[#149] sdk/object: Add address field getters and setters

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>

pkg/object/address_test.go

@@ -0,0 +1,29 @@
+package object
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/pkg/container"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAddress_SetContainerID(t *testing.T) {
+	a := NewAddress()
+
+	cid := container.NewID()
+	cid.SetSHA256(randSHA256Checksum(t))
+
+	a.SetContainerID(cid)
+
+	require.Equal(t, cid, a.GetContainerID())
+}
+
+func TestAddress_SetObjectID(t *testing.T) {
+	a := NewAddress()
+
+	oid := randID(t)
+
+	a.SetObjectID(oid)
+
+	require.Equal(t, oid, a.GetObjectID())
+}