You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: v4_internal_test.go
    path of file: ./repos/AdGuardHome/internal/dhcpsvc
    
    the code of the file until where you have to start completion: package dhcpsvc

import (
	"net/netip"
	"testing"

	"github.com/google/gopacket/layers"
	"github.com/stretchr/testify/assert"
)

func TestIPv4Config_Options(t *testing.T) {
	oneIP, otherIP := netip.MustParseAddr("1.2.3.4"), netip.MustParseAddr("5.6.7.8")
	subnetMask := netip.MustParseAddr("255.255.0.0")

	opt1 := layers.NewDHCPOption(layers.DHCPOptSubnetMask, subnetMask.AsSlice())
	opt6 := layers.NewDHCPOption(layers.DHCPOptDNS, append(oneIP.AsSlice(), otherIP.AsSlice()...))
	opt28 := layers.NewDHCPOption(layers.DHCPOptBroadcastAddr, oneIP.AsSlice())
	opt121 := layers.NewDHCPOption(layers.DHCPOptClasslessStaticRoute, []byte("cba"))

	testCases := []struct {
		name         string
		conf         *IPv4Config
		wantExplicit layers.DHCPOptions
	}{{
		name: "all_default",
		conf: &IPv4Config{
			Options: nil,
		},
		wantExplicit: nil,
	}, {
		name: "configured_ip",
		conf: &IPv4Config{
			Options: layers.DHCPOptions{opt28},
		},
		wantExplicit: layers.DHCPOptions{opt28},
	}, {
		name: "configured_ips",
		conf: &IPv4Config{
			Options: layers.DHCPOptions{opt6},
		},
		wantExplicit: layers.DHCPOptions{opt6},
	}, {
		name: "configured_del",
		conf: &IPv4Config{
			Options: layers.DHCPOptions{
				layers.NewDHCPOption(layers.DHCPOptBroadcastAddr, nil),
			},
		},
		wantExplicit: nil,
	}, {
		name: "
    
func TestIPv4Config_Options(t *testing.T) {
	oneIP, otherIP := netip.MustParseAddr("1.2.3.4"), netip.MustParseAddr("5.6.7.8")
	subnetMask := netip.MustParseAddr("255.255.0.0")

	opt1 := layers.NewDHCPOption(layers.DHCPOptSubnetMask, subnetMask.AsSlice())
	opt6 := layers.NewDHCPOption(layers.DHCPOptDNS, append(oneIP.AsSlice(), otherIP.AsSlice()...))
	opt28 := layers.NewDHCPOption(layers.DHCPOptBroadcastAddr, oneIP.AsSlice())
	opt121 := layers.NewDHCPOption(layers.DHCPOptClasslessStaticRoute, []byte("cba"))

	testCases := []struct {
		name         string
		conf         *IPv4Config
		wantExplicit layers.DHCPOptions
	}{{
		name: "all_default",
		conf: &IPv4Config{
			Options: nil,
		},
		wantExplicit: nil,
	}, {
		name: "configured_ip",
		conf: &IPv4Config{
			Options: layers.DHCPOptions{opt28},
		},
		wantExplicit: layers.DHCPOptions{opt28},
	}, {
		name: "configured_ips",
		conf: &IPv4Config{
			Options: layers.DHCPOptions{opt6},
		},
		wantExplicit: layers.DHCPOptions{opt6},
	}, {
		name: "configured_del",
		conf: &IPv4Config{
			Options: layers.DHCPOptions{
				layers.NewDHCPOption(layers.DHCPOptBroadcastAddr, nil),
			},
		},
		wantExplicit: nil,
	}, {
		name: "rewritten_del",
		conf: &IPv4Config{
			Options: layers.DHCPOptions{
				layers.NewDHCPOption(layers.DHCPOptBroadcastAddr, nil),
				opt28,
			},
		},
		wantExplicit: layers.DHCPOptions{opt28},
	}, {
		name: "configured_and_del",
		conf: &IPv4Config{
			Options: layers.DHCPOptions{
				layers.NewDHCPOption(layers.DHCPOptClasslessStaticRoute, []byte("a")),
				layers.NewDHCPOption(layers.DHCPOptClasslessStaticRoute, nil),
				opt121,
			},
		},
		wantExplicit: layers.DHCPOptions{opt121},
	}, {
		name: "replace_config_value",
		conf: &IPv4Config{
			SubnetMask: netip.MustParseAddr("255.255.255.0"),
			Options:    layers.DHCPOptions{opt1},
		},
		wantExplicit: layers.DHCPOptions{opt1},
	}}

	for _, tc := range testCases {
		t.Run(tc.name, func(t *testing.T) {
			imp, exp := tc.conf.options()
			assert.Equal(t, tc.wantExplicit, exp)

			for c := range exp {
				assert.NotContains(t, imp, c)
			}
		})
	}
}