mirror of
https://github.com/octoleo/restic.git
synced 2024-12-24 20:00:21 +00:00
371 lines
8.0 KiB
Go
371 lines
8.0 KiB
Go
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package guid
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import (
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"encoding/json"
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"errors"
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"fmt"
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"io/ioutil"
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"testing"
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)
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func Test_DefaultIsVersion4(t *testing.T) {
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subject := NewGUID()
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if ver := subject.Version(); ver != 4 {
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t.Logf("Default GUID should be produced using algorithm: version 4. Actual: version %d\n%s", ver, subject.String())
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t.Fail()
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}
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}
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func Test_NewGUIDs_NotEmpty(t *testing.T) {
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for strat := range knownStrategies {
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t.Run(string(strat), func(subT *testing.T) {
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subject, err := NewGUIDs(strat)
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if err != nil {
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subT.Error(err)
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}
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if subject == Empty() {
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subT.Logf("unexpected empty encountered")
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subT.Fail()
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}
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})
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}
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}
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func Test_NewGUIDs_Unsupported(t *testing.T) {
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fauxStrategy := CreationStrategy("invalidStrategy")
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subject, err := NewGUIDs(fauxStrategy)
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if subject != Empty() {
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t.Fail()
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}
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if err.Error() != "Unsupported CreationStrategy" {
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t.Fail()
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}
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}
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func Test_Format_Empty(t *testing.T) {
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subject := Empty()
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testCases := []struct {
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shortFormat Format
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expected string
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}{
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{FormatP, "(00000000-0000-0000-0000-000000000000)"},
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{FormatX, "{0x00000000,0x0000,0x0000,{0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00}}"},
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{FormatN, "00000000000000000000000000000000"},
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{FormatD, "00000000-0000-0000-0000-000000000000"},
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{FormatB, "{00000000-0000-0000-0000-000000000000}"},
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}
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for _, scenario := range testCases {
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t.Run("", func(subT *testing.T) {
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result := subject.Stringf(scenario.shortFormat)
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if result != scenario.expected {
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subT.Logf("\nwant:\t%s\ngot: \t%s", scenario.expected, result)
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subT.Fail()
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}
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})
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}
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}
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func Test_Parse_Roundtrip(t *testing.T) {
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subject := NewGUID()
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for format := range knownFormats {
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t.Run(string(format), func(subT *testing.T) {
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serialized := subject.Stringf(format)
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parsed, parseErr := Parse(serialized)
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if nil != parseErr {
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subT.Error(parseErr)
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}
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if parsed != subject {
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subT.Logf("\nwant:\t%s\ngot: \t%s", subject.String(), parsed.String())
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subT.Fail()
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}
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})
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}
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}
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func Test_Parse_Failures(t *testing.T) {
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testCases := []string{
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"",
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"abc",
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"00000000-0000-0000-0000-000000", // Missing digits
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}
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for _, tc := range testCases {
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t.Run("", func(t *testing.T) {
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result, err := Parse(tc)
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if expected := fmt.Sprintf(`"%s" is not in a recognized format`, tc); nil == err || expected != err.Error() {
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t.Logf("\nwant:\t%s\ngot: \t%v", expected, err)
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t.Fail()
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}
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if result != Empty() {
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t.Logf("\nwant:\t%s\ngot: \t%s", Empty().String(), result.String())
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t.Fail()
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}
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})
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}
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}
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func Test_version4_ReservedBits(t *testing.T) {
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for i := 0; i < 500; i++ {
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result, _ := version4()
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if result.clockSeqHighAndReserved&0xc0 != 0x80 {
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t.Fail()
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}
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}
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}
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func TestGUID_Stringf(t *testing.T) {
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rand := NewGUID()
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formats := []Format{Format("")}
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for format := range knownFormats {
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formats = append(formats, format)
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}
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for _, format := range formats {
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t.Run(string(format), func(t *testing.T) {
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result := rand.Stringf(format)
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if result == "" {
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t.Logf("could not create string for format, '%s'", string(format))
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t.FailNow()
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}
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rehydrated, err := Parse(result)
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if err != nil {
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t.Error(err)
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}
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if rehydrated != rand {
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t.Logf("'%s' isn't well formed", result)
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t.Fail()
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}
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})
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}
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}
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func Test_version4_NoOctetisReliablyZero(t *testing.T) {
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results := make(map[string]uint)
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const iterations uint = 500
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const suspicionThreshold uint = iterations / 10
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results["time_low"] = 0
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results["time_mid"] = 0
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results["time_hi_and_version"] = 0
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results["clock_seq_hi_and_reserved"] = 0
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results["clock_seq_low"] = 0
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results["node"] = 0
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for i := uint(0); i < iterations; i++ {
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current, _ := version4()
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if 0 == current.timeLow {
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results["time_low"]++
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}
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if 0 == current.timeMid {
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results["time_mid"]++
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}
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if 0 == current.timeHighAndVersion {
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results["time_hi_and_version"]++
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}
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if 0 == current.clockSeqHighAndReserved {
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results["clock_seq_hi_and_reserved"]++
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}
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if 0 == current.clockSeqLow {
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results["clock_seq_low"]++
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}
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}
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anySuspicious := false
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for key, val := range results {
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if val > suspicionThreshold {
