SignalFxEndpointMetricsHandlerTest.java 文件源码

@DataProvider(value = {
    "42     |   DAYS",
    "123    |   SECONDS",
    "999    |   MILLISECONDS",
    "3      |   HOURS"
}, splitBy = "\\|")
@Test
public void RollingWindowTimerBuilder_newMetric_creates_new_timer_with_SlidingTimeWindowReservoir_with_expected_values(
    long amount, TimeUnit timeUnit
) {
    // given
    RollingWindowTimerBuilder rwtb = new RollingWindowTimerBuilder(amount, timeUnit);

    // when
    Timer timer = rwtb.newMetric();

    // then
    Histogram histogram = (Histogram) getInternalState(timer, "histogram");
    Reservoir reservoir = (Reservoir) getInternalState(histogram, "reservoir");
    assertThat(reservoir).isInstanceOf(SlidingTimeWindowReservoir.class);
    // The expected value here comes from logic in the SlidingTimeWindowReservoir constructor.
    assertThat(getInternalState(reservoir, "window")).isEqualTo(timeUnit.toNanos(amount) * 256);
}