cache.put(10, 20);
    assertThat(cache.getIfPresent(10)).isEqualTo(20);

    fakeTicker.advance(1000, MILLISECONDS);
    assertThat(cache.getIfPresent(10)).isNull();
  }

  @Test
  public void expireAfterWriteAndAccess() {
    Cache<Integer, Integer> cache =
        CacheBuilder.newBuilder()
            .expireAfterWrite(1000, MILLISECONDS)

    cache.put(10, 20);
    assertThat(cache.getIfPresent(10)).isEqualTo(20);

    fakeTicker.advance(1000, MILLISECONDS);
    assertThat(cache.getIfPresent(10)).isNull();
  }

  @Test
  public void expireAfterWriteAndAccess() {
    Cache<Integer, Integer> cache =
        CacheBuilder.newBuilder()
            .expireAfterWrite(1000, MILLISECONDS)

   * TreeMultimap.
   */
  public void testCreateFromTreeMultimap() {
    Multimap<Double, Double> tree = TreeMultimap.create(KEY_COMPARATOR, VALUE_COMPARATOR);
    tree.put(1.0, 2.0);
    tree.put(2.0, 3.0);
    tree.put(3.0, 4.0);
    tree.put(4.0, 5.0);

    TreeMultimap<Double, Double> copyFromTree = TreeMultimap.create(tree);
    assertEquals(tree, copyFromTree);

      assertThrows(IndexOutOfBoundsException.class, () -> aa.lazySet(index, 1.0));
      assertThrows(IndexOutOfBoundsException.class, () -> aa.compareAndSet(index, 1.0, 2.0));
      assertThrows(IndexOutOfBoundsException.class, () -> aa.weakCompareAndSet(index, 1.0, 2.0));
      assertThrows(IndexOutOfBoundsException.class, () -> aa.getAndAdd(index, 1.0));
      assertThrows(IndexOutOfBoundsException.class, () -> aa.addAndGet(index, 1.0));
    }

   * TreeMultimap.
   */
  public void testCreateFromTreeMultimap() {
    Multimap<Double, Double> tree = TreeMultimap.create(KEY_COMPARATOR, VALUE_COMPARATOR);
    tree.put(1.0, 2.0);
    tree.put(2.0, 3.0);
    tree.put(3.0, 4.0);
    tree.put(4.0, 5.0);

    TreeMultimap<Double, Double> copyFromTree = TreeMultimap.create(tree);
    assertEquals(tree, copyFromTree);

      assertThrows(IndexOutOfBoundsException.class, () -> aa.lazySet(index, 1.0));
      assertThrows(IndexOutOfBoundsException.class, () -> aa.compareAndSet(index, 1.0, 2.0));
      assertThrows(IndexOutOfBoundsException.class, () -> aa.weakCompareAndSet(index, 1.0, 2.0));
      assertThrows(IndexOutOfBoundsException.class, () -> aa.getAndAdd(index, 1.0));
      assertThrows(IndexOutOfBoundsException.class, () -> aa.addAndGet(index, 1.0));
    }

              public void realRun() {
                while (!at.compareAndSet(2.0, 3.0)) {
                  Thread.yield();
                }
              }
            });

    assertTrue(at.compareAndSet(1.0, 2.0));
    awaitTermination(t);
    assertBitEquals(3.0, at.get());
  }

  /** repeated weakCompareAndSet succeeds in changing value when equal to expected */
  public void testWeakCompareAndSet() {

              public void realRun() {
                while (!at.compareAndSet(2.0, 3.0)) {
                  Thread.yield();
                }
              }
            });

    assertTrue(at.compareAndSet(1.0, 2.0));
    awaitTermination(t);
    assertBitEquals(3.0, at.get());
  }

  /** repeated weakCompareAndSet succeeds in changing value when equal to expected */
  public void testWeakCompareAndSet() {

	CADDW	$31, X5					// fd22
	CADDIW	$-32, X5				// 8132
	CADDIW	$31, X5					// fd22
	CADDI16SP $-512, SP				// 0171
	CADDI16SP $496, SP				// 7d61
	CADDI4SPN $4, SP, X10				// 4800
	CADDI4SPN $1020, SP, X10			// e81f
	CSLLI	$63, X5					// fe12
	CSRLI	$63, X10				// 7d91
	CSRAI	$63, X10				// 7d95
	CAND	$-32, X10				// 0199
	CAND	$31, X10				// 7d89
	CANDI	$-32, X10				// 0199
	CANDI	$31, X10				// 7d89

    }

    @Test
    public void test_smartSummary_headTailRatio() {
        // Use 1000-char content with summaryMaxChars=500, no sources
        // omitMarker="\n...[omitted]...\n" (17 chars), suffix="", bodyBudget=500-0-17=483
        // headChars = (int)(483 * 0.6) = 289, tailChars = 483 - 289 = 194
        final String content = "A".repeat(1000);
        final ChatMessage msg = ChatMessage.assistantMessage(content);