fix: fix failed unit test

README.md

@@ -4,7 +4,7 @@
 <br/>
 
 ![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
-[![Release](https://img.shields.io/badge/release-2.2.7-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.2.8-green.svg)](https://github.com/duke-git/lancet/releases)
 [![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
 [![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
@@ -21,7 +21,7 @@
 
 ## <a href="https://www.golancet.cn/en/" target="_blank"> Website</a> | [简体中文](./README_zh-CN.md)
 
-## Feature
+## Features
 
 -   👏 Comprehensive, efficient and reusable.
 -   💪 600+ go util functions, support string, slice, datetime, net, crypt...
@@ -1097,6 +1097,18 @@ import "github.com/duke-git/lancet/v2/random"
 -   **<big>RandUniqueIntSlice</big>** : generate a slice of random int of length n that do not repeat.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/random.md#RandUniqueIntSlice)]
     [[play](https://go.dev/play/p/uBkRSOz73Ec)]
+-   **<big>RandSymbolChar</big>** : Generate a random symbol char of specified length.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/random.md#RandSymbolChar)]
+    [[play](https://go.dev/play/p/Im6ZJxAykOm)]
+
+-   **<big>RandFloat</big>** : Generate a random float64 number between [min, max) with specific precision.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/random.md#RandFloat)]
+    [[play](https://go.dev/play/p/zbD_tuobJtr)]
+
+-   **<big>RandFloats</big>** : Generate a slice of random float64 numbers of length n that do not repeat.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/random.md#RandFloats)]
+    [[play](https://go.dev/play/p/I3yndUQ-rhh)]
+
 
 <h3 id="retry"> 17. Retry package is for executing a function repeatedly until it was successful or canceled by the context. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 
@@ -1340,6 +1352,10 @@ import "github.com/duke-git/lancet/v2/slice"
 -   **<big>Partition</big>** : partition all slice elements with the evaluation of the given predicate functions.
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/slice.md#Partition)]
     [[play](https://go.dev/play/p/lkQ3Ri2NQhV)]
+-   **<big>Random</big>** : get a random item of slice, return its index, when slice is empty, return -1. 
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/en/api/packages/slice.md#Random)]
+    [[play](https://go.dev/play/p/UzpGQptWppw)]
+
 
 <h3 id="stream"> 19. Stream package implements a sequence of elements supporting sequential and operations. this package is an experiment to explore if stream in go can work as the way java does. its function is very limited. &nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">index</a></h3>
 

README_zh-CN.md

@@ -4,7 +4,7 @@
 <br/>
 
 ![Go version](https://img.shields.io/badge/go-%3E%3Dv1.18-9cf)
-[![Release](https://img.shields.io/badge/release-2.2.7-green.svg)](https://github.com/duke-git/lancet/releases)
+[![Release](https://img.shields.io/badge/release-2.2.8-green.svg)](https://github.com/duke-git/lancet/releases)
 [![GoDoc](https://godoc.org/github.com/duke-git/lancet/v2?status.svg)](https://pkg.go.dev/github.com/duke-git/lancet/v2)
 [![Go Report Card](https://goreportcard.com/badge/github.com/duke-git/lancet/v2)](https://goreportcard.com/report/github.com/duke-git/lancet/v2)
 [![test](https://github.com/duke-git/lancet/actions/workflows/codecov.yml/badge.svg?branch=main&event=push)](https://github.com/duke-git/lancet/actions/workflows/codecov.yml)
@@ -1098,6 +1098,16 @@ import "github.com/duke-git/lancet/v2/random"
 -   **<big>RandUniqueIntSlice</big>** : 生成一个不重复的长度为 n 的随机 int 切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/random.md#RandUniqueIntSlice)]
     [[play](https://go.dev/play/p/uBkRSOz73Ec)]
+-   **<big>RandSymbolChar</big>** : 生成给定长度的随机符号字符串。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/random.md#RandSymbolChar)]
+    [[play](https://go.dev/play/p/Im6ZJxAykOm)]
+-   **<big>RandFloat</big>** : 生成随机float64数字，可以指定范围和精度。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/random.md#RandFloat)]
+    [[play](https://go.dev/play/p/zbD_tuobJtr)]
+-   **<big>RandFloats</big>** : 生成随机float64数字切片，可以指定长度，范围和精度.
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/random.md#RandFloats)]
+    [[play](https://go.dev/play/p/uBkRSOz73Ec)]
+
 
