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package dhcpv4
import (
"net"
"testing"
"github.com/stretchr/testify/require"
)
func TestOptSubnetMask(t *testing.T) {
o := OptSubnetMask(net.IPMask{255, 255, 255, 0})
require.Equal(t, o.Code, OptionSubnetMask, "Code")
require.Equal(t, "Subnet Mask: ffffff00", o.String(), "String")
require.Equal(t, []byte{255, 255, 255, 0}, o.Value.ToBytes(), "ToBytes")
}
func TestGetSubnetMask(t *testing.T) {
o := OptionsFromList(OptSubnetMask(net.IPMask{}))
mask := GetSubnetMask(o)
require.Nil(t, mask, "empty byte stream")
o = OptionsFromList(OptSubnetMask(net.IPMask{255}))
mask = GetSubnetMask(o)
require.Nil(t, mask, "short byte stream")
o = OptionsFromList(OptSubnetMask(net.IPMask{255, 255, 255, 0}))
mask = GetSubnetMask(o)
require.Equal(t, net.IPMask{255, 255, 255, 0}, mask)
}
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