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: util_test.go
    path of file: ./repos/vuls/reporter
    
    the code of the file until where you have to start completion: package reporter

import (
	"os"
	"reflect"
	"testing"
	"time"

	"github.com/future-architect/vuls/models"
	"github.com/k0kubun/pp"
)

func TestMain(m *testing.M) {
	// util.Log = util.Logger{}.NewCustomLogger()
	pp.ColoringEnabled = false
	code := m.Run()
	os.Exit(code)
}

func TestIsCveInfoUpdated(t *testing.T) {
	f := "2006-01-02"
	base, _ := time.Parse(f, "2015-12-15")
	newer, _ := time.Parse(f, "2015-12-16")

	type In struct {
		cveID string
		cur   models.ScanResult
		prev  models.ScanResult
	}
	var tests = []struct {
		in       In
		expected bool
	}{
		// NVD compare non-initialized times
		{
			in: In{
				cveID: "CVE-2017-0001",
				cur: models.ScanResult{
					ScannedCves: models.VulnInfos{
						"CVE-2017-0001": {
							CveID: "CVE-2017-0001",
							CveContents: models.NewCveContents(
								models.CveContent{
									Type:         models.Nvd,
									CveID:        "CVE-2017-0001",
									LastModified: time.Time{},
								},
							),
						},
					},
				},
				prev: models.ScanResult{
					ScannedCves: models.VulnInfos{
						"CVE-2017-0001": {
							CveID: "CVE-2017-0001",
							CveContents: models.NewCveContents(
								models.CveContent{
									Type:         models.Nvd,
									CveID:        "CVE-2017-0001",
									LastModified: time.Time{},
								},
							),
						},
					},
				},
			},
			expected: false,
		},
		// JVN not updated
		{
			in: In{
				cveID: "CVE-2017-0002",
				cur: models.ScanResult{
					ScannedCves: models.VulnInfos{
						"CVE-2017-0002": {
							CveID: "CVE-2017-0002",
							CveContents: models.NewCveContents(
								models.CveContent{
									Type:         models.Jvn,
									CveID:        "CVE-2017-0002",
									LastModified: base,
								},
							),
						},
					},
				},
				prev: models.ScanResult{
					ScannedCves: models.VulnInfos{
						"CVE-2017-0002": {
							CveID: "CVE-2017-0002",
							CveContents: models.NewCveContents(
								models.CveContent{
									Type:         models.Jvn,
									CveID:        "
    
func TestPlusDiff(t *testing.T) {
	atCurrent, _ := time.Parse("2006-01-02", "2014-12-31")
	atPrevious, _ := time.Parse("2006-01-02", "2014-11-31")
	var tests = []struct {
		inCurrent  models.ScanResults
		inPrevious models.ScanResults
		out        models.ScanResult
	}{
		{
			// same
			inCurrent: models.ScanResults{
				{
					ScannedAt:  atCurrent,
					ServerName: "u16",
					ScannedCves: models.VulnInfos{
						"CVE-2012-6702": {
							CveID:            "CVE-2012-6702",
							AffectedPackages: models.PackageFixStatuses{{Name: "libexpat1"}},
						},
						"CVE-2014-9761": {
							CveID:            "CVE-2014-9761",
							AffectedPackages: models.PackageFixStatuses{{Name: "libc-bin"}},
						},
					},
				},
			},
			inPrevious: models.ScanResults{
				{
					ScannedAt:  atPrevious,
					ServerName: "u16",
					ScannedCves: models.VulnInfos{
						"CVE-2012-6702": {
							CveID:            "CVE-2012-6702",
							AffectedPackages: models.PackageFixStatuses{{Name: "libexpat1"}},
						},
						"CVE-2014-9761": {
							CveID:            "CVE-2014-9761",
							AffectedPackages: models.PackageFixStatuses{{Name: "libc-bin"}},
						},
					},
				},
			},
			out: models.ScanResult{
				ScannedAt:   atCurrent,
				ServerName:  "u16",
				ScannedCves: models.VulnInfos{},
			},
		},
		// plus
		{
			inCurrent: models.ScanResults{
				{
					ScannedAt:  atCurrent,
					ServerName: "u16",
					ScannedCves: models.VulnInfos{
						"CVE-2016-6662": {
							CveID:            "CVE-2016-6662",
							AffectedPackages: models.PackageFixStatuses{{Name: "mysql-libs"}},
						},
					},
					Packages: models.Packages{
						"mysql-libs": {
							Name:       "mysql-libs",
							Version:    "5.1.73",
							Release:    "7.el6",
							NewVersion: "5.1.73",
							NewRelease: "8.el6_8",
							Repository: "",
						},
					},
				},
			},
			inPrevious: models.ScanResults{
				{
					ScannedAt:  atPrevious,
					ServerName: "u16",
				},
			},
			out: models.ScanResult{
				ScannedAt:  atCurrent,
				ServerName: "u16",
				ScannedCves: models.VulnInfos{
					"CVE-2016-6662": {
						CveID:            "CVE-2016-6662",
						AffectedPackages: models.PackageFixStatuses{{Name: "mysql-libs"}},
						DiffStatus:       "+",
					},
				},
				Packages: models.Packages{
					"mysql-libs": {
						Name:       "mysql-libs",
						Version:    "5.1.73",
						Release:    "7.el6",
						NewVersion: "5.1.73",
						NewRelease: "8.el6_8",
						Repository: "",
					},
				},
			},
		},
		// minus
		{
			inCurrent: models.ScanResults{
				{
					ScannedAt:  atCurrent,
					ServerName: "u16",
					ScannedCves: models.VulnInfos{
						"CVE-2012-6702": {
							CveID: "CVE-2012-6702",
						},
					},
				},
			},
			inPrevious: models.ScanResults{
				{
					ScannedAt:  atPrevious,
					ServerName: "u16",
					ScannedCves: models.VulnInfos{
						"CVE-2012-6702": {
							CveID: "CVE-2012-6702",
						},
						"CVE-2014-9761": {
							CveID: "CVE-2014-9761",
						},
					},
				},
			},
			out: models.ScanResult{
				ScannedAt:   atCurrent,
				ServerName:  "u16",
				ScannedCves: models.VulnInfos{},
			},
		},
	}

	for i, tt := range tests {
		diff := diff(tt.inCurrent, tt.inPrevious, true, false)
		for _, actual := range diff {
			if !reflect.DeepEqual(actual.ScannedCves, tt.out.ScannedCves) {
				h := pp.Sprint(actual.ScannedCves)
				x := pp.Sprint(tt.out.ScannedCves)
				t.Errorf("[%d] cves actual: \n %s \n expected: \n %s", i, h, x)
			}

			for j := range tt.out.Packages {
				if !reflect.DeepEqual(tt.out.Packages[j], actual.Packages[j]) {
					h := pp.Sprint(tt.out.Packages[j])
					x := pp.Sprint(actual.Packages[j])
					t.Errorf("[%d] packages actual: \n %s \n expected: \n %s", i, x, h)
				}
			}
		}
	}
}