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package dhcpv4
import (
"net"
"testing"
"github.com/stretchr/testify/require"
)
func TestOptSubnetMaskInterfaceMethods(t *testing.T) {
mask := net.IPMask{255, 255, 255, 0}
o := OptSubnetMask{SubnetMask: mask}
require.Equal(t, OptionSubnetMask, o.Code(), "Code")
expectedBytes := []byte{255, 255, 255, 0}
require.Equal(t, expectedBytes, o.ToBytes(), "ToBytes")
require.Equal(t, "Subnet Mask -> ffffff00", o.String(), "String")
}
func TestParseOptSubnetMask(t *testing.T) {
var (
o *OptSubnetMask
err error
)
o, err = ParseOptSubnetMask([]byte{})
require.Error(t, err, "empty byte stream")
o, err = ParseOptSubnetMask([]byte{255})
require.Error(t, err, "short byte stream")
o, err = ParseOptSubnetMask([]byte{255, 255, 255, 0})
require.NoError(t, err)
require.Equal(t, net.IPMask{255, 255, 255, 0}, o.SubnetMask)
}
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