You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 938. Range Sum of BST_test.go
    path of file: ./repos/LeetCode-Go/leetcode/0938.Range-Sum-of-BST
    
    the code of the file until where you have to start completion: package leetcode

import (
	"fmt"
	"testing"

	"github.com/halfrost/LeetCode-Go/structures"
)

type question938 struct {
	para938
	ans938
}

// para 
    
func Test_Problem938(t *testing.T) {

	qs := []question938{

		{
			para938{[]int{10, 5, 15, 3, 7, structures.NULL, 18}, 7, 15},
			ans938{32},
		},

		{
			para938{[]int{10, 5, 15, 3, 7, 13, 18, 1, structures.NULL, 6}, 6, 10},
			ans938{23},
		},
	}

	fmt.Printf("------------------------Leetcode Problem 938------------------------\n")

	for _, q := range qs {
		_, p := q.ans938, q.para938
		fmt.Printf("【input】:%v      ", p)
		rootOne := structures.Ints2TreeNode(p.one)
		fmt.Printf("【output】:%v      \n", rangeSumBST(rootOne, p.low, p.high))
	}
	fmt.Printf("\n\n\n")
}