@Test
public void should_combine_accuracy() {

	// Given
	AccuracyState<Boolean> first = new AccuracyState<Boolean>(10, 3);
	AccuracyState<Boolean> second = new AccuracyState<Boolean>(15, 13);
	// When
	AccuracyState<Boolean> combined = agrgegator.combine(first, second);
	// Then
	assertThat(combined).isEqualTo(new AccuracyState<Boolean>(25, 16));
}