diff --git a/pkg/structure/hashx/hashx_test.go b/pkg/structure/hashx/hashx_test.go
index 8aa5eac..5913b13 100644
--- a/pkg/structure/hashx/hashx_test.go
+++ b/pkg/structure/hashx/hashx_test.go
@@ -3,6 +3,7 @@ package hashx
 import (
 	"fmt"
 	"reflect"
+	"regexp"
 	"testing"
 	"unsafe"
 
@@ -87,3 +88,26 @@ func string2bytes(s string) []byte {
 	}
 	return *(*[]byte)(unsafe.Pointer(&result))
 }
+
+func TestHashX_Range(t *testing.T) {
+
+	reComp := regexp.MustCompile("a.+")
+	require.True(t, reComp.MatchString("abbs"))
+
+	h := NewHashXSingle()
+	h.Set("abbs", "abbs")
+	h.Set("ppp", "ppp")
+	h.Set("accs", "accs")
+
+	result := h.Range(0, 3, "")
+	require.Len(t, result, 3)
+
+	result = h.Range(0, -1, "")
+	require.Len(t, result, 3)
+
+	result = h.Range(0, -1, "a.+")
+	require.Len(t, result, 2)
+
+	result = h.Range(1, -1, "a.+")
+	require.Len(t, result, 1)
+}