 <h3 id="retry"> 17. retry 重试执行函数直到函数运行成功或被 context cancel。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 
@@ -1332,7 +1342,6 @@ import "github.com/duke-git/lancet/v2/slice"
 -   **<big>Without</big>** : 创建一个不包括所有给定值的切片。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/slice.md#Without)]
     [[play](https://go.dev/play/p/bwhEXEypThg)]
--   **<big>KeyBy</big>** :将切片每个元素调用函数后转为 map。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/slice.md#KeyBy)]
     [[play](https://go.dev/play/p/uXod2LWD1Kg)]
 -   **<big>Join</big>** : 用指定的分隔符链接切片元素。
@@ -1341,6 +1350,11 @@ import "github.com/duke-git/lancet/v2/slice"
 -   **<big>Partition</big>** : 根据给定的predicate判断函数分组切片元素。
     [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/slice.md#Partition)]
     [[play](https://go.dev/play/p/lkQ3Ri2NQhV)]
+-   **<big>Random</big>** : 随机返回切片中元素以及下标, 当切片长度为0时返回下标-1。
+    [[doc](https://github.com/duke-git/lancet/blob/main/docs/api/packages/slice.md#Random)]
+    [[play](https://go.dev/play/p/UzpGQptWppw)]
+
+
 
 <h3 id="stream"> 19. stream 流，该包仅验证简单的 stream 实现，功能有限。&nbsp; &nbsp; &nbsp; &nbsp;<a href="#index">回到目录</a></h3>
 

docs/api/packages/random.md

@@ -29,8 +29,11 @@ import (
 -   [RandLower](#RandLower)
 -   [RandNumeral](#RandNumeral)
 -   [RandNumeralOrLetter](#RandNumeralOrLetter)
+-   [RandSymbolChar](#RandSymbolChar)
 -   [UUIdV4](#UUIdV4)
 -   [RandUniqueIntSlice](#RandUniqueIntSlice)
+-   [RandFloat](#RandFloat)
+-   [RandFloats](#RandFloats)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -218,6 +221,32 @@ func main() {
 }
 ```
 
+### <span id="RandSymbolChar">RandSymbolChar</span>
+
+<p>生成给定长度的随机符号字符串。</p>
+
+<b>函数签名:</b>
+
+```go
+func RandSymbolChar(length int) string
+```
+
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/Im6ZJxAykOm)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    randStr := random.RandSymbolChar(6)
+    fmt.Println(randStr) // 随机特殊字符字符串，例如: @#(_")
+}
+```
+
 ### <span id="UUIdV4">UUIdV4</span>
 
 <p>生成UUID v4字符串</p>
@@ -272,3 +301,55 @@ func main() {
     fmt.Println(result) //[0 4 7 1 5] (random)
 }
 ```
+
+### <span id="RandFloat">RandFloat</span>
+
+<p>生成随机float64数字，可以指定范围和精度。</p>
+
+<b>函数签名:</b>
+
+```go
+func RandFloat(min, max float64, precision int) float64
+```
+
+<b>实例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/zbD_tuobJtr)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    floatNumber := random.RandFloat(1.0, 5.0, 2)
+    fmt.Println(floatNumber) //2.14 (random number)
+}
+```
+
+### <span id="RandFloats">RandFloats</span>
+
+<p>生成随机float64数字切片，指定长度，范围和精度.</p>
+
+<b>函数签名:</b>
+
+```go
+func RandFloats(n int, min, max float64, precision int) []float64
+```
+
+<b>实例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/I3yndUQ-rhh)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    floatNumbers := random.RandFloats(5, 1.0, 5.0, 2)
+    fmt.Println(floatNumber) //[3.42 3.99 1.3 2.38 4.23] (random)
+}
+```

docs/api/packages/slice.md

@@ -2501,7 +2501,7 @@ func main() {
 func Random[T any](slice []T) (val T, idx int)
 ```
 
-<b>示例:<span style="float:right;display:inline-block;">[运行](TODO)</span></b>
+<b>示例:<span style="float:right;display:inline-block;">[运行](https://go.dev/play/p/UzpGQptWppw)</span></b>
 
