[#189] sdk/netmap: Refactor Operation enum

Replace alias to v2 type Operation with v2-compatible implementation.

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

pkg/netmap/operation_test.go

@@ -0,0 +1,55 @@
+package netmap
+
+import (
+	"testing"
+
+	"github.com/nspcc-dev/neofs-api-go/v2/netmap"
+	"github.com/stretchr/testify/require"
+)
+
+func TestOperationFromV2(t *testing.T) {
+	for _, item := range []struct {
+		op   Operation
+		opV2 netmap.Operation
+	}{
+		{
+			op:   0,
+			opV2: netmap.UnspecifiedOperation,
+		},
+		{
+			op:   OpEQ,
+			opV2: netmap.EQ,
+		},
+		{
+			op:   OpNE,
+			opV2: netmap.NE,
+		},
+		{
+			op:   OpOR,
+			opV2: netmap.OR,
+		},
+		{
+			op:   OpAND,
+			opV2: netmap.AND,
+		},
+		{
+			op:   OpLE,
+			opV2: netmap.LE,
+		},
+		{
+			op:   OpLT,
+			opV2: netmap.LT,
+		},
+		{
+			op:   OpGT,
+			opV2: netmap.GT,
+		},
+		{
+			op:   OpGE,
+			opV2: netmap.GE,
+		},
+	} {
+		require.Equal(t, item.op, OperationFromV2(item.opV2))
+		require.Equal(t, item.opV2, item.op.ToV2())
+	}
+}