test/jdk/java/util/Optional/Basic.java

*** 31,40 ****
--- 31,41 ----
  
  import java.util.List;
  import java.util.NoSuchElementException;
  import java.util.Optional;
  import java.util.concurrent.atomic.AtomicBoolean;
+ import java.util.function.Predicate;
  
  import static java.util.stream.Collectors.toList;
  
  import static org.testng.Assert.*;
  import org.testng.annotations.Test;
*** 50,59 ****
--- 51,61 ----
          assertFalse(empty.equals(Optional.of("unexpected")));
          assertFalse(Optional.of("unexpected").equals(empty));
          assertFalse(empty.equals("unexpected"));
  
          assertFalse(empty.isPresent());
+         assertTrue(empty.isEmpty());
          assertEquals(empty.hashCode(), 0);
          assertEquals(empty.orElse("x"), "x");
          assertEquals(empty.orElseGet(() -> "y"), "y");
  
          assertThrows(NoSuchElementException.class, () -> empty.get());
*** 85,94 ****
--- 87,97 ----
          assertFalse(opt.equals(Optional.of("unexpected")));
          assertFalse(Optional.of("unexpected").equals(opt));
          assertFalse(opt.equals("unexpected"));
  
          assertTrue(opt.isPresent());
+         assertFalse(opt.isEmpty());
          assertEquals(opt.hashCode(), expected.hashCode());
          assertEquals(opt.orElse("unexpected"), expected);
          assertEquals(opt.orElseGet(() -> "unexpected"), expected);
  
          assertEquals(opt.get(), expected);