add test for 107

Author: fishercoder1534

src/test/java/com/fishercoder/_107Test.java

@@ -0,0 +1,28 @@
+package com.fishercoder;
+
+import com.fishercoder.common.classes.TreeNode;
+import com.fishercoder.common.utils.CommonUtils;
+import com.fishercoder.common.utils.TreeUtils;
+import com.fishercoder.solutions._107;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.util.Arrays;
+
+public class _107Test {
+    private static _107.Solution1 solution1;
+    private static TreeNode root;
+
+    @BeforeClass
+    public static void setup() {
+        solution1 = new _107.Solution1();
+    }
+
+    @Test
+    public void test1() {
+        root = TreeUtils.constructBinaryTree(Arrays.asList(3, 9, 20, null, null, 15, 7));
+        TreeUtils.printBinaryTree(root);
+        CommonUtils.printListList(solution1.levelOrder(root));
+    }
+
+}