61 lines
1.9 KiB
Java
61 lines
1.9 KiB
Java
/**
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* The MIT License
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* Copyright (c) 2014 Ilkka Seppälä
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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package com.iluwatar.nullobject;
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import org.junit.Test;
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import static org.junit.Assert.*;
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/**
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* Date: 12/26/15 - 11:47 PM
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*
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* @author Jeroen Meulemeester
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*/
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public class NullNodeTest {
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/**
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* Verify if {@link NullNode#getInstance()} actually returns the same object instance
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*/
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@Test
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public void testGetInstance() {
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final NullNode instance = NullNode.getInstance();
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assertNotNull(instance);
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assertSame(instance, NullNode.getInstance());
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}
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@Test
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public void testFields() {
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final NullNode node = NullNode.getInstance();
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assertEquals(0, node.getTreeSize());
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assertNull(node.getName());
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assertNull(node.getLeft());
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assertNull(node.getRight());
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}
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@Test
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public void testWalk() throws Exception {
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NullNode.getInstance().walk();
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}
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}
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