@Test
public void shouldGetMinRateEvenWhenWindowHasMovedTwiceUnderIt() {
// Given
RateWindow rateWindow = createRateWindow(4);
long timestamp1 = getNowTimestamp(SAMPLE_RATE);
long timestamp2 = timestamp1 + SAMPLE_RATE;
long timestamp3 = timestamp2 + SAMPLE_RATE;
long timestamp4 = timestamp3 + (SAMPLE_RATE * 2);
given(timer.now()).willReturn(timestamp3 + 1);
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp2);
rateWindow.incrementForTimestamp(timestamp3);
rateWindow.incrementForTimestamp(timestamp3);
rateWindow.incrementForTimestamp(timestamp3);
rateWindow.getMinRate();
rateWindow.incrementForTimestamp(timestamp4);
// When
long rate = rateWindow.getMinRate();
// Then
assertEquals(rate, 0L);
}
@Test
public void shouldGetMinRateWhenNoRateSet() {
// Given
RateWindow rateWindow = createRateWindow(2);
// When
long rate = rateWindow.getMinRate();
// Then
assertEquals(rate, 0L);
}
@Test
public void shouldGetMinRateWhenTimeHasPassedCurrentIndex() {
// Given
RateWindow rateWindow = createRateWindow(3);
long timestamp1 = getNowTimestamp(SAMPLE_RATE);
long timestamp2 = timestamp1 + SAMPLE_RATE;
given(timer.now()).willReturn(timestamp2 + SAMPLE_RATE - 1);
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp2);
// When
long rate = rateWindow.getMinRate();
// Then
assertEquals(rate, 1L);
}
@Test
public void shouldGetMinRateWhenWindowMoves() {
// Given
RateWindow rateWindow = createRateWindow(2);
long timestamp1 = getNowTimestamp(SAMPLE_RATE);
long timestamp2 = timestamp1 + SAMPLE_RATE;
long timestamp3 = timestamp2 + SAMPLE_RATE;
rateWindow.incrementForTimestamp(timestamp1);
rateWindow.incrementForTimestamp(timestamp2);
rateWindow.incrementForTimestamp(timestamp2);
rateWindow.incrementForTimestamp(timestamp3);
rateWindow.incrementForTimestamp(timestamp3);
rateWindow.incrementForTimestamp(timestamp3);
// When
long rate = rateWindow.getMinRate();
// Then
assertEquals(rate, 2L);
}