code: package zemberek.corpus;
  
  import com.google.common.base.Splitter;
  import java.io.IOException;
  import java.nio.file.Files;
  import java.nio.file.Path;
  import java.sql.SQLException;
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  import org.junit.Assert;
  import org.junit.Test;
  import zemberek.core.io.IOUtil;
  import zemberek.core.text.TextIO;
  import zemberek.tokenization.TurkishSentenceExtractor;
  import zemberek.tokenization.TurkishTokenizer;
  
  public class CorpusDbTest {
  
    @Test
    public void saveLoadDocument() throws IOException, SQLException {
      Path tempDir = Files.createTempDirectory("foo");
      CorpusDb storage = new CorpusDb(tempDir);
  
      Map<Integer, CorpusDocument> docMap = saveDocuments(storage);
  
      for (Integer key : docMap.keySet()) {
        CorpusDocument expected = docMap.get(key);
        CorpusDocument actual = storage.loadDocumentByKey(key);
        Assert.assertEquals(expected.id, actual.id);
        Assert.assertEquals(expected.content, actual.content);
      }
      IOUtil.deleteTempDir(tempDir);
    }
  
    private Map<Integer, CorpusDocument> saveDocuments(CorpusDb storage) throws IOException {
      List<WebDocument> corpus = WebCorpus.loadDocuments(
          TextIO.loadLinesFromResource("/corpus/test-corpus.txt"));
  
      List<CorpusDocument> docs = WebCorpus.convertToCorpusDocument(corpus);
      Map<Integer, CorpusDocument> docMap = new HashMap<>();
  
      for (CorpusDocument doc : docs) {
        int key = storage.saveDocument(doc);
        docMap.put(key, doc);
      }
      return docMap;
    }
  
    @Test
    public void search() throws IOException, SQLException {
      Path tempDir = Files.createTempDirectory("foo");
      CorpusDb storage = new CorpusDb(tempDir);
  
      Map<Integer, CorpusDocument> docMap = saveDocuments(storage);
  
      for (Integer key : docMap.keySet()) {
        CorpusDocument doc = docMap.get(key);
        List<String> paragraphs = Splitter.on("\n").splitToList(doc.content);
        List<String> sentences = TurkishSentenceExtractor.DEFAULT.fromParagraphs(paragraphs);
        storage.saveSentences(key, sentences);
      }
      List<SentenceSearchResult> searchResults = storage.search("milyar");
      for (SentenceSearchResult searchResult : searchResults) {
        System.out.println(searchResult);
      }
  
      IOUtil.deleteTempDir(tempDir);
    }
  
  }
  