GoogleTTSTextProcessorTest.java

/**
 * Copyright (c) 2010-2016 by the respective copyright holders.
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 */
package org.openhab.io.multimedia.internal.tts;

import java.util.List;

import org.junit.Before;
import org.junit.Test;

import junit.framework.Assert;

/**
 * Test class for {@link GoogleTTSTextProcessor} of the Google TTS bundle.
 *
 * @author Dominic Lerbs
 * @since 1.7.0
 *
 */
public class GoogleTTSTextProcessorTest {

    private GoogleTTSTextProcessor textProcessor;
    private static final int MAX_SENTENCE_LENGTH = 100;

    @Before
    public void init() {
        textProcessor = new GoogleTTSTextProcessor(MAX_SENTENCE_LENGTH);
    }

    @Test
    public void testSplitIntoChunks() {
        String emptySentence = "";
        List<String> splitSentences = textProcessor.splitIntoChunks(emptySentence);
        Assert.assertTrue(splitSentences.isEmpty());

        String oneWord = "One";
        splitSentences = textProcessor.splitIntoChunks(oneWord);
        Assert.assertEquals(1, splitSentences.size());
        Assert.assertEquals(oneWord, splitSentences.get(0));

        String oneSentence = "This is a normal sentence";
        splitSentences = textProcessor.splitIntoChunks(oneSentence);
        Assert.assertEquals(1, splitSentences.size());
        Assert.assertEquals(oneSentence, splitSentences.get(0));

        splitSentences = textProcessor.splitIntoChunks(oneSentence + ".");
        Assert.assertEquals(1, splitSentences.size());
        Assert.assertEquals(oneSentence, splitSentences.get(0));

        String threeSentences = "This is the first Sentence. But there are more! In fact, there are three...";
        splitSentences = textProcessor.splitIntoChunks(threeSentences);
        Assert.assertEquals(3, splitSentences.size());
        Assert.assertEquals("This is the first Sentence", splitSentences.get(0));
        Assert.assertEquals("But there are more", splitSentences.get(1));
        Assert.assertEquals("In fact, there are three", splitSentences.get(2));

        String longSentence = "The method should split sentences which are longer than a given limit, "
                + "as the Google Translation Service can only handle up to 100 characters at a time";
        Assert.assertTrue(
                longSentence.length() > MAX_SENTENCE_LENGTH && longSentence.length() < MAX_SENTENCE_LENGTH * 2);
        int splitIndex = longSentence.substring(0, MAX_SENTENCE_LENGTH).lastIndexOf(" ");
        splitSentences = textProcessor.splitIntoChunks(longSentence);
        Assert.assertEquals(2, splitSentences.size());
        Assert.assertEquals(longSentence.substring(0, splitIndex), splitSentences.get(0));
        Assert.assertEquals(longSentence.substring(splitIndex + 1), splitSentences.get(1));
    }

    @Test
    public void testCustomDelimiters() {
        String customDelimiters = "。！";
        textProcessor.setCustomSentenceDelimiters(customDelimiters);
        String sentence = "七転八起。一期一会！";
        List<String> splitSentences = textProcessor.splitIntoChunks(sentence);
        Assert.assertEquals(2, splitSentences.size());
        Assert.assertEquals("七転八起", splitSentences.get(0));
        Assert.assertEquals("一期一会", splitSentences.get(1));
    }

    @Test
    public void testUrlEncodeSentence() {
        String normalSentence = "This is a normal sentence";
        String encodedSentence = GoogleTTSTextProcessor.urlEncodeSentence(normalSentence);
        Assert.assertEquals("This%20is%20a%20normal%20sentence", encodedSentence);

        String specialCharsSentence = "Ä 文章 with ßpecial chÆracters";
        encodedSentence = GoogleTTSTextProcessor.urlEncodeSentence(specialCharsSentence);
        Assert.assertEquals("%C3%84%20%E6%96%87%E7%AB%A0%20with%20%C3%9Fpecial%20ch%C3%86racters", encodedSentence);
    }
}