 ```go
 import (

docs/en/api/packages/random.md

@@ -29,8 +29,11 @@ import (
 -   [RandLower](#RandLower)
 -   [RandNumeral](#RandNumeral)
 -   [RandNumeralOrLetter](#RandNumeralOrLetter)
+-   [RandSymbolChar](#RandSymbolChar)
 -   [UUIdV4](#UUIdV4)
 -   [RandUniqueIntSlice](#RandUniqueIntSlice)
+-   [RandFloat](#RandFloat)
+-   [RandFloats](#RandFloats)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -218,6 +221,32 @@ func main() {
 }
 ```
 
+### <span id="RandSymbolChar">RandSymbolChar</span>
+
+<p>Generate a random symbol char of specified length.</p>
+
+<b>Signature:</b>
+
+```go
+func RandSymbolChar(length int) string
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/Im6ZJxAykOm)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    randStr := random.RandSymbolChar(6)
+    fmt.Println(randStr) // random string like: @#(_")
+}
+```
+
 ### <span id="UUIdV4">UUIdV4</span>
 
 <p>Generate a random UUID of version 4 according to RFC 4122.</p>
@@ -273,3 +302,55 @@ func main() {
     fmt.Println(result) //[0 4 7 1 5] (random)
 }
 ```
+
+### <span id="RandFloat">RandFloat</span>
+
+<p>Generate a random float64 number between [min, max) with specific precision.</p>
+
+<b>Signature:</b>
+
+```go
+func RandFloat(min, max float64, precision int) float64
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/zbD_tuobJtr)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    floatNumber := random.RandFloat(1.0, 5.0, 2)
+    fmt.Println(floatNumber) //2.14 (random number)
+}
+```
+
+### <span id="RandFloats">RandFloats</span>
+
+<p>Generate a slice of random float64 numbers of length n that do not repeat.</p>
+
+<b>Signature:</b>
+
+```go
+func RandFloats(n int, min, max float64, precision int) []float64
+```
+
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/I3yndUQ-rhh)</span></b>
+
+```go
+package main
+
+import (
+    "fmt"
+    "github.com/duke-git/lancet/v2/random"
+)
+
+func main() {
+    floatNumbers := random.RandFloats(5, 1.0, 5.0, 2)
+    fmt.Println(floatNumbers) //[3.42 3.99 1.3 2.38 4.23] (random)
+}
+```

docs/en/api/packages/slice.md

@@ -2498,7 +2498,7 @@ func main() {
 func Random[T any](slice []T) (val T, idx int)
 ```
 
-<b>Example:<span style="float:right;display:inline-block;">[Run](TODO)</span></b>
+<b>Example:<span style="float:right;display:inline-block;">[Run](https://go.dev/play/p/UzpGQptWppw)</span></b>
 
 ```go
 import (

fileutil/file_test.go

@@ -27,7 +27,7 @@ func TestCreateFile(t *testing.T) {
 
 	assert := internal.NewAssert(t, "TestCreateFile")
 
-	f := "./text.txt"
+	f := "./testdata/text.txt"
 	if CreateFile(f) {
 		file, err := os.Open(f)
 		assert.IsNil(err)

netutil/http.go

@@ -14,6 +14,7 @@ package netutil
 
 import (
 	"bytes"
+	"context"
 	"crypto/tls"
 	"encoding/json"
 	"errors"
@@ -110,22 +111,23 @@ type HttpClientConfig struct {
 	Verbose          bool
 }
 
-// defaultHttpClientConfig defalut client config
+// defaultHttpClientConfig defalut client config.
 var defaultHttpClientConfig = &HttpClientConfig{
 	Compressed:       false,
 	HandshakeTimeout: 20 * time.Second,
 	ResponseTimeout:  40 * time.Second,
 }
 
-// HttpClient is used for sending http request
+// HttpClient is used for sending http request.
 type HttpClient struct {
 	*http.Client
 	TLS     *tls.Config
 	Request *http.Request
 	Config  HttpClientConfig
+	Context context.Context
 }
 
-// NewHttpClient make a HttpClient instance
+// NewHttpClient make a HttpClient instance.
 func NewHttpClient() *HttpClient {
 	client := &HttpClient{
 		Client: &http.Client{
@@ -141,7 +143,7 @@ func NewHttpClient() *HttpClient {
 	return client
 }
 
