@Test
public void testFormat() {

    assertEquals(
            SpeedFormatterUtil.format(METERS_PER_SECOND_SPEED, UnitSystem.METRIC),
            (int) KILOMETERS_PER_HOUR_SPEED);
    assertEquals(
            SpeedFormatterUtil.format(METERS_PER_SECOND_SPEED, UnitSystem.IMPERIAL_UK),
            (int) MILES_PER_HOUR_SPEED);
    assertEquals(
            SpeedFormatterUtil.format(METERS_PER_SECOND_SPEED, UnitSystem.IMPERIAL_US),
            (int) MILES_PER_HOUR_SPEED);
}