Unlock 30% off on Manual Testing Annual Plans this Holiday Season.

Copied to Clipboard!

How to use String method of rand Package

Best Testkube code snippet using rand.String

quick.go

Source:quick.go

...119				return reflect.Value{}, false120			}121			v.Index(i).Set(elem)122		}123	case reflect.String:124		numChars := rand.Intn(complexSize)125		codePoints := make([]rune, numChars)126		for i := 0; i < numChars; i++ {127			codePoints[i] = rune(rand.Intn(0x10ffff))128		}129		v.SetString(string(codePoints))130	case reflect.Struct:131		for i := 0; i < v.NumField(); i++ {132			elem, ok := Value(concrete.Field(i).Type, rand)133			if !ok {134				return reflect.Value{}, false135			}136			v.Field(i).Set(elem)137		}138	default:139		return reflect.Value{}, false140	}141	return v, true142}143// A Config structure contains options for running a test.144type Config struct {145	// MaxCount sets the maximum number of iterations. If zero,146	// MaxCountScale is used.147	MaxCount int148	// MaxCountScale is a non-negative scale factor applied to the default149	// maximum. If zero, the default is unchanged.150	MaxCountScale float64151	// If non-nil, rand is a source of random numbers. Otherwise a default152	// pseudo-random source will be used.153	Rand *rand.Rand154	// If non-nil, the Values function generates a slice of arbitrary155	// reflect.Values that are congruent with the arguments to the function156	// being tested. Otherwise, the top-level Value function is used157	// to generate them.158	Values func([]reflect.Value, *rand.Rand)159}160var defaultConfig Config161// getRand returns the *rand.Rand to use for a given Config.162func (c *Config) getRand() *rand.Rand {163	if c.Rand == nil {164		return rand.New(rand.NewSource(0))165	}166	return c.Rand167}168// getMaxCount returns the maximum number of iterations to run for a given169// Config.170func (c *Config) getMaxCount() (maxCount int) {171	maxCount = c.MaxCount172	if maxCount == 0 {173		if c.MaxCountScale != 0 {174			maxCount = int(c.MaxCountScale * float64(*defaultMaxCount))175		} else {176			maxCount = *defaultMaxCount177		}178	}179	return180}181// A SetupError is the result of an error in the way that check is being182// used, independent of the functions being tested.183type SetupError string184func (s SetupError) Error() string { return string(s) }185// A CheckError is the result of Check finding an error.186type CheckError struct {187	Count int188	In    []interface{}189}190func (s *CheckError) Error() string {191	return fmt.Sprintf("#%d: failed on input %s", s.Count, toString(s.In))192}193// A CheckEqualError is the result CheckEqual finding an error.194type CheckEqualError struct {195	CheckError196	Out1 []interface{}197	Out2 []interface{}198}199func (s *CheckEqualError) Error() string {200	return fmt.Sprintf("#%d: failed on input %s. Output 1: %s. Output 2: %s", s.Count, toString(s.In), toString(s.Out1), toString(s.Out2))201}202// Check looks for an input to f, any function that returns bool,203// such that f returns false.  It calls f repeatedly, with arbitrary204// values for each argument.  