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/*
* Copyright 2017, OpenCensus Authors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.opencensus.implcore.stats;
import static com.google.common.truth.Truth.assertThat;
import io.opencensus.common.Duration;
import io.opencensus.common.Timestamp;
import io.opencensus.implcore.stats.MutableAggregation.MutableMean;
import io.opencensus.stats.Aggregation.Mean;
import io.opencensus.tags.TagValue;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link IntervalBucket}. */
@RunWith(JUnit4.class)
public class IntervalBucketTest {
@Rule public final ExpectedException thrown = ExpectedException.none();
private static final double TOLERANCE = 1e-6;
private static final Duration MINUTE = Duration.create(60, 0);
private static final Duration NEGATIVE_TEN_SEC = Duration.create(-10, 0);
private static final Timestamp START = Timestamp.create(60, 0);
private static final Mean MEAN = Mean.create();
@Test
public void preventNullStartTime() {
thrown.expect(NullPointerException.class);
new IntervalBucket(null, MINUTE, MEAN);
}
@Test
public void preventNullDuration() {
thrown.expect(NullPointerException.class);
new IntervalBucket(START, null, MEAN);
}
@Test
public void preventNegativeDuration() {
thrown.expect(IllegalArgumentException.class);
new IntervalBucket(START, NEGATIVE_TEN_SEC, MEAN);
}
@Test
public void preventNullAggregationList() {
thrown.expect(NullPointerException.class);
new IntervalBucket(START, MINUTE, null);
}
@Test
public void testGetTagValueAggregationMap_empty() {
assertThat(new IntervalBucket(START, MINUTE, MEAN).getTagValueAggregationMap()).isEmpty();
}
@Test
public void testGetStart() {
assertThat(new IntervalBucket(START, MINUTE, MEAN).getStart()).isEqualTo(START);
}
@Test
public void testRecord() {
IntervalBucket bucket = new IntervalBucket(START, MINUTE, MEAN);
List<TagValue> tagValues1 = Arrays.<TagValue>asList(TagValue.create("VALUE1"));
List<TagValue> tagValues2 = Arrays.<TagValue>asList(TagValue.create("VALUE2"));
bucket.record(tagValues1, 5.0, Collections.<String, String>emptyMap(), START);
bucket.record(tagValues1, 15.0, Collections.<String, String>emptyMap(), START);
bucket.record(tagValues2, 10.0, Collections.<String, String>emptyMap(), START);
assertThat(bucket.getTagValueAggregationMap().keySet()).containsExactly(tagValues1, tagValues2);
MutableMean mutableMean1 = (MutableMean) bucket.getTagValueAggregationMap().get(tagValues1);
MutableMean mutableMean2 = (MutableMean) bucket.getTagValueAggregationMap().get(tagValues2);
assertThat(mutableMean1.getSum()).isWithin(TOLERANCE).of(20);
assertThat(mutableMean2.getSum()).isWithin(TOLERANCE).of(10);
assertThat(mutableMean1.getCount()).isEqualTo(2);
assertThat(mutableMean2.getCount()).isEqualTo(1);
}
@Test
public void testGetFraction() {
Timestamp thirtySecondsAfterStart = Timestamp.create(90, 0);
assertThat(new IntervalBucket(START, MINUTE, MEAN).getFraction(thirtySecondsAfterStart))
.isWithin(TOLERANCE)
.of(0.5);
}
@Test
public void preventCallingGetFractionOnPastBuckets() {
IntervalBucket bucket = new IntervalBucket(START, MINUTE, MEAN);
Timestamp twoMinutesAfterStart = Timestamp.create(180, 0);
thrown.expect(IllegalArgumentException.class);
bucket.getFraction(twoMinutesAfterStart);
}
@Test
public void preventCallingGetFractionOnFutureBuckets() {
IntervalBucket bucket = new IntervalBucket(START, MINUTE, MEAN);
Timestamp thirtySecondsBeforeStart = Timestamp.create(30, 0);
thrown.expect(IllegalArgumentException.class);
bucket.getFraction(thirtySecondsBeforeStart);
}
}
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