222 增加测试用例

Author: mlkr

Algorithms/0222.count-complete-tree-nodes/count-complete-tree-nodes_test.go

@@ -10,6 +10,12 @@ var questions = []struct {
 	pre, in []int
 	count   int
 }{
+	{
+		[]int{},
+		[]int{},
+		0,
+	},
+
 	{
 		[]int{1, 2, 4, 5, 3, 6},
 		[]int{4, 2, 5, 1, 6, 3},