} catch (NoSuchMethodException e) {
      assertThat(isAndroid() || isBeforeJava19()).isTrue();
      return; // close() doesn't exist, so we can't test it.
    }
    closeMethod.invoke(wrapper);
    assertThat(delegate.isTerminated()).isTrue();
  }

  private static boolean isAndroid() {
    return System.getProperty("java.runtime.name", "").contains("Android");
  }

 * Android.
 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class AbstractFutureDefaultAtomicHelperTest extends TestCase {
  public void testUsingExpectedAtomicHelper() throws Exception {
    if (isAndroid()) {
      assertThat(AbstractFutureState.atomicHelperTypeForTest()).isEqualTo("UnsafeAtomicHelper");
    } else {
      assertThat(AbstractFutureState.atomicHelperTypeForTest())

 */
@NullUnmarked
@GwtIncompatible
@J2ktIncompatible
public class AbstractFutureDefaultAtomicHelperTest extends TestCase {
  public void testUsingExpectedAtomicHelper() throws Exception {
    if (isJava8() || isAndroid()) {
      assertThat(AbstractFutureState.atomicHelperTypeForTest()).isEqualTo("UnsafeAtomicHelper");
    } else {
      assertThat(AbstractFutureState.atomicHelperTypeForTest()).isEqualTo("VarHandleAtomicHelper");
    }
  }

    } catch (NoSuchMethodException e) {
      assertThat(isAndroid() || isBeforeJava19()).isTrue();
      return; // close() doesn't exist, so we can't test it.
    }
    closeMethod.invoke(wrapper);
    assertThat(delegate.isTerminated()).isTrue();
  }

  private static boolean isAndroid() {
    return System.getProperty("java.runtime.name", "").contains("Android");
  }

      file = out.getFile();
      assertEquals(dataSize, file.length());
      assertTrue(file.exists());
      assertThat(file.getName()).contains("FileBackedOutputStream");
      if (!isAndroid() && !isWindows()) {
        PosixFileAttributes attributes =
            java.nio.file.Files.getFileAttributeView(file.toPath(), PosixFileAttributeView.class)
                .readAttributes();

    } catch (NoSuchMethodException e) {
      throw new AssertionError(e);
    }
  }

  private static @Nullable Field getInheritableThreadLocalsField() {
    if (isAndroid()) {
      /*
       * We need not worry about class unloading under Android. Plus, this approach doesn't always
       * work under Android.
       *

    @VisibleForTesting static boolean disabled;

    @Override
    public @Nullable Class<?> loadFinalizer() {
      if (disabled) {
        return null;
      }
      if (isAndroid()) {
        // We need not worry about class unloading under Android. Plus, this approach wouldn't work.
        return null;
      }
      ClassLoader systemLoader;
      try {

    } catch (NoSuchMethodException e) {
      throw new AssertionError(e);
    }
  }

  private static @Nullable Field getInheritableThreadLocalsField() {
    if (isAndroid()) {
      /*
       * We need not worry about class unloading under Android. Plus, this approach doesn't always
       * work under Android.
       *

    @VisibleForTesting static boolean disabled;

    @Override
    public @Nullable Class<?> loadFinalizer() {
      if (disabled) {
        return null;
      }
      if (isAndroid()) {
        // We need not worry about class unloading under Android. Plus, this approach wouldn't work.
        return null;
      }
      ClassLoader systemLoader;
      try {

 *
 * @author Pete Gillin
 */
@NullUnmarked
@J2ktIncompatible
@GwtIncompatible
class StatsTesting {
  // TODO(cpovirk): Convince myself that this larger error makes sense.
  static final double ALLOWED_ERROR = isAndroid() ? .25 : 1e-10;

  // Inputs and their statistics:

  static final double ONE_VALUE = 12.34;

  static final double OTHER_ONE_VALUE = -56.78;