/*
 * Copyright 2012 Takao Nakaguchi
 *
 * Licensed 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.trie4j.louds;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;

import org.junit.Assert;
import org.junit.Test;
import org.trie4j.AbstractImmutableTrieTest;
import org.trie4j.Node;
import org.trie4j.Trie;

public class LOUDSTrieTest
extends AbstractImmutableTrieTest<LOUDSTrie>{
	@Override
	protected LOUDSTrie buildSecond(Trie firstTrie) {
		return new LOUDSTrie(firstTrie, 65536);
	}

	@Test
	public void test() throws Exception{
		String[] words = {"こんにちは", "さようなら", "おはよう", "おおきなかぶ", "おおやまざき"};
		Trie lt = trieWithWords(words);
		for(String w : words){
			Assert.assertTrue(w, lt.contains(w));
		}
		Assert.assertFalse(lt.contains("おやすみなさい"));

		StringBuilder b = new StringBuilder();
		Node[] children = lt.getRoot().getChildren();
		for(Node n : children){
			char[] letters = n.getLetters();
			b.append(letters[0]);
		}
		Assert.assertEquals("おこさ", b.toString());
	}

	@Test
	public void test_save_load() throws Exception{
		String[] words = {"こんにちは", "さようなら", "おはよう", "おおきなかぶ", "おおやまざき"};
		Trie lt = trieWithWords(words);
		ByteArrayOutputStream baos = new ByteArrayOutputStream();
		ObjectOutputStream oos = new ObjectOutputStream(baos);
		try{
			oos.writeObject(lt);
		} finally{
			oos.flush();
		}
		lt = (Trie)new ObjectInputStream(new ByteArrayInputStream(baos.toByteArray())).readObject();
		for(String w : words){
			Assert.assertTrue(lt.contains(w));
		}
		Assert.assertFalse(lt.contains("おやすみなさい"));

		StringBuilder b = new StringBuilder();
		Node[] children = lt.getRoot().getChildren();
		for(Node n : children){
			char[] letters = n.getLetters();
			b.append(letters[0]);
		}
		Assert.assertEquals("おこさ", b.toString());
	}
}