Update structure with grpc subdir

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

v2/container/grpc/marshal_test.go

@@ -0,0 +1,77 @@
+package container
+
+import (
+	"testing"
+
+	netmap "github.com/nspcc-dev/neofs-api-go/v2/netmap/grpc"
+	refs "github.com/nspcc-dev/neofs-api-go/v2/refs/grpc"
+	"github.com/stretchr/testify/require"
+)
+
+var (
+	cnr = &Container{
+		OwnerId:  &refs.OwnerID{Value: []byte("Owner")},
+		Nonce:    []byte("Salt"),
+		BasicAcl: 505,
+		Attributes: []*Container_Attribute{
+			{
+				Key:   "Hello",
+				Value: "World",
+			},
+			{
+				Key:   "Privet",
+				Value: "Mir",
+			},
+		},
+		PlacementPolicy: &netmap.PlacementPolicy{
+			ReplFactor: 4,
+			FilterGroups: []*netmap.PlacementPolicy_FilterGroup{
+				{
+					Selectors: []*netmap.PlacementPolicy_FilterGroup_Selector{
+						{
+							Count: 1,
+							Key:   "Node",
+						},
+					},
+					Filters: []*netmap.PlacementPolicy_FilterGroup_Filter{
+						{
+							Key: "City",
+						},
+						{
+							Key: "Datacenter",
+						},
+					},
+					Exclude: []uint32{4, 5, 6},
+				},
+			},
+		},
+	}
+)
+
+func TestContainer_StableMarshal(t *testing.T) {
+	newCnr := new(Container)
+
+	wire, err := cnr.StableMarshal(nil)
+	require.NoError(t, err)
+
+	err = newCnr.Unmarshal(wire)
+	require.NoError(t, err)
+
+	require.Equal(t, cnr, newCnr)
+}
+
+func TestPutRequest_Body_StableMarshal(t *testing.T) {
+	expectedBody := new(PutRequest_Body)
+	expectedBody.Container = cnr
+	expectedBody.PublicKey = []byte{1, 2, 3, 4}
+	expectedBody.Signature = []byte{5, 6, 7, 8}
+
+	wire, err := expectedBody.StableMarshal(nil)
+	require.NoError(t, err)
+
+	gotBody := new(PutRequest_Body)
+	err = gotBody.Unmarshal(wire)
+	require.NoError(t, err)
+
+	require.Equal(t, expectedBody, gotBody)
+}