test/jdk/java/util/Optional/BasicDouble.java

*** 30,39 ****
--- 30,41 ----
   */
  
  import java.util.NoSuchElementException;
  import java.util.OptionalDouble;
  import java.util.concurrent.atomic.AtomicBoolean;
+ import java.util.function.DoublePredicate;
+ import java.util.List;
  
  import static org.testng.Assert.*;
  import org.testng.annotations.Test;
  
  public class BasicDouble {
*** 49,58 ****
--- 51,61 ----
          assertFalse(empty.equals(OptionalDouble.of(UNEXPECTED)));
          assertFalse(OptionalDouble.of(UNEXPECTED).equals(empty));
          assertFalse(empty.equals("unexpected"));
  
          assertFalse(empty.isPresent());
+         assertTrue(empty.isEmpty());
          assertEquals(empty.hashCode(), 0);
          assertEquals(empty.orElse(UNEXPECTED), UNEXPECTED);
          assertEquals(empty.orElseGet(() -> UNEXPECTED), UNEXPECTED);
  
          assertThrows(NoSuchElementException.class, () -> empty.getAsDouble());
*** 84,93 ****
--- 87,97 ----
          assertFalse(opt.equals(OptionalDouble.of(UNEXPECTED)));
          assertFalse(OptionalDouble.of(UNEXPECTED).equals(opt));
          assertFalse(opt.equals("unexpected"));
  
          assertTrue(opt.isPresent());
+         assertFalse(opt.isEmpty());
          assertEquals(opt.hashCode(), Double.hashCode(expected));
          assertEquals(opt.orElse(UNEXPECTED), expected);
          assertEquals(opt.orElseGet(() -> UNEXPECTED), expected);
  
          assertEquals(opt.getAsDouble(), expected);