slice test

slice.go

@@ -2,8 +2,8 @@
  * @Author: zhoufei
  * @Date: 2022-05-25 13:54:05
  * @LastEditors: zhoufei
- * @LastEditTime: 2022-06-07 11:57:37
- * @FilePath: /sdc/Users/software/Documents/go/utils/slice.go
+ * @LastEditTime: 2022-06-08 17:02:04
+ * @FilePath: /utils/slice.go
  * @Description:
  *
  * Copyright (c) 2022 by zhoufei, All Rights Reserved.
@@ -21,6 +21,15 @@ func SliceIsContain[T any](array []T, value T) (index int, ok bool) {
 	return -1, false
 }
 
+func Reverse(s string) string {
+	bs := []byte(s)
+	length := len(bs)
+	for i := 0; i < length/2; i++ {
+		bs[i], bs[length-i-1] = bs[length-i-1], bs[i]
+	}
+	return string(bs)
+}
+
 func SliceDel[T comparable](array []T, values ...T) []T {
 	if len(values) == 0 {
 		return array

slice_test.go

@@ -2,7 +2,7 @@
  * @Author: zhoufei
  * @Date: 2022-05-25 14:41:48
  * @LastEditors: zhoufei
- * @LastEditTime: 2022-06-07 14:19:50
+ * @LastEditTime: 2022-06-08 17:21:39
  * @FilePath: /utils/slice_test.go
  * @Description:
  *
@@ -12,6 +12,7 @@ package utils
 
 import (
 	"testing"
+	"unicode/utf8"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -25,3 +26,20 @@ func TestSliceDel(t *testing.T) {
 	assert.Equal(t, []string{"a", "b"}, SliceDel([]string{"a", "b", "c"}, "c"))
 	assert.Equal(t, []string{"a", "b", "c"}, SliceDel([]string{"a", "b", "c"}))
 }
+
+func FuzzReverse(f *testing.F) {
+	str_slice := []string{"abc", "bb"}
+	for _, v := range str_slice {
+		f.Add(v)
+	}
+	f.Fuzz(func(t *testing.T, str string) {
+		rev_str1 := Reverse(str)
+		rev_str2 := Reverse(rev_str1)
+		if str != rev_str2 {
+			t.Errorf("fuzz test failed. str:%s, rev_str1:%s, rev_str2:%s", str, rev_str1, rev_str2)
+		}
+		if utf8.ValidString(str) && !utf8.ValidString(rev_str1) {
+			t.Errorf("reverse result is not utf8. str:%s, len: %d, rev_str1:%s", str, len(str), rev_str1)
+		}
+	})
+}