+	return bytes.Equal(binaryA, binaryB)
 }

pkg/local_object_storage/shard/shard.go

@@ -108,7 +108,7 @@ func WithWriteCache(use bool) Option {
 	}
 }
 
-// hasWriteCache returns bool if write cache exists on shars.
+// hasWriteCache returns bool if write cache exists on shards.
 func (s Shard) hasWriteCache() bool {
 	return s.cfg.useWriteCache
 }