diff --git a/main_test.go b/main_test.go
index 5beb534..faaec26 100644
--- a/main_test.go
+++ b/main_test.go
@@ -15,7 +15,7 @@ const (
 type Node struct {
 	Prev *Node
 	Next *Node
-	Name []byte
+	Name []rune
 	Type Type
 }
 
@@ -36,33 +36,62 @@ type Node struct {
 // 	return string(path)
 // }
 
-func xPath(spath string) {
-	var path []byte = make([]byte, len(spath)+1)
-	copy(path, spath)
+func toString(root *Node) string {
+	var content string
+
+	for root != nil {
+
+		content += string(root.Name)
+		if root.Type == TypeAllChildren {
+			content += "//"
+		} else {
+			content += "/"
+		}
+		root = root.Next
+	}
+
+	return content
+}
+
+func xPath(spath string) string {
+
+	var path []rune = []rune(spath)
+	path = append(path, ' ')
 
 	root := &Node{}
 	cur := root
 
 	for i := 0; i < len(spath); i++ {
 		c := path[i]
-		if c == '/' {
+		switch c {
+		case '/':
 			if path[i+1] == '/' {
 				cur.Type = TypeAllChildren
+				i++
 			} else {
 				cur.Type = TypeChild
 			}
 
-			cur.Next = &Node{Next: cur}
+			if len(cur.Name) == 0 {
+				continue
+			}
+
+			cur.Next = &Node{Prev: cur}
 			cur = cur.Next
+		// case '(': 先拿括号
+
+		default:
+			cur.Name = append(cur.Name, c)
 		}
-		cur.Name = append(cur.Name, c)
 	}
 
+	return toString(root)
 }
 
 func TestMain(t *testing.T) {
-	// 	t.Error(xPath("/a/../../b/../c//.//"))
+	// t.Error(xPath("/a/../../b/../c//.//"))
 	// 	t.Error(xPath("/a/./b/../../c/"))
 	// 	t.Error(xPath("/"))
-	// 	t.Error(xPath("/a//b////c/d//././/.."))
+	t.Error(xPath("/a/./b/../../c/"))
+	// t.Error(xPath("/a//b////c/d//././/.."))
 }