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: 107. Binary Tree Level Order Traversal II_test.go
    path of file: ./repos/LeetCode-Go/leetcode/0107.Binary-Tree-Level-Order-Traversal-II
    
    the code of the file until where you have to start completion: package leetcode

import (
	"fmt"
	"testing"

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

type question107 struct {
	para107
	ans107
}

// para 是参数
// one 代表第一个参数
type para107 struct {
	one []int
}

// ans 是答案
// one 代表第一个答案
type ans107 struct {
	one [][]int
}

func Test_Problem107(t *testing.T) {

	qs := []question107{

		{
			para107{[]int{}},
			ans107{[][]int{}},
		},

		{
    
func Test_Problem107(t *testing.T) {

	qs := []question107{

		{
			para107{[]int{}},
			ans107{[][]int{}},
		},

		{
			para107{[]int{1}},
			ans107{[][]int{{1}}},
		},

		{
			para107{[]int{3, 9, 20, structures.NULL, structures.NULL, 15, 7}},
			ans107{[][]int{{15, 7}, {9, 20}, {3}}},
		},
	}

	fmt.Printf("------------------------Leetcode Problem 107------------------------\n")

	for _, q := range qs {
		_, p := q.ans107, q.para107
		fmt.Printf("【input】:%v      ", p)
		root := structures.Ints2TreeNode(p.one)
		fmt.Printf("【output】:%v      \n", levelOrderBottom(root))
	}
	fmt.Printf("\n\n\n")
}