From 20d644758be63ae4cc18c31daf686a34706313ac Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Thu, 10 Sep 2020 14:49:17 +0300
Subject: [PATCH] [#140] sdk/object: Define Attribute type

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 pkg/object/attribute.go      | 45 ++++++++++++++++++++++++++++++++++++
 pkg/object/attribute_test.go | 23 ++++++++++++++++++
 2 files changed, 68 insertions(+)
 create mode 100644 pkg/object/attribute.go
 create mode 100644 pkg/object/attribute_test.go

diff --git a/pkg/object/attribute.go b/pkg/object/attribute.go
new file mode 100644
index 00000000..0b43bcce
--- /dev/null
+++ b/pkg/object/attribute.go
@@ -0,0 +1,45 @@
+package object
+
+import (
+	"github.com/nspcc-dev/neofs-api-go/v2/object"
+)
+
+// Attribute represents v2-compatible object attribute.
+type Attribute object.Attribute
+
+// NewAttributeFromV2 wraps v2 Attribute message to Attribute.
+func NewAttributeFromV2(aV2 *object.Attribute) *Attribute {
+	return (*Attribute)(aV2)
+}
+
+// NewAttribute creates and initializes blank Attribute.
+//
+// Works similar as NewAttributeFromV2(new(Attribute)).
+func NewAttribute() *Attribute {
+	return NewAttributeFromV2(new(object.Attribute))
+}
+
+// GetKey returns key to the object attribute.
+func (a *Attribute) GetKey() string {
+	return (*object.Attribute)(a).GetKey()
+}
+
+// SetKey sets key to the object attribute.
+func (a *Attribute) SetKey(v string) {
+	(*object.Attribute)(a).SetKey(v)
+}
+
+// GetValue return value of the object attribute.
+func (a *Attribute) GetValue() string {
+	return (*object.Attribute)(a).GetValue()
+}
+
+// SetValue sets value of the object attribute.
+func (a *Attribute) SetValue(v string) {
+	(*object.Attribute)(a).SetValue(v)
+}
+
+// ToV2 converts Attribute to v2 Attribute message.
+func (a *Attribute) ToV2() *object.Attribute {
+	return (*object.Attribute)(a)
+}
diff --git a/pkg/object/attribute_test.go b/pkg/object/attribute_test.go
new file mode 100644
index 00000000..cc503e49
--- /dev/null
+++ b/pkg/object/attribute_test.go
@@ -0,0 +1,23 @@
+package object
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestAttribute(t *testing.T) {
+	key, val := "some key", "some value"
+
+	a := NewAttribute()
+	a.SetKey(key)
+	a.SetValue(val)
+
+	require.Equal(t, key, a.GetKey())
+	require.Equal(t, val, a.GetValue())
+
+	aV2 := a.ToV2()
+
+	require.Equal(t, key, aV2.GetKey())
+	require.Equal(t, val, aV2.GetValue())
+}