} catch (TimeoutException success) {
    } catch (Exception e) {
      threadUnexpectedException(e);
    } finally {
      future.cancel(true);
    }
    assertThat(millisElapsedSince(startTime)).isAtLeast(timeoutMillis);
  }

  /** The number of elements to place in collections, arrays, etc. */
  public static final int SIZE = 20;

  // Some convenient Integer constants