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 *  *  information regarding copyright ownership.
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package org.deeplearning4j.text.documentiterator;

import org.deeplearning4j.BaseDL4JTest;
import org.deeplearning4j.text.sentenceiterator.BasicLineIterator;
import org.deeplearning4j.text.sentenceiterator.SentenceIterator;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Tag;
import org.junit.jupiter.api.Test;
import org.nd4j.common.resources.Resources;
import org.nd4j.common.tests.tags.NativeTag;
import org.nd4j.common.tests.tags.TagNames;

import java.io.File;

import static org.junit.jupiter.api.Assertions.assertEquals;
@Tag(TagNames.FILE_IO)
@NativeTag
public class BasicLabelAwareIteratorTest extends BaseDL4JTest {



    @BeforeEach
    public void setUp() throws Exception {}

    @Test
    public void testHasNextDocument1() throws Exception {
        File inputFile = Resources.asFile("big/raw_sentences.txt");
        SentenceIterator iter = new BasicLineIterator(inputFile.getAbsolutePath());

        BasicLabelAwareIterator iterator = new BasicLabelAwareIterator.Builder(iter).setLabelTemplate("DOCZ_").build();

        int cnt = 0;
        while (iterator.hasNextDocument()) {
            iterator.nextDocument();
            cnt++;
        }

        assertEquals(97162, cnt);

        LabelsSource generator = iterator.getLabelsSource();

        assertEquals(97162, generator.getLabels().size());
        assertEquals("DOCZ_0", generator.getLabels().get(0));
    }

    @Test
    public void testHasNextDocument2() throws Exception {

        File inputFile = Resources.asFile("big/raw_sentences.txt");
        SentenceIterator iter = new BasicLineIterator(inputFile.getAbsolutePath());

        BasicLabelAwareIterator iterator = new BasicLabelAwareIterator.Builder(iter).setLabelTemplate("DOCZ_").build();

        int cnt = 0;
        while (iterator.hasNextDocument()) {
            iterator.nextDocument();
            cnt++;
        }

        assertEquals(97162, cnt);

        iterator.reset();

        cnt = 0;
        while (iterator.hasNextDocument()) {
            iterator.nextDocument();
            cnt++;
        }

        assertEquals(97162, cnt);

        LabelsSource generator = iterator.getLabelsSource();

        // this is important moment. Iterator after reset should not increase number of labels attained
        assertEquals(97162, generator.getLabels().size());
        assertEquals("DOCZ_0", generator.getLabels().get(0));
    }
}
