assertThat(DoubleMath.mean(11)).isWithin(1.0e-10).of(11.0);
  }

  @GwtIncompatible // DoubleMath.mean
  @SuppressWarnings("deprecation") // test of deprecated method
  public void testMean_longVarargs() {
    assertThat(DoubleMath.mean(11L, -22L, 44L, -88L)).isWithin(1.0e-10).of(-13.75);
    assertThat(DoubleMath.mean(11L)).isWithin(1.0e-10).of(11.0);
  }

  @GwtIncompatible // DoubleMath.mean