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anySuspicious = true
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t.Logf("%s reported value 0 enough times (%d of %d) to be suspicious.", key, val, iterations)
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}
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}
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if anySuspicious {
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t.Fail()
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}
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}
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func Test_SubsequentCallsDiffer(t *testing.T) {
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for strat := range knownStrategies {
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t.Run(string(strat), func(subT *testing.T) {
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seen := make(map[GUID]struct{})
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for i := 0; i < 500; i++ {
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result, err := NewGUIDs(strat)
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if err != nil {
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subT.Error(err)
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}
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if _, present := seen[result]; present == true {
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subT.Logf("The value %s was generated multiple times.", result.String())
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subT.Fail()
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}
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seen[result] = struct{}{}
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}
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})
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}
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}
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func Test_JSONRoundTrip(t *testing.T) {
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testCases := []GUID{
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Empty(),
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NewGUID(),
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}
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for _, tc := range testCases {
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t.Run("", func(t *testing.T) {
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marshaled, err := json.Marshal(tc)
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if err != nil {
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t.Error(err)
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}
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var unmarshaled GUID
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err = json.Unmarshal(marshaled, &unmarshaled)
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if err != nil {
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t.Error(err)
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}
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if tc != unmarshaled {
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t.Logf("\ngot: \t%s\nwant:\t%s", unmarshaled.String(), tc.String())
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t.Fail()
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}
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})
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}
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}
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func TestGUID_UnmarshalJSON_Failure(t *testing.T) {
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invalidJSON := errors.New("unexpected end of JSON input")
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notJSONString := errors.New("JSON GUID must be surrounded by quotes")
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testCases := []struct {
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string
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error
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}{
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{``, invalidJSON},
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{`"`, invalidJSON},
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{`a`, errors.New("invalid character 'a' looking for beginning of value")},
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{`3`, notJSONString},
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{`""`, errors.New(`"" is not in a recognized format`)},
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{`"ab"`, errors.New(`"ab" is not in a recognized format`)},
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}
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for _, tc := range testCases {
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t.Run("", func(t *testing.T) {
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var unmarshaled GUID
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err := json.Unmarshal([]byte(tc.string), &unmarshaled).Error()
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if expected := tc.error.Error(); err != expected {
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t.Logf("\ngot: \t%s\nwant:\t%s", err, expected)
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t.Fail()
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}
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if expected := Empty(); unmarshaled != expected {
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t.Logf("\ngot: \t%s\nwant:\t%s", unmarshaled.String(), expected.String())
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t.Fail()
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}
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})
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}
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}
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func Test_getMACAddress(t *testing.T) {
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subject, err := getMACAddress()
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t.Logf("MAC returned: %02x:%02x:%02x:%02x:%02x:%02x", subject[0], subject[1], subject[2], subject[3], subject[4], subject[5])
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if nil != err {
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t.Error(err)
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}
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nonZeroSeen := false
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for _, octet := range subject {
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if 0 != octet {
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nonZeroSeen = true
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break
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}
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}
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if !nonZeroSeen {
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t.Fail()
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}
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}
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func Test_setVersion_bounds(t *testing.T) {
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testCases := []uint16{0, 6}
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for _, tc := range testCases {
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t.Run(fmt.Sprint(tc), func(t *testing.T) {
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var fodder GUID
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err := fodder.setVersion(tc)
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if nil == err {
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t.Log("error expected but unfound when version set to 0")
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t.Fail()
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}
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})
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}
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}
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func Benchmark_NewGUIDs(b *testing.B) {
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for strat := range knownStrategies {
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b.Run(string(strat), func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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NewGUIDs(strat)
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}
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})
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}
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}
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func Benchmark_String(b *testing.B) {
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rand, _ := NewGUIDs(CreationStrategyVersion4)
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b.ResetTimer()
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for i := 0; i < b.N; i++ {
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fmt.Fprint(ioutil.Discard, rand.String()) // This slows down the call, but lets `go vet` pass.
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}
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}
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func Benchmark_Stringf(b *testing.B) {
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rand := NewGUID()
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b.ResetTimer()
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for format := range knownFormats {
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b.Run(string(format), func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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rand.Stringf(format)
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}
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})
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}
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}
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func Benchmark_Parse(b *testing.B) {
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rand := NewGUID()
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b.ResetTimer()
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for format := range knownFormats {
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printed := rand.Stringf(format)
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b.Run(string(format), func(b *testing.B) {
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for i := 0; i < b.N; i++ {
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Parse(printed)
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}
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})
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}
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}
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func ExampleGUID_Stringf() {
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fmt.Printf(Empty().Stringf(FormatB))
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// Output: {00000000-0000-0000-0000-000000000000}
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}
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func ExampleGUID_String() {
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fmt.Printf(Empty().String())
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// Output: 00000000-0000-0000-0000-000000000000
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}
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func ExampleEmpty() {
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var example GUID
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if example == Empty() {
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fmt.Print("Example is Empty")
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} else {
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fmt.Print("Example is not Empty")
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}
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// Output: Example is Empty
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}
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