@Test
public void testGetMeanFailuresLowRate() throws Exception {
assertEquals(1, history.getMean(), 0.01);
history
.failure(); // need an extra now that we can't determine the time between the first and
// previous
history.failure();
assertEquals(average(0), history.getMean(), 0.01);
history.failure();
assertEquals(average(0, 0), history.getMean(), 0.01);
history.success();
assertEquals(average(0, 0, 0.33), history.getMean(), 0.1);
}
@Test
@Ignore
public void testPerf() {
ExponentialMovingAverageRatio ratio = new ExponentialMovingAverageRatio(60, 10);
for (int i = 0; i < 100000; i++) {
if (i % 10 == 0) {
ratio.failure();
} else {
ratio.success();
}
}
}
@Test
public void testRatio() {
ExponentialMovingAverageRatio ratio = new ExponentialMovingAverageRatio(60, 10, true);
for (int i = 0; i < 100; i++) {
if (i % 10 == 1) {
ratio.failure();
} else {
ratio.success();
}
}
assertEquals(0.9, ratio.getMax(), 0.02);
assertEquals(0.9, ratio.getMean(), 0.03);
}
@Test
public void testReset() throws Exception {
assertEquals(0, history.getStandardDeviation(), 0.01);
history.success();
history.failure();
assertThat(history.getStandardDeviation(), not(equalTo(0)));
history.reset();
assertEquals(0, history.getStandardDeviation(), 0.01);
assertEquals(0, history.getCount());
assertEquals(0, history.getTimeSinceLastMeasurement(), 0.01);
assertEquals(1, history.getMean(), 0.01);
assertEquals(0, history.getMin(), 0.01);
assertEquals(0, history.getMax(), 0.01);
history.success();
assertEquals(1, history.getMin(), 0.01);
}
@Test
public void testDecayedMean() throws Exception {
history.failure(System.nanoTime() - 200000000);
assertEquals(average(0, Math.exp(-0.4)), history.getMean(), 0.01);
}
@Test
public void testGetEarlyFailure() throws Exception {
assertEquals(1, history.getMean(), 0.01);
history.failure();
assertEquals(0, history.getMean(), 0.01);
}
