code: package zemberek.apps.lm;
  
  import com.google.common.io.Files;
  import com.google.common.io.Resources;
  import java.io.File;
  import java.io.IOException;
  import java.net.URL;
  import org.junit.Assert;
  import org.junit.Test;
  import zemberek.lm.compression.SmoothLm;
  
  public class CompressLmTest {
  
    URL TINY_ARPA_URL = Resources.getResource("lm/tiny.arpa");
  
    File getTinyArpaFile() throws IOException {
      File tmp = File.createTempFile("tiny", ".arpa");
      Files.copy(new File(TINY_ARPA_URL.getFile()), tmp);
      return tmp;
    }
  
    @Test
    public void testConversion() throws IOException {
      File arpaFile = getTinyArpaFile();
      File sm = new File(System.currentTimeMillis() + "-test-lm.smooth");
      sm.deleteOnExit();
      new CompressLm().execute(
          "-in",
          arpaFile.getAbsolutePath(),
          "-out",
          sm.getAbsolutePath(),
          "-spaceUsage", "16-16-16");
      Assert.assertTrue(sm.exists());
      SmoothLm lm = SmoothLm.builder(sm).build();
      Assert.assertEquals(3, lm.getOrder());
    }
  }
  