| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.karaf.shell.dev.util; |
| |
| import java.io.BufferedReader; |
| import java.io.IOException; |
| import java.io.PrintWriter; |
| import java.io.StringReader; |
| import java.io.StringWriter; |
| import java.util.Set; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.assertNotNull; |
| import static org.junit.Assert.assertTrue; |
| import org.junit.Test; |
| |
| /** |
| * Test cases for {@link org.apache.karaf.shell.dev.util.Tree} |
| * and {@link org.apache.karaf.shell.dev.util.Node} |
| */ |
| public class TreeTest { |
| |
| @Test |
| public void writeTreeWithOneChild() throws IOException { |
| Tree<String> tree = new Tree<String>("root"); |
| tree.addChild("child"); |
| |
| BufferedReader reader = read(tree); |
| |
| assertEquals("root" , reader.readLine()); |
| assertEquals("+- child" , reader.readLine()); |
| } |
| |
| @Test |
| public void writeTreeWithOneChildAndNodeConverter() throws IOException { |
| Tree<String> tree = new Tree<String>("root"); |
| tree.addChild("child"); |
| |
| StringWriter writer = new StringWriter(); |
| tree.write(new PrintWriter(writer), new Tree.Converter<String>() { |
| public String toString(Node<String> node) { |
| return "my " + node.getValue(); |
| } |
| }); |
| |
| BufferedReader reader = new BufferedReader(new StringReader(writer.getBuffer().toString())); |
| |
| assertEquals("my root" , reader.readLine()); |
| assertEquals("+- my child" , reader.readLine()); |
| } |
| |
| @Test |
| public void writeTreeWithChildAndGrandChild() throws IOException { |
| Tree<String> tree = new Tree<String>("root"); |
| Node<String> node = tree.addChild("child"); |
| node.addChild("grandchild"); |
| |
| BufferedReader reader = read(tree); |
| |
| assertEquals("root" , reader.readLine()); |
| assertEquals("+- child" , reader.readLine()); |
| assertEquals(" +- grandchild", reader.readLine()); |
| } |
| |
| @Test |
| public void writeTreeWithTwoChildrenAndOneGrandchild() throws IOException { |
| Tree<String> tree = new Tree<String>("root"); |
| Node<String> child = tree.addChild("child1"); |
| child.addChild("grandchild"); |
| tree.addChild("child2"); |
| |
| BufferedReader reader = read(tree); |
| |
| assertEquals("root" , reader.readLine()); |
| assertEquals("+- child1" , reader.readLine()); |
| assertEquals("| +- grandchild", reader.readLine()); |
| assertEquals("+- child2" , reader.readLine()); |
| } |
| |
| @Test |
| public void flattenTree() throws IOException { |
| Tree<String> tree = new Tree<String>("root"); |
| Node<String> child1 = tree.addChild("child1"); |
| child1.addChild("grandchild"); |
| Node child2 = tree.addChild("child2"); |
| child2.addChild("grandchild"); |
| |
| Set<String> elements = tree.flatten(); |
| assertNotNull(elements); |
| assertEquals(4, elements.size()); |
| assertTrue(elements.contains("root")); |
| assertTrue(elements.contains("child1")); |
| assertTrue(elements.contains("child2")); |
| assertTrue(elements.contains("grandchild")); |
| } |
| |
| @Test |
| public void hasAncestor() throws IOException { |
| Tree<String> tree = new Tree<String>("root"); |
| Node<String> child1 = tree.addChild("child1"); |
| child1.addChild("grandchild"); |
| Node child2 = tree.addChild("child2"); |
| Node node = child2.addChild("grandchild2"); |
| |
| assertTrue(node.hasAncestor("child2")); |
| assertTrue(node.hasAncestor("root")); |
| assertFalse(node.hasAncestor("child1")); |
| } |
| |
| private BufferedReader read(Tree<String> tree) { |
| StringWriter writer = new StringWriter(); |
| tree.write(new PrintWriter(writer)); |
| |
| BufferedReader reader = new BufferedReader(new StringReader(writer.getBuffer().toString())); |
| return reader; |
| } |
| } |