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package dhcpv4
import (
"net"
"testing"
"github.com/stretchr/testify/require"
)
func TestOptRoutersInterfaceMethods(t *testing.T) {
routers := []net.IP{
net.IPv4(192, 168, 0, 10),
net.IPv4(192, 168, 0, 20),
}
o := OptRouter{Routers: routers}
require.Equal(t, OptionRouter, o.Code(), "Code")
require.Equal(t, net.IPv4len*len(routers), o.Length(), "Length")
require.Equal(t, routers, o.Routers, "Routers")
}
func TestParseOptRouter(t *testing.T) {
data := []byte{
byte(OptionRouter),
8, // Length
192, 168, 0, 10, // Router #1
192, 168, 0, 20, // Router #2
}
o, err := ParseOptRouter(data)
require.NoError(t, err)
routers := []net.IP{
net.IPv4(192, 168, 0, 10),
net.IPv4(192, 168, 0, 20),
}
require.Equal(t, &OptRouter{Routers: routers}, o)
// Short byte stream
data = []byte{byte(OptionRouter)}
_, err = ParseOptRouter(data)
require.Error(t, err, "should get error from short byte stream")
// Wrong code
data = []byte{54, 2, 1, 1}
_, err = ParseOptRouter(data)
require.Error(t, err, "should get error from wrong code")
// Bad length
data = []byte{byte(OptionRouter), 6, 1, 1, 1}
_, err = ParseOptRouter(data)
require.Error(t, err, "should get error from bad length")
}
func TestParseOptRouterNoRouters(t *testing.T) {
// RFC2132 requires that at least one Router IP is specified
data := []byte{
byte(OptionRouter),
0, // Length
}
_, err := ParseOptRouter(data)
require.Error(t, err)
}
func TestOptRouterString(t *testing.T) {
o := OptRouter{Routers: []net.IP{net.IPv4(192, 168, 0, 1), net.IPv4(192, 168, 0, 10)}}
require.Equal(t, "Routers -> 192.168.0.1, 192.168.0.10", o.String())
}
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