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: local_test.go
    path of file: ./repos/amass/systems
    
    the code of the file until where you have to start completion: // Copyright Â© by Jeff Foley 2017-2023. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
// SPDX-License-Identifier: Apache-2.0

package systems

import (
	"reflect"
	"testing"
)

func TestCheckAddresses(t *testing.T) {
	tests := []struct {
		name     string
		addr     []string
		expected []string
	}{
		{
			name:     "IP without port",
			addr:     []string{"1.1.1.1"},
			expected: []string{"1.1.1.1:53"},
		},
		{
			name:     "IP with port already set",
			addr:     []string{"1.1.1.1:58"},
			expected: []string{"1.1.1.1:58"},
		},
		{
			name:     "Multiple IPs",
			addr:     []string{"1.1.1.1
    
func TestCheckAddresses(t *testing.T) {
	tests := []struct {
		name     string
		addr     []string
		expected []string
	}{
		{
			name:     "IP without port",
			addr:     []string{"1.1.1.1"},
			expected: []string{"1.1.1.1:53"},
		},
		{
			name:     "IP with port already set",
			addr:     []string{"1.1.1.1:58"},
			expected: []string{"1.1.1.1:58"},
		},
		{
			name:     "Multiple IPs",
			addr:     []string{"1.1.1.1", "8.8.8.8:80", "111.111.111.111"},
			expected: []string{"1.1.1.1:53", "8.8.8.8:80", "111.111.111.111:53"},
		},
		{
			name:     "Invalid IP",
			addr:     []string{"NotAnIP"},
			expected: []string{},
		},
		{
			name:     "Invalid IP with Port",
			addr:     []string{"300.300.300.300:53"},
			expected: []string{},
		},
		{
			name:     "Multiple IPs, valid and invalid",
			addr:     []string{"192.168.61.221", "NotAnIP:80", "111.111.111.111:111"},
			expected: []string{"192.168.61.221:53", "111.111.111.111:111"},
		},
	}

	for _, tt := range tests {
		t.Run(tt.name, func(t *testing.T) {
			ips := checkAddresses(tt.addr)
			if !reflect.DeepEqual(ips, tt.expected) {
				t.Errorf("Unexpected Result, expected %v, got %v", tt.expected, ips)
			}
		})
	}
}