[#345] netmap: Implement an iterator over node endpoints

Signed-off-by: Evgenii Stratonikov <e.stratonikov@yadro.com>

netmap/node_info_test.go

@@ -7,6 +7,45 @@ import (
 	"github.com/stretchr/testify/require"
 )
 
+func TestNodeInfo_NetworkEndpoints(t *testing.T) {
+	t.Run("empty", func(t *testing.T) {
+		var n NodeInfo
+		for range n.NetworkEndpoints() {
+			t.Fatalf("handler is called, but it shouldn't")
+		}
+	})
+
+	var n NodeInfo
+	n.SetNetworkEndpoints("1", "2", "3")
+
+	t.Run("break", func(t *testing.T) {
+		var res []string
+		for s := range n.NetworkEndpoints() {
+			if s == "2" {
+				break
+			}
+			res = append(res, s)
+		}
+		require.Equal(t, []string{"1"}, res)
+	})
+	t.Run("continue", func(t *testing.T) {
+		var res []string
+		for s := range n.NetworkEndpoints() {
+			if s == "2" {
+				continue
+			}
+			res = append(res, s)
+		}
+		require.Equal(t, []string{"1", "3"}, res)
+	})
+
+	var res []string
+	for s := range n.NetworkEndpoints() {
+		res = append(res, s)
+	}
+	require.Equal(t, []string{"1", "2", "3"}, res)
+}
+
 func TestNodeInfo_SetAttribute(t *testing.T) {
 	var n NodeInfo