if (theUnsafe.arrayIndexScale(byte[].class) != 1) {
        throw new AssertionError();
      }
    }
  }

  /**
   * Fallback implementation for when VarHandle and Unsafe are not available in our current
   * environment.
   */
  private enum JavaLittleEndianBytes implements LittleEndianBytes {
    INSTANCE {
      @Override
      public long getLongLittleEndian(byte[] source, int offset) {

   * of Java 20, it always throws an exception, and as of Java 26, the method does not even exist.
   * For now, we continue using it to clean up under older JDKs.
   *
   * Our usages should at least be *relatively* safe: Typically, threads started by a test are dying
   * at the end of the test, so there is no object state put at risk by stopping the threads

      assertThrows(IllegalArgumentException.class, () -> DoubleMath.fuzzyEquals(1, 2, tolerance));
    }
  }

  /*
   * We've split testFuzzyCompare() into multiple tests so that our internal Android test runner has
   * a better chance of completing each within its per-test-method timeout.
   */

  public void testFuzzyCompare0() {
    runTestFuzzyCompare(0);
  }

 *       considered "compiled comments."
 *   <li>An explicit {@code if/throw} (as illustrated below) is always acceptable; we still
 *       recommend using our {@link VerifyException} exception type. Throwing a plain {@link
 *       RuntimeException} is frowned upon.
 *   <li>Use of {@link java.util.Objects#requireNonNull(Object)} is generally discouraged, since

                    customThreadFound.incrementAndGet();
                }
            };

            ThreadDumpUtil.processThreadDump(searchConsumer);

            // Verify that our custom thread was captured
            assertTrue("Should find custom thread in dump", customThreadFound.get() > 0);

        } finally {
            latch.countDown();

    assertThat(simplifyPath("./../../")).isEqualTo("../..");
    assertThat(simplifyPath("./.././../")).isEqualTo("../..");
  }

  /*
   * We co-opt some URI resolution tests for our purposes.
   * Some of the tests have queries and anchors that are a little silly here.
   */

  /** http://gbiv.com/protocols/uri/rfc/rfc2396.html#rfc.section.C.1 */
  public void testRfc2396Normal() {

  }

  public Test testsForHashtable() {
    return MapTestSuiteBuilder.using(
            new TestStringMapGenerator() {
              @Override
              // We are testing Hashtable / testing our tests on Hashtable.
              @SuppressWarnings("JdkObsolete")
              protected Map<String, String> create(Entry<String, String>[] entries) {
                return populate(new Hashtable<String, String>(), entries);

    WeakReference<Object> ref = createWeakReferenceWithFinalizer(finalizerRan);

    await(finalizerRan);
    awaitClear(ref);

    // Hope to catch some stragglers queued up behind our finalizable object
    System.runFinalization();
  }

  private static WeakReference<Object> createWeakReferenceWithFinalizer(
      CountDownLatch finalizerRan) {
    Object referent = new Object();

    assertThat(simplifyPath("./../../")).isEqualTo("../..");
    assertThat(simplifyPath("./.././../")).isEqualTo("../..");
  }

  /*
   * We co-opt some URI resolution tests for our purposes.
   * Some of the tests have queries and anchors that are a little silly here.
   */

  /** http://gbiv.com/protocols/uri/rfc/rfc2396.html#rfc.section.C.1 */
  public void testRfc2396Normal() {

      // but work beyond that must take at least one second
      assertThat(afterBurst).isAtLeast(1000);
    }
  }

  /**
   * This neat test shows that no matter what weights we use in our requests, if we push X amount of
   * permits in a cool state, where X = rate * timeToCoolDown, and we have specified a
   * timeToWarmUp() period, it will cost as the prescribed amount of time. E.g., calling