From 8abf78009a5ac6494195e35389793bae404fad09 Mon Sep 17 00:00:00 2001
From: Leonard Lyubich <leonard@nspcc.ru>
Date: Thu, 27 May 2021 14:43:21 +0300
Subject: [PATCH] [#288] pkg/eacl: Convert nil eACL table to nil API v2 message

Make `Table.ToV2` method to return `nil` when called on `nil`. Write
corresponding unit test.

Signed-off-by: Leonard Lyubich <leonard@nspcc.ru>
---
 pkg/acl/eacl/table.go      | 6 ++++++
 pkg/acl/eacl/table_test.go | 8 ++++++++
 2 files changed, 14 insertions(+)

diff --git a/pkg/acl/eacl/table.go b/pkg/acl/eacl/table.go
index 99b6aad..c348696 100644
--- a/pkg/acl/eacl/table.go
+++ b/pkg/acl/eacl/table.go
@@ -75,7 +75,13 @@ func (t *Table) SetSignature(sig *pkg.Signature) {
 }
 
 // ToV2 converts Table to v2 acl.EACLTable message.
+//
+// Nil Table converts to nil.
 func (t *Table) ToV2() *v2acl.Table {
+	if t == nil {
+		return nil
+	}
+
 	v2 := new(v2acl.Table)
 
 	if t.cid != nil {
diff --git a/pkg/acl/eacl/table_test.go b/pkg/acl/eacl/table_test.go
index ec28efe..c9fe8d5 100644
--- a/pkg/acl/eacl/table_test.go
+++ b/pkg/acl/eacl/table_test.go
@@ -112,3 +112,11 @@ func TestTable_Signature(t *testing.T) {
 
 	require.Equal(t, sig, table.Signature())
 }
+
+func TestTable_ToV2(t *testing.T) {
+	t.Run("nil", func(t *testing.T) {
+		var x *eacl.Table
+
+		require.Nil(t, x.ToV2())
+	})
+}