code: package zemberek.embedding.fasttext;
  
  import java.io.IOException;
  import java.nio.file.Path;
  import java.nio.file.Paths;
  import org.junit.Ignore;
  import org.junit.Test;
  import zemberek.core.embeddings.Args;
  import zemberek.core.embeddings.EmbeddingHashProviders;
  import zemberek.core.embeddings.FastText;
  import zemberek.core.embeddings.FastText.EvaluationResult;
  import zemberek.core.embeddings.FastTextTrainer;
  import zemberek.core.logging.Log;
  
  public class FastTextTest {
  
    /**
     * Runs the dbpedia classification task. run with -Xms8G or more.
     */
    @Test
    @Ignore("Not an actual Test.")
    public void dbpediaClassificationTest() throws Exception {
  
      Path inputRoot = Paths.get("/media/aaa/3t/aaa/fasttext");
      Path trainFile = inputRoot.resolve("dbpedia.train");
      Path modelPath = Paths.get("/media/aaa/3t/aaa/fasttext/dbpedia.model.bin");
  
      FastText fastText;
  
      if (modelPath.toFile().exists()) {
        fastText = FastText.load(modelPath);
      } else {
        Args argz = Args.forSupervised();
        argz.thread = 4;
        argz.epoch = 5;
        argz.wordNgrams = 2;
        argz.minCount = 1;
        argz.lr = 0.1;
        argz.dim = 32;
        argz.bucket = 5_000_000;
  
        fastText = new FastTextTrainer(argz).train(trainFile);
        fastText.saveModel(modelPath);
      }
  
      Path testFile = inputRoot.resolve("dbpedia.test");
      Log.info("Testing started.");
      EvaluationResult result = fastText.test(testFile, 1);
      Log.info(result.toString());
    }
  
    /**
     * Runs the dbpedia classification task. run with -Xms8G or more.
     */
    @Test
    @Ignore("Not an actual Test.")
    public void quantizationTest() throws Exception {
  
      Path inputRoot = Paths.get("/home/ahmetaa/projects/fastText/data");
      Path trainFile = inputRoot.resolve("dbpedia.train");
      //Path trainFile = inputRoot.resolve("train.10k");
      Path modelPath = inputRoot.resolve("10k.model.bin");
      Path quantizedModelPath = inputRoot.resolve("10k.model.qbin");
      Path testFile = inputRoot.resolve("dbpedia.test");
  
      Args argz = Args.forSupervised();
      argz.thread = 4;
      argz.epoch = 15;
      argz.wordNgrams = 2;
      argz.minCount = 5;
      argz.lr = 0.1;
      argz.dim = 30;
      argz.bucket = 1000_000;
  
      FastText fastText = FastText.load(modelPath);
      //FastText fastText = FastText.train(trainFile, argz);
  
      fastText.saveModel(modelPath);
      Log.info("Testing started.");
      test(fastText,testFile, 1);
      fastText = FastText.load(modelPath);
      test(fastText,testFile, 1);
  
      argz.qnorm = false;
      argz.cutoff = 15000;
      fastText = fastText.quantize(modelPath, argz);
      fastText.saveModel(quantizedModelPath);
      Log.info("Testing quantization result.");
      test(fastText, testFile, 1);
      fastText = FastText.load(quantizedModelPath);
      Log.info("Testing after loading quantized model.");
      test(fastText,testFile, 1);
    }
  
    private void test(FastText f, Path testPath, int k) throws IOException {
      EvaluationResult result = f.test(testPath, k);
      Log.info(result.toString());
    }
  
    /**
     * Runs the cooking label guessing task. run with -Xms8G or more.
     */
    @Test
    @Ignore("Not an actual Test.")
    public void classificationTest() throws Exception {
  
      Path inputRoot = Paths.get("/home/ahmetaa/data/fasttext");
      Path trainFile = inputRoot.resolve("cooking.train");
      //Path trainFile = inputRoot.resolve("train.10k");
      Path modelPath = inputRoot.resolve("cooking.model.bin");
      Path quantizedModelPath = inputRoot.resolve("cooking.model.qbin");
      Path testFile = inputRoot.resolve("cooking.valid");
  
      Args argz = Args.forSupervised();
      argz.thread = 4;
      argz.epoch = 25;
      argz.wordNgrams = 2;
      argz.minCount = 1;
      argz.lr = 1.0;
      argz.dim = 100;
      argz.bucket = 1000_000;
  
      FastText fastText;
  /*    if(modelPath.toFile().exists())
        fastText = FastText.load(modelPath);
      else*/
      fastText = new FastTextTrainer(argz).train(trainFile);
  
      fastText.saveModel(modelPath);
      Log.info("Testing started.");
      test(fastText,testFile, 1);
      fastText = FastText.load(modelPath);
      test(fastText,testFile, 1);
  
      argz.qnorm = false;
      argz.cutoff = 3000;
      fastText = fastText.quantize(modelPath, argz);
      fastText.saveModel(quantizedModelPath);
      Log.info("Testing quantization result.");
      test(fastText,testFile, 1);
      fastText = FastText.load(quantizedModelPath);
      Log.info("Testing after loading quantized model.");
      test(fastText,testFile, 1);
    }
  
    /**
     * Generates word vectors using skip-gram model. run with -Xms8G or more.
     */
    @Test
    @Ignore("Not an actual Test.")
    public void skipgram() throws Exception {
      Args argz = Args.forWordVectors(Args.model_name.skipGram);
      argz.thread = 4;
      argz.epoch = 10;
      argz.dim = 100;
      argz.bucket = 2_000_000;
      argz.minn = 3;
      argz.maxn = 6;
      argz.subWordHashProvider = new EmbeddingHashProviders.CharacterNgramHashProvider(argz.minn,
          argz.maxn);
  
      Path input = Paths.get("/home/ahmetaa/data/nlp/corpora/sentences.50k");
  
      Path outRoot = Paths.get("/home/ahmetaa/data/fasttext");
  
      FastText fastText = new FastTextTrainer(argz).train(input);
      Path vectorFile = outRoot.resolve("sentences-50k-skipgram.vec");
      Log.info("Saving vectors to %s", vectorFile);
      fastText.saveVectors(vectorFile);
    }
  }
  