If f returns false on a given input,205// Check returns that input as a *CheckError.206// For example:207//208// 	func TestOddMultipleOfThree(t *testing.T) {209// 		f := func(x int) bool {210// 			y := OddMultipleOfThree(x)211// 			return y%2 == 1 && y%3 == 0212// 		}213// 		if err := quick.Check(f, nil); err != nil {214// 			t.Error(err)215// 		}216// 	}217func Check(f interface{}, config *Config) (err error) {218	if config == nil {219		config = &defaultConfig220	}221	fVal, fType, ok := functionAndType(f)222	if !ok {223		err = SetupError("argument is not a function")224		return225	}226	if fType.NumOut() != 1 {227		err = SetupError("function does not return one value")228		return229	}230	if fType.Out(0).Kind() != reflect.Bool {231		err = SetupError("function does not return a bool")232		return233	}234	arguments := make([]reflect.Value, fType.NumIn())235	rand := config.getRand()236	maxCount := config.getMaxCount()237	for i := 0; i < maxCount; i++ {238		err = arbitraryValues(arguments, fType, config, rand)239		if err != nil {240			return241		}242		if !fVal.Call(arguments)[0].Bool() {243			err = &CheckError{i + 1, toInterfaces(arguments)}244			return245		}246	}247	return248}249// CheckEqual looks for an input on which f and g return different results.250// It calls f and g repeatedly with arbitrary values for each argument.251// If f and g return different answers, CheckEqual returns a *CheckEqualError252// describing the input and the outputs.253func CheckEqual(f, g interface{}, config *Config) (err error) {254	if config == nil {255		config = &defaultConfig256	}257	x, xType, ok := functionAndType(f)258	if !ok {259		err = SetupError("f is not a function")260		return261	}262	y, yType, ok := functionAndType(g)263	if !ok {264		err = SetupError("g is not a function")265		return266	}267	if xType != yType {268		err = SetupError("functions have different types")269		return270	}271	arguments := make([]reflect.Value, xType.NumIn())272	rand := config.getRand()273	maxCount := config.getMaxCount()274	for i := 0; i < maxCount; i++ {275		err = arbitraryValues(arguments, xType, config, rand)276		if err != nil {277			return278		}279		xOut := toInterfaces(x.Call(arguments))280		yOut := toInterfaces(y.Call(arguments))281		if !reflect.DeepEqual(xOut, yOut) {282			err = &CheckEqualError{CheckError{i + 1, toInterfaces(arguments)}, xOut, yOut}283			return284		}285	}286	return287}288// arbitraryValues writes Values to args such that args contains Values289// suitable for calling f.290func arbitraryValues(args []reflect.Value, f reflect.Type, config *Config, rand *rand.Rand) (err error) {291	if config.Values != nil {292		config.Values(args, rand)293		return294	}295	for j := 0; j < len(args); j++ {296		var ok bool297		args[j], ok = Value(f.In(j), rand)298		if !ok {299			err = SetupError(fmt.Sprintf("cannot create arbitrary value of type %s for argument %d", f.In(j), j))300			return301		}302	}303	return304}305func functionAndType(f interface{}) (v reflect.Value, t reflect.Type, ok bool) {306	v = reflect.ValueOf(f)307	ok = v.Kind() == reflect.Func308	if !ok {309		return310	}311	t = v.Type()312	return313}314func toInterfaces(values []reflect.Value) []interface{} {315	ret := make([]interface{}, len(values))316	for i, v := range values {317		ret[i] = v.Interface()318	}319	return ret320}321func toString(interfaces []interface{}) string {322	s := make([]string, len(interfaces))323	for i, v := range interfaces {324		s[i] = fmt.Sprintf("%#v", v)325	}326	return strings.Join(s, ", ")327}...

