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package dhcpv4
import (
"net"
"testing"
"github.com/stretchr/testify/require"
)
func TestOptNTPServersInterfaceMethods(t *testing.T) {
ntpServers := []net.IP{
net.IPv4(192, 168, 0, 10),
net.IPv4(192, 168, 0, 20),
}
o := OptNTPServers{NTPServers: ntpServers}
require.Equal(t, OptionNTPServers, o.Code(), "Code")
require.Equal(t, net.IPv4len*len(ntpServers), o.Length(), "Length")
require.Equal(t, ntpServers, o.NTPServers, "NTPServers")
}
func TestParseOptNTPServers(t *testing.T) {
data := []byte{
byte(OptionNTPServers),
8, // Length
192, 168, 0, 10, // NTP server #1
192, 168, 0, 20, // NTP server #2
}
o, err := ParseOptNTPServers(data[2:])
require.NoError(t, err)
ntpServers := []net.IP{
net.IP{192, 168, 0, 10},
net.IP{192, 168, 0, 20},
}
require.Equal(t, &OptNTPServers{NTPServers: ntpServers}, o)
// Bad length
data = []byte{1, 1, 1}
_, err = ParseOptNTPServers(data)
require.Error(t, err, "should get error from bad length")
}
func TestParseOptNTPserversNoNTPServers(t *testing.T) {
// RFC2132 requires that at least one NTP server IP is specified
_, err := ParseOptNTPServers([]byte{})
require.Error(t, err)
}
func TestOptNTPServersString(t *testing.T) {
o := OptNTPServers{NTPServers: []net.IP{net.IPv4(192, 168, 0, 1), net.IPv4(192, 168, 0, 10)}}
require.Equal(t, "NTP Servers -> 192.168.0.1, 192.168.0.10", o.String())
}
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