    @Test
    public void test_computeMillisToReachTarget() {

        Long time = Confetto.computeMillisToReachTarget(null, 0f, 0f);
        assertNull(time);
        time = Confetto.computeMillisToReachTarget(0f, 10f, 10f);
        assertEquals(0, time.longValue());
        time = Confetto.computeMillisToReachTarget(20f, 10f, 10f);
        assertEquals(1, time.longValue());
        time = Confetto.computeMillisToReachTarget(30f, 0f, 10f);
        assertEquals(3, time.longValue());
        time = Confetto.computeMillisToReachTarget(20f, 10f, 0f);
        assertNull(time);
    }