testAccelerometerCanRespondToFailureWhenReportingAcceleration() {
  accelerometer = Accelerometer.new()
  accelerometer.add_observer(observer = mock(AccelerationObserver))
  observer.stubs().handle_acceleration_report().to_raise(AnyException)

  this_block {
    accelerometer.report_acceleration(-50.ms2)
  }.should raise(AnyException)
}