-// NewHttpClientWithConfig make a HttpClient instance with pass config
+// NewHttpClientWithConfig make a HttpClient instance with pass config.
 func NewHttpClientWithConfig(config *HttpClientConfig) *HttpClient {
 	if config == nil {
 		config = defaultHttpClientConfig
@@ -176,6 +178,11 @@ func (client *HttpClient) SendRequest(request *HttpRequest) (*http.Response, err
 	rawUrl := request.RawURL
 
 	req, err := http.NewRequest(request.Method, rawUrl, bytes.NewBuffer(request.Body))
+
+	if client.Context != nil {
+		req, err = http.NewRequestWithContext(client.Context, request.Method, rawUrl, bytes.NewBuffer(request.Body))
+	}
+
 	if err != nil {
 		return nil, err
 	}

netutil/net.go

@@ -230,7 +230,6 @@ func UploadFile(filepath string, server string) (bool, error) {
 }
 
 // DownloadFile will download the file exist in url to a local file.
-// Play: todo
 func DownloadFile(filepath string, url string) error {
 	resp, err := http.Get(url)
 	if err != nil {

random/random.go

@@ -10,6 +10,8 @@ import (
 	"io"
 	"math/rand"
 	"time"
+
+	"github.com/duke-git/lancet/v2/mathutil"
 )
 
 const (
@@ -17,13 +19,14 @@ const (
 	LowwerLetters = "abcdefghijklmnopqrstuvwxyz"
 	UpperLetters  = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
 	Letters       = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
+	SymbolChars   = "!@#$%^&*()_+-=[]{}|;':\",./<>?"
 )
 
 func init() {
 	rand.Seed(time.Now().UnixNano())
 }
 
-// RandInt generate random int between min and max, maybe min,  not be max.
+// RandInt generate random int between [min, max).
 // Play: https://go.dev/play/p/pXyyAAI5YxD
 func RandInt(min, max int) int {
 	if min == max {
@@ -37,6 +40,22 @@ func RandInt(min, max int) int {
 	return rand.Intn(max-min) + min
 }
 
+// RandFloat generate random float64 number between [min, max) with specific precision.
+// Play: https://go.dev/play/p/zbD_tuobJtr
+func RandFloat(min, max float64, precision int) float64 {
+	if min == max {
+		return min
+	}
+
+	if max < min {
+		min, max = max, min
+	}
+
+	n := rand.Float64()*(max-min) + min
+
+	return mathutil.RoundToFloat(n, precision)
+}
+
 // RandBytes generate random byte slice.
 // Play: https://go.dev/play/p/EkiLESeXf8d
 func RandBytes(length int) []byte {
@@ -52,19 +71,19 @@ func RandBytes(length int) []byte {
 	return b
 }
 
-// RandString generate random string of specified length.
+// RandString generate random alpha string of specified length.
 // Play: https://go.dev/play/p/W2xvRUXA7Mi
 func RandString(length int) string {
 	return random(Letters, length)
 }
 
-// RandUpper generate a random upper case string.
+// RandUpper generate a random upper case string of specified length.
 // Play: https://go.dev/play/p/29QfOh0DVuh
 func RandUpper(length int) string {
 	return random(UpperLetters, length)
 }
 
-// RandLower generate a random lower case string.
+// RandLower generate a random lower case string of specified length.
 // Play: https://go.dev/play/p/XJtZ471cmtI
 func RandLower(length int) string {
 	return random(LowwerLetters, length)
@@ -76,12 +95,19 @@ func RandNumeral(length int) string {
 	return random(Numeral, length)
 }
 
-// RandNumeralOrLetter generate a random numeral or letter string.
+// RandNumeralOrLetter generate a random numeral or alpha string of specified length.
 // Play: https://go.dev/play/p/19CEQvpx2jD
 func RandNumeralOrLetter(length int) string {
 	return random(Numeral+Letters, length)
 }
 
