import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertSame;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;

import org.junit.jupiter.api.BeforeEach;

          }
        };
    Function<Object, String> backward = toStringFunction();

    Converter<String, Number> converter = Converter.<String, Number>from(forward, backward);

    assertNull(converter.convert(null));
    assertNull(converter.reverse().convert(null));

    assertEquals((Integer) 5, converter.convert("5"));
    assertEquals("5", converter.reverse().convert(5));
  }

        ViewHelper.ActionHook actionHook = new ViewHelper.ActionHook();

        try {
            assertNull(actionHook.godHandPrologue(null, runtime -> null));
            assertNull(actionHook.godHandMonologue(null, runtime -> null));
            actionHook.godHandEpilogue(null, runtime -> {});
            assertNull(actionHook.hookBefore(null, runtime -> null));
            actionHook.hookFinally(null, runtime -> {});

    assertTrue(future.isDone());
    assertTrue(future.isCancelled());
  }

  public void testAwaitClear() {
    WeakReference<Object> ref = new WeakReference<>(new Object());
    GcFinalization.awaitClear(ref);
    assertNull(ref.get());
  }

  public void testAwaitDone_finalizationPredicate() {
    WeakHashMap<Object, Object> map = new WeakHashMap<>();
    map.put(new Object(), Boolean.TRUE);
    GcFinalization.awaitDone(

    }

    public void test_nullHandling() {
        // Test with null ParseException
        QueryParseException queryParseException = new QueryParseException(null);
        assertNotNull(queryParseException);
        assertNull(queryParseException.getCause());
        // getMessage() may return null when constructed with null
        // This is expected behavior for exceptions with null cause
    }

    public void test_nestedCause() {

            } catch (Exception e) {
                exceptionHolder[0] = e;
            }
        });

        thread.start();
        thread.join();

        assertNull(exceptionHolder[0]);
        assertNotNull(clientHolder[0]);
    }

    // Test repeated instantiation
    public void test_repeatedInstantiation() {
        // Test that repeated instantiation works correctly

  @Override
  protected ConcurrentMap<K, V> getMap() {
    return (ConcurrentMap<K, V>) super.getMap();
  }

  @MapFeature.Require(SUPPORTS_PUT)
  public void testPutIfAbsent_supportedAbsent() {
    assertNull("putIfAbsent(notPresent, value) should return null", putIfAbsent(e3()));
    expectAdded(e3());
  }

  @MapFeature.Require(SUPPORTS_PUT)
  @CollectionSize.Require(absent = ZERO)

import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertFalse;
import static org.junit.jupiter.api.Assertions.assertNotNull;
import static org.junit.jupiter.api.Assertions.assertNull;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.doAnswer;

    for (int i = 0; i < getNumElements(); i++) {
      assertTrue(
          "toArray(overSizedE[]) should contain element " + expectedSubArray[i],
          subArray.contains(expectedSubArray[i]));
    }
    assertNull(
        "The array element immediately following the end of the collection should be nulled",
        array[getNumElements()]);
    // array[getNumElements() + 1] might or might not have been nulled
  }

        expectedSpan = expectedSpan.span(itr.next());
      }
    }

    try {
      Range<C> span = rangeSet.span();
      assertEquals(expectedSpan, span);
    } catch (NoSuchElementException e) {
      assertNull(expectedSpan);
    }

    // test that asDescendingSetOfRanges is the reverse of asRanges
    assertEquals(Lists.reverse(asRanges), ImmutableList.copyOf(rangeSet.asDescendingSetOfRanges()));
  }