handshake_messages_test.go

Source:handshake_messages_test.go

...86		r[i] = byte(rand.Int31())87	}88	return r89}90func randomString(n int, rand *rand.Rand) string {91	b := randomBytes(n, rand)92	return string(b)93}94func (*clientHelloMsg) Generate(rand *rand.Rand, size int) reflect.Value {95	m := &clientHelloMsg{}96	m.vers = uint16(rand.Intn(65536))97	m.random = randomBytes(32, rand)98	m.sessionId = randomBytes(rand.Intn(32), rand)99	m.cipherSuites = make([]uint16, rand.Intn(63)+1)100	for i := 0; i < len(m.cipherSuites); i++ {101		m.cipherSuites[i] = uint16(rand.Int31())102	}103	m.compressionMethods = randomBytes(rand.Intn(63)+1, rand)104	if rand.Intn(10) > 5 {105		m.nextProtoNeg = true106	}107	if rand.Intn(10) > 5 {108		m.serverName = randomString(rand.Intn(255), rand)109	}110	m.ocspStapling = rand.Intn(10) > 5111	m.supportedPoints = randomBytes(rand.Intn(5)+1, rand)112	m.supportedCurves = make([]CurveID, rand.Intn(5)+1)113	for i := range m.supportedCurves {114		m.supportedCurves[i] = CurveID(rand.Intn(30000))115	}116	if rand.Intn(10) > 5 {117		m.ticketSupported = true118		if rand.Intn(10) > 5 {119			m.sessionTicket = randomBytes(rand.Intn(300), rand)120		}121	}122	if rand.Intn(10) > 5 {123		m.signatureAndHashes = supportedSignatureAlgorithms124	}125	m.alpnProtocols = make([]string, rand.Intn(5))126	for i := range m.alpnProtocols {127		m.alpnProtocols[i] = randomString(rand.Intn(20)+1, rand)128	}129	if rand.Intn(10) > 5 {130		m.scts = true131	}132	return reflect.ValueOf(m)133}134func (*serverHelloMsg) Generate(rand *rand.Rand, size int) reflect.Value {135	m := &serverHelloMsg{}136	m.vers = uint16(rand.Intn(65536))137	m.random = randomBytes(32, rand)138	m.sessionId = randomBytes(rand.Intn(32), rand)139	m.cipherSuite = uint16(rand.Int31())140	m.compressionMethod = uint8(rand.Intn(256))141	if rand.Intn(10) > 5 {142		m.nextProtoNeg = true143		n := rand.Intn(10)144		m.nextProtos = make([]string, n)145		for i := 0; i < n; i++ {146			m.nextProtos[i] = randomString(20, rand)147		}148	}149	if rand.Intn(10) > 5 {150		m.ocspStapling = true151	}152	if rand.Intn(10) > 5 {153		m.ticketSupported = true154	}155	m.alpnProtocol = randomString(rand.Intn(32)+1, rand)156	if rand.Intn(10) > 5 {157		numSCTs := rand.Intn(4)158		m.scts = make([][]byte, numSCTs)159		for i := range m.scts {160			m.scts[i] = randomBytes(rand.Intn(500), rand)161		}162	}163	return reflect.ValueOf(m)164}165func (*certificateMsg) Generate(rand *rand.Rand, size int) reflect.Value {166	m := &certificateMsg{}167	numCerts := rand.Intn(20)168	m.certificates = make([][]byte, numCerts)169	for i := 0; i < numCerts; i++ {170		m.certificates[i] = randomBytes(rand.Intn(10)+1, rand)171	}172	return reflect.ValueOf(m)173}174func (*certificateRequestMsg) Generate(rand *rand.Rand, size int) reflect.Value {175	m := &certificateRequestMsg{}176	m.certificateTypes = randomBytes(rand.Intn(5)+1, rand)177	numCAs := rand.Intn(100)178	m.certificateAuthorities = make([][]byte, numCAs)179	for i := 0; i < numCAs; i++ {180		m.certificateAuthorities[i] = randomBytes(rand.Intn(15)+1, rand)181	}182	return reflect.ValueOf(m)183}184func (*certificateVerifyMsg) Generate(rand *rand.Rand, size int) reflect.Value {185	m := &certificateVerifyMsg{}186	m.signature = randomBytes(rand.Intn(15)+1, rand)187	return reflect.ValueOf(m)188}189func (*certificateStatusMsg) Generate(rand *rand.Rand, size int) reflect.Value {190	m := &certificateStatusMsg{}191	if rand.Intn(10) > 5 {192		m.statusType = statusTypeOCSP193		m.response = randomBytes(rand.Intn(10)+1, rand)194	} else {195		m.statusType = 42196	}197	return reflect.ValueOf(m)198}199func (*clientKeyExchangeMsg) Generate(rand *rand.Rand, size int) reflect.Value {200	m := &clientKeyExchangeMsg{}201	m.ciphertext = randomBytes(rand.Intn(1000)+1, rand)202	return reflect.ValueOf(m)203}204func (*finishedMsg) Generate(rand *rand.Rand, size int) reflect.Value {205	m := &finishedMsg{}206	m.verifyData = randomBytes(12, rand)207	return reflect.ValueOf(m)208}209func (*nextProtoMsg) Generate(rand *rand.Rand, size int) reflect.Value {210	m := &nextProtoMsg{}211	m.proto = randomString(rand.Intn(255), rand)212	return reflect.ValueOf(m)213}214func (*newSessionTicketMsg) Generate(rand *rand.Rand, size int) reflect.Value {215	m := &newSessionTicketMsg{}216	m.ticket = randomBytes(rand.Intn(4), rand)217	return reflect.ValueOf(m)218}219func (*sessionState) Generate(rand *rand.Rand, size int) reflect.Value {220	s := &sessionState{}221	s.vers = uint16(rand.Intn(10000))222	s.cipherSuite = uint16(rand.Intn(10000))223	s.masterSecret = randomBytes(rand.Intn(100), rand)224	numCerts := rand.Intn(20)225	s.certificates = make([][]byte, numCerts)...