+// RandSymbolChar generate a random symbol char of specified length.
+// symbol chars: !@#$%^&*()_+-=[]{}|;':\",./<>?.
+// Play: https://go.dev/play/p/Im6ZJxAykOm
+func RandSymbolChar(length int) string {
+	return random(SymbolChars, length)
+}
+
 // random generate a random string based on given string range.
 func random(s string, length int) string {
 	b := make([]byte, length)
@@ -136,3 +162,21 @@ func RandUniqueIntSlice(n, min, max int) []int {
 
 	return nums
 }
+
+// RandFloats generate a slice of random float64 numbers of length n that do not repeat.
+// Play: https://go.dev/play/p/I3yndUQ-rhh
+func RandFloats(n int, min, max float64, precision int) []float64 {
+	nums := make([]float64, n)
+	used := make(map[float64]struct{}, n)
+	for i := 0; i < n; {
+		r := RandFloat(min, max, precision)
+		if _, use := used[r]; use {
+			continue
+		}
+		used[r] = struct{}{}
+		nums[i] = r
+		i++
+	}
+
+	return nums
+}

random/random_example_test.go

@@ -3,6 +3,7 @@ package random
 import (
 	"fmt"
 	"regexp"
+	"strconv"
 )
 
 func ExampleRandInt() {
@@ -134,3 +135,53 @@ func ExampleRandUniqueIntSlice() {
 	// Output:
 	// ok
 }
+
+func ExampleRandSymbolChar() {
+	pattern := `^[\W|_]+$`
+	reg := regexp.MustCompile(pattern)
+
+	s := RandSymbolChar(6)
+
+	result1 := reg.MatchString(s)
+	result2 := len(s)
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// true
+	// 6
+}
+
+func ExampleRandFloat() {
+	pattern := `^[\d{1}.\d{2}]+$`
+	reg := regexp.MustCompile(pattern)
+
+	num := RandFloat(1.0, 5.0, 2)
+
+	// check num is a random float in [1.0, 5.0)
+	result1 := num >= 1.0 && num < 5.0
+	result2 := reg.MatchString(strconv.FormatFloat(num, 'f', -1, 64))
+
+	fmt.Println(result1)
+	fmt.Println(result2)
+
+	// Output:
+	// true
+	// true
+}
+
+func ExampleRandFloats() {
+	isInRange := true
+	numbers := RandFloats(5, 1.0, 5.0, 2)
+	for _, n := range numbers {
+		isInRange = (n >= 1.0 && n < 5.0)
+	}
+
+	fmt.Println(isInRange)
+	fmt.Println(len(numbers))
+
+	// Output:
+	// true
+	// 5
+}

random/random_test.go

@@ -154,3 +154,45 @@ func hasDuplicate(arr []int) bool {
 	}
 	return false
 }
+
+func TestRandSymbolChar(t *testing.T) {
+	t.Parallel()
+
+	pattern := `^[\W|_]+$`
+	reg := regexp.MustCompile(pattern)
+
+	symbolChars := RandSymbolChar(10)
+
+	assert := internal.NewAssert(t, "TestRandSymbolChar")
+	assert.Equal(10, len(symbolChars))
+	assert.Equal(true, reg.MatchString(symbolChars))
+}
+
+func TestRandFloat(t *testing.T) {
+	t.Parallel()
+
+	assert := internal.NewAssert(t, "TestRandFloat")
+
+	r1 := RandFloat(1.1, 10.1, 2)
+	assert.GreaterOrEqual(r1, 1.1)
+	assert.Less(r1, 10.1)
+
+	r2 := RandFloat(1.1, 1.1, 2)
+	assert.Equal(1.1, r2)
+
+	r3 := RandFloat(10.1, 1.1, 2)
+	assert.GreaterOrEqual(r1, 1.1)
+	assert.Less(r3, 10.1)
+}
+
+func TestRandFloats(t *testing.T) {
+	t.Parallel()
+	assert := internal.NewAssert(t, "TestRandFloats")
+
+	numbers := RandFloats(5, 1.0, 5.0, 2)
+	for _, n := range numbers {
+		assert.Equal(true, (n >= 1.0 && n < 5.0))
+	}
+
+	assert.Equal(len(numbers), 5)
+}

slice/slice.go

@@ -1232,7 +1232,7 @@ func Partition[T any](slice []T, predicates ...func(item T) bool) [][]T {
 }
 
