    @Test
    public void givenAStartedFloatAnimation_whenWeReverseDirectionPastAPageBoundary_thenTheFractionValueIsCorrect() {

        numberAnimator.onPageScrolled(1, 0f, 0);
        numberAnimator.onPageScrolled(1, 0.1f, 10);

        numberAnimator.onPageScrolled(0, 0.9f, 90);

        assertThat(numberProperty.get()).isEqualTo(0.9f);
    }