1 files changed, 35 insertions, 0 deletions
diff --git a/dhcpv6/option_dnsrecursivenameserver_test.go b/dhcpv6/option_dnsrecursivenameserver_test.go
new file mode 100644
index 0000000..85bb982
--- /dev/null
+++ b/dhcpv6/option_dnsrecursivenameserver_test.go
@@ -0,0 +1,35 @@
+package dhcpv6
+
+import (
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+)
+
+func TestParseOptDNSRecursiveNameServer(t *testing.T) {
+	data := []byte{
+		0x2a, 0x03, 0x28, 0x80, 0xff, 0xfe, 0x00, 0x0c, 0xfa, 0xce, 0xb0, 0x0c, 0x00, 0x00, 0x00, 0x35,
+	}
+	expected := []net.IP{
+		net.IP(data),
+	}
+	opt, err := ParseOptDNSRecursiveNameServer(data)
+	require.NoError(t, err)
+	require.Equal(t, opt.NameServers, expected)
+	require.Equal(t, opt.Length(), 16)
+}
+
+func TestOptDNSRecursiveNameServerToBytes(t *testing.T) {
+	ns1 := net.ParseIP("2a03:2880:fffe:c:face:b00c:0:35")
+	ns2 := net.ParseIP("2001:4860:4860::8888")
+	nameservers := []net.IP{ns1, ns2}
+	expected := []byte{
+		0, 23, // DNS_RECURSIVE_NAME_SERVER
+		0, 32, // length
+	}
+	expected = append(expected, []byte(ns1)...)
+	expected = append(expected, []byte(ns2)...)
+	opt := OptDNSRecursiveNameServer{NameServers: nameservers}
+	require.Equal(t, opt.ToBytes(), expected)
+}