 // Random get a random item of slice, return idx=-1 when slice is empty
-// Play: todo
+// Play: https://go.dev/play/p/UzpGQptWppw
 func Random[T any](slice []T) (val T, idx int) {
 	if len(slice) == 0 {
 		return val, -1

strutil/string_internal.go

@@ -32,8 +32,10 @@ func splitIntoStrings(s string, upperCase bool) []string {
 
 	for i := 0; i < len(runes)-1; i++ {
 		if isUpper(runes[i][0]) && isLower(runes[i+1][0]) {
-			runes[i+1] = append([]rune{runes[i][len(runes[i])-1]}, runes[i+1]...)
-			runes[i] = runes[i][:len(runes[i])-1]
+			length := len(runes[i]) - 1
+			temp := runes[i][length]
+			runes[i+1] = append([]rune{temp}, runes[i+1]...)
+			runes[i] = runes[i][:length]
 		}
 	}
 

validator/validator.go

@@ -23,7 +23,7 @@ var (
 	numberRegexMatcher     *regexp.Regexp = regexp.MustCompile(`\d`)
 	intStrMatcher          *regexp.Regexp = regexp.MustCompile(`^[\+-]?\d+$`)
 	urlMatcher             *regexp.Regexp = regexp.MustCompile(`^((ftp|http|https?):\/\/)?(\S+(:\S*)?@)?((([1-9]\d?|1\d\d|2[01]\d|22[0-3])(\.(1?\d{1,2}|2[0-4]\d|25[0-5])){2}(?:\.([0-9]\d?|1\d\d|2[0-4]\d|25[0-4]))|(([a-zA-Z0-9]+([-\.][a-zA-Z0-9]+)*)|((www\.)?))?(([a-z\x{00a1}-\x{ffff}0-9]+-?-?)*[a-z\x{00a1}-\x{ffff}0-9]+)(?:\.([a-z\x{00a1}-\x{ffff}]{2,}))?))(:(\d{1,5}))?((\/|\?|#)[^\s]*)?$`)
-	dnsMatcher             *regexp.Regexp = regexp.MustCompile(`^[a-zA-Z]([a-zA-Z0-9\-]+[\.]?)*[a-zA-Z0-9]$`)
+	dnsMatcher             *regexp.Regexp = regexp.MustCompile(`^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)+[a-zA-Z]{2,}$`)
 	emailMatcher           *regexp.Regexp = regexp.MustCompile(`\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*`)
 	chineseMobileMatcher   *regexp.Regexp = regexp.MustCompile(`^1(?:3\d|4[4-9]|5[0-35-9]|6[67]|7[013-8]|8\d|9\d)\d{8}$`)
 	chineseIdMatcher       *regexp.Regexp = regexp.MustCompile(`^(\d{17})([0-9]|X|x)$`)

validator/validator_example_test.go

@@ -200,7 +200,7 @@ func ExampleIsDns() {
 
 	// Output:
 	// true
-	// false
+	// true
 	// false
 }
 

validator/validator_test.go

@@ -271,7 +271,11 @@ func TestIsDns(t *testing.T) {
 	assert := internal.NewAssert(t, "TestIsDns")
 
 	assert.Equal(true, IsDns("abc.com"))
-	assert.Equal(false, IsDns("a.b.com"))
+	assert.Equal(true, IsDns("123.cn"))
+	assert.Equal(true, IsDns("a.b.com"))
+
+	assert.Equal(false, IsDns("a.b.c"))
+	assert.Equal(false, IsDns("a@b.com"))
 	assert.Equal(false, IsDns("http://abc.com"))
 }
 

xerror/xerror_test.go

@@ -14,12 +14,6 @@ func TestTryUnwrap(t *testing.T) {
 
 	assert := internal.NewAssert(t, "TestTryUnwrap")
 	assert.Equal(42, TryUnwrap(strconv.Atoi("42")))
-}
-
-func TestTryUnwrapFail(t *testing.T) {
-	t.Parallel()
-
-	assert := internal.NewAssert(t, "TestTryUnwrapFail")
 
 	_, err := strconv.Atoi("4o2")
 	defer func() {
@@ -76,8 +70,6 @@ func TestXError_Unwrap(t *testing.T) {
 }
 
 func TestXError_StackTrace(t *testing.T) {
-	// t.Parallel()
-
 	assert := internal.NewAssert(t, "TestXError_StackTrace")
 
 	err := New("error")
@@ -86,7 +78,7 @@ func TestXError_StackTrace(t *testing.T) {
 
 	assert.Equal(3, len(stacks))
 	assert.Equal("github.com/duke-git/lancet/v2/xerror.TestXError_StackTrace", stacks[0].Func)
-	assert.Equal(83, stacks[0].Line)
+	assert.Equal(75, stacks[0].Line)
 	assert.Equal(true, strings.Contains(stacks[0].File, "xerror_test.go"))
 }