fix issue in repeated rand value of grand.Intn

g/util/grand/grand_intn.go

@@ -7,8 +7,9 @@
 package grand
 
 import (
-    "crypto/rand"
-    "encoding/binary"
+	"crypto/rand"
+	"encoding/binary"
+	"os"
 )
 
 const (
@@ -27,6 +28,7 @@ func init() {
         for {
             if n, err := rand.Read(buffer); err != nil {
                 panic(err)
+                os.Exit(1)
             } else {
                 // 使用缓冲区数据进行一次完整的随机数生成
                 for i := 0; i < n - 4; {
@@ -35,9 +37,12 @@ func init() {
                 }
                 // 充分利用缓冲区数据，随机索引递增
                 step = int(buffer[0])%10
+                if step == 0 {
+                	step = 2
+                }
                 for i := 0; i < n - 4; {
-                    bufferChan <- binary.BigEndian.Uint32(buffer[i : i + 4])
-                    i += step
+                   bufferChan <- binary.BigEndian.Uint32(buffer[i : i + 4])
+                   i += step
                 }
             }
         }

geg/other/test.go

@@ -1,12 +1,15 @@
 package main
 
 import (
-	"github.com/gogf/gf/g/test/gtest"
+	"fmt"
+	"github.com/gogf/gf/g/util/grand"
 )
 
-func test() []byte {
-	return nil
-}
+
+
 func main() {
-	gtest.Assert(test(), nil)
+	for {
+		fmt.Println(grand.Intn(100))
+	}
+
 }