code: package net.openhft.chronicle.map;
  
  import net.openhft.chronicle.core.values.LongValue;
  import org.junit.Rule;
  import org.junit.Test;
  import org.junit.rules.TemporaryFolder;
  
  import java.io.File;
  import java.io.IOException;
  
  import static org.junit.Assert.assertTrue;
  
  public class Issue354bTest {
  
      @Rule
      public TemporaryFolder testFolder = new TemporaryFolder();
  
      @Test
      public void build_toFile() throws IOException {
          String baseDirectory = testFolder.getRoot().toString();
          File file = new File(baseDirectory, "chronicle.dat");
          ChronicleMap<LongValue, LongValue> map = ChronicleMapBuilder.of(LongValue.class, LongValue.class)
                  .name("test")
                  .entries(5)
                  .createOrRecoverPersistedTo(file, true);
  
          assertTrue(file.isFile());
      }
  
  }
  