@@ -0,0 +1,730 @@
+package com.fishercoder;%0A%0Aimport com.fishercoder.common.classes.TreeNode;%0Aimport com.fishercoder.common.utils.CommonUtils;%0Aimport com.fishercoder.common.utils.TreeUtils;%0Aimport com.fishercoder.solutions._107;%0Aimport org.junit.BeforeClass;%0Aimport org.junit.Test;%0A%0Aimport java.util.Arrays;%0A%0Apublic class _107Test %7B%0A    private static _107.Solution1 solution1;%0A    private static TreeNode root;%0A%0A    @BeforeClass%0A    public static void setup() %7B%0A        solution1 = new _107.Solution1();%0A    %7D%0A%0A    @Test%0A    public void test1() %7B%0A        root = TreeUtils.constructBinaryTree(Arrays.asList(3, 9, 20, null, null, 15, 7));%0A        TreeUtils.printBinaryTree(root);%0A        CommonUtils.printListList(solution1.levelOrder(root));%0A    %7D%0A%0A%7D

add test for 107