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)
@@ -1097,6 +1097,12 @@ 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)]
+-   **<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)]
+-   **<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)]
 
 <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 +1346,8 @@ 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)]
 
 <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 +1098,14 @@ 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/uBkRSOz73Ec)]
+-   **<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/uBkRSOz73Ec)]
+-   **<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)]
 
 <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>
 
@@ -1341,6 +1349,9 @@ 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)]
+
 
 <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>
 
@@ -298,3 +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:</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:</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/en/api/packages/random.md

@@ -32,6 +32,8 @@ import (
 -   [RandSymbolChar](#RandSymbolChar)
 -   [UUIdV4](#UUIdV4)
 -   [RandUniqueIntSlice](#RandUniqueIntSlice)
+-   [RandFloat](#RandFloat)
+-   [RandFloats](#RandFloats)
 
 <div STYLE="page-break-after: always;"></div>
 
@@ -300,3 +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:</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:</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)
+}
+```

random/random.go

@@ -163,8 +163,8 @@ func RandUniqueIntSlice(n, min, max int) []int {
 	return nums
 }
 
-// RandFloats generate a slice of random float64 of length n that do not repeat.
+// RandFloats generate a slice of random float64 numbers of length n that do not repeat.
-// Play: https://go.dev/play/p/uBkRSOz73Ec
+// Play: todo
 func RandFloats(n int, min, max float64, precision int) []float64 {
 	nums := make([]float64, n)
 	used := make(map[float64]struct{}, n)

random/random_example_test.go

@@ -3,6 +3,7 @@ package random
 import (
 	"fmt"
 	"regexp"
+	"strconv"
 )
 
 func ExampleRandInt() {
@@ -151,3 +152,36 @@ func ExampleRandSymbolChar() {
 	// 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

@@ -174,8 +174,7 @@ func TestRandFloat(t *testing.T) {
 	assert := internal.NewAssert(t, "TestRandFloat")
 
 	r1 := RandFloat(1.1, 10.1, 2)
-	t.Log(r1)
+	assert.GreaterOrEqual(r1, 1.1)
-	assert.GreaterOrEqual(r1, 5.0)
 	assert.Less(r1, 10.1)
 
 	r2 := RandFloat(1.1, 1.1, 2)
@@ -190,8 +189,10 @@ func TestRandFloats(t *testing.T) {
 	t.Parallel()
 	assert := internal.NewAssert(t, "TestRandFloats")
 
-	result := RandFloats(5, 1.0, 5.0, 2)
+	numbers := RandFloats(5, 1.0, 5.0, 2)
-	t.Log("TestRandFloats result: ", result)
+	for _, n := range numbers {
+		assert.Equal(true, (n >= 1.0 && n < 5.0))
+	}
 
-	assert.Equal(len(result), 5)
+	assert.Equal(len(numbers), 5)
 }

validator/validator_example_test.go

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