@Test
public void testUpdateCurrentRateShouldUpdateRate() {
double newRate = new Random().nextDouble();
hourlyRate.updateCurrentRate(newRate);
assertEquals(newRate, hourlyRate.currentRate(), DELTA_VALUE);
}
@Test
public void testCurrentRateShouldReturnDefaultRate() {
assertEquals(DEFAULT_RATE, hourlyRate.currentRate(), DELTA_VALUE);
}