update

Author: cn-src

src/test/java/cn/javaer/snippets/model/TreeNodeTest.java

@@ -2,7 +2,7 @@
 
 import org.junit.jupiter.api.Test;
 
-import static org.assertj.core.api.Assertions.assertThat;
+import static cn.javaer.snippets.box.test.Assertions.assertThat;
 
 /**
  * @author cn-src
@@ -15,5 +15,8 @@ void addChildren() {
         t1.addChildren(new TreeNode("t1_1"));
         t1.addChildren(new TreeNode("t1_2"));
         assertThat(t1.getChildren()).hasSize(2);
+        assertThat(t1).hasTitle("t1");
+        assertThat(t1.getChildren().get(0)).hasTitle("t1_1");
+        assertThat(t1.getChildren().get(1)).hasTitle("t1_2");
     }
 }