String

Using AI Code Generation

1import (2func main() {3    rand.Seed(time.Now().UnixNano())4    fmt.Println(rand.Intn(100))5    fmt.Println(rand.Intn(100))6    fmt.Println(rand.Float64())7    fmt.Println((rand.Float64() * 5) + 5)

String

Using AI Code Generation

1import (2func main() {3	fmt.Println(rand.Int())4	fmt.Println(rand.Intn(100))5	fmt.Println(rand.Float32())6	fmt.Println(rand.Float64())7	fmt.Println(rand.Float64() * 5 + 5)8	fmt.Println(rand.Perm(5))9}10import (11func main() {12	fmt.Println(rand.Int())13	fmt.Println(rand.Intn(100))14	fmt.Println(rand.Float32())15	fmt.Println(rand.Float64())16	fmt.Println(rand.Float64() * 5 + 5)17	fmt.Println(rand.Perm(5))18}19import (20func main() {21	fmt.Println(rand.Int())22	fmt.Println(rand.Intn(100))23	fmt.Println(rand.Float32())24	fmt.Println(rand.Float64())25	fmt.Println(rand.Float64() * 5 + 5)26	fmt.Println(rand.Perm(5))27}28import (29func main() {30	fmt.Println(rand.Int())31	fmt.Println(rand.Intn(100))32	fmt.Println(rand.Float32())33	fmt.Println(rand.Float64())34	fmt.Println(rand.Float64() * 5 + 5)35	fmt.Println(rand.Perm(5))36}37import (38func main() {39	fmt.Println(rand.Int())40	fmt.Println(rand.Intn(100))41	fmt.Println(rand.Float32())42	fmt.Println(rand.Float64())43	fmt.Println(rand.Float64() * 5 + 5)44	fmt.Println(rand.Perm(5))45}46import (47func main() {48	fmt.Println(rand.Int())49	fmt.Println(rand.Intn(100))50	fmt.Println(rand.Float32())51	fmt.Println(rand.Float64())52	fmt.Println(rand.Float64() * 5 + 5)53	fmt.Println(rand.Perm(5))54}55import (

String

Using AI Code Generation

1import (2func main() {3    rand.Seed(time.Now().Unix())4    fmt.Println(rand.Intn(100))5    fmt.Println(rand.Float64())6    fmt.Println((rand.Float64() * 5) + 5)7    fmt.Println(rand.Intn(100) +

String

Using AI Code Generation

1import (2func main() {3	fmt.Println(randString(10))4}5func randString(n int) string {6	b := make([]byte, n)7	for i := range b {8		b[i] = letterBytes[rand.Intn(len(letterBytes))]9	}10	return string(b)11}

String

Using AI Code Generation

1import (2func main() {3	fmt.Println(rand.String(10))4}5import (6func main() {7	fmt.Println(rand.Int())8}9import (10func main() {11	fmt.Println(rand.Intn(100))12}13import (14func main() {15	fmt.Println(rand.Intn(100))16}17import (18func main() {19	fmt.Println(rand.Intn(100))20}21import (22func main() {23	fmt.Println(rand.Intn(100))24}25import (26func main() {27	fmt.Println(rand.Intn(100))28}29import (30func main() {31	fmt.Println(rand.Intn(100))32}33import (34func main() {35	fmt.Println(rand.Intn(100))36}37import (38func main() {39	fmt.Println(rand.Intn(100))40}41import (42func main() {43	fmt.Println(rand.Int

String

Using AI Code Generation

1import (2func main() {3	fmt.Println(rand.String(6))4	fmt.Println(rand.String(10))5}6import (7func main() {8	fmt.Println(rand.String(6))9	fmt.Println(rand.String(10))10}11import (12func main() {13	fmt.Println(rand.String(6))14	fmt.Println(rand.String(10))15}16import (17func main() {18	fmt.Println(rand.String(6))19	fmt.Println(rand.String(10))20}21import (22func main() {23	fmt.Println(rand.String(6))24	fmt.Println(rand.String(10))25}26import (27func main() {28	fmt.Println(rand.String(6))29	fmt.Println(rand.String(10))30}31import (32func main() {33	fmt.Println(rand.String(6))34	fmt.Println(rand.String(10))35}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.