[#1817] network: Allow to use network addresses from the iterator

Signed-off-by: Evgenii Stratonikov <evgeniy@morphbits.ru>

pkg/network/group_test.go

@@ -0,0 +1,69 @@
+package network
+
+import (
+	"sort"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestAddressGroup_FromStringSlice(t *testing.T) {
+	addrs := []string{
+		"/dns4/node1.neofs/tcp/8080",
+		"/dns4/node2.neofs/tcp/1234/tls",
+	}
+	expected := make(AddressGroup, len(addrs))
+	for i := range addrs {
+		expected[i] = Address{buildMultiaddr(addrs[i], t)}
+	}
+
+	var ag AddressGroup
+	t.Run("empty", func(t *testing.T) {
+		require.Error(t, ag.FromStringSlice(nil))
+	})
+
+	require.NoError(t, ag.FromStringSlice(addrs))
+	require.Equal(t, expected, ag)
+
+	t.Run("error is returned, group is unchanged", func(t *testing.T) {
+		require.Error(t, ag.FromStringSlice([]string{"invalid"}))
+		require.Equal(t, expected, ag)
+	})
+}
+
+func TestAddressGroup_FromIterator(t *testing.T) {
+	addrs := testIterator{
+		"/dns4/node1.neofs/tcp/8080",
+		"/dns4/node2.neofs/tcp/1234/tls",
+	}
+	expected := make(AddressGroup, len(addrs))
+	for i := range addrs {
+		expected[i] = Address{buildMultiaddr(addrs[i], t)}
+	}
+	sort.Sort(expected)
+
+	var ag AddressGroup
+	t.Run("empty", func(t *testing.T) {
+		require.Error(t, ag.FromIterator(testIterator{}))
+	})
+
+	require.NoError(t, ag.FromIterator(addrs))
+	require.Equal(t, expected, ag)
+
+	t.Run("error is returned, group is unchanged", func(t *testing.T) {
+		require.Error(t, ag.FromIterator(testIterator{"invalid"}))
+		require.Equal(t, expected, ag)
+	})
+}
+
+type testIterator []string
+
+func (t testIterator) IterateAddresses(f func(string) bool) {
+	for i := range t {
+		f(t[i])
+	}
+}
+
+func (t testIterator) NumberOfAddresses() int {
+	return len(t)
+}