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/*
* Copyright 2018, 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.Timestamp;
import io.opencensus.implcore.stats.MutableAggregation.MutableLastValue;
import io.opencensus.metrics.LabelKey;
import io.opencensus.metrics.LabelValue;
import io.opencensus.metrics.Metric;
import io.opencensus.metrics.MetricDescriptor;
import io.opencensus.metrics.MetricDescriptor.Type;
import io.opencensus.metrics.Point;
import io.opencensus.metrics.TimeSeriesGauge;
import io.opencensus.metrics.TimeSeriesList.TimeSeriesGaugeList;
import io.opencensus.metrics.Value;
import io.opencensus.tags.TagValue;
import java.util.Arrays;
import java.util.Collections;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests for {@link MetricMap}. */
@RunWith(JUnit4.class)
public class MetricMapTest {
private static final TagValue VALUE = TagValue.create("VALUE");
private static final TagValue VALUE_2 = TagValue.create("VALUE_2");
private static final TagValue VALUE_3 = TagValue.create("VALUE_3");
private static final Timestamp TIMESTAMP_EMPTY = Timestamp.create(0, 0);
private static final LabelKey LABEL_KEY = LabelKey.create("KEY", "");
private static final LabelValue LABEL_VALUE = LabelValue.create("VALUE");
private static final LabelValue LABEL_VALUE_2 = LabelValue.create("VALUE_2");
private static final LabelValue LABEL_VALUE_3 = LabelValue.create("VALUE_3");
private static final MetricDescriptor DESCRIPTOR =
MetricDescriptor.create(
"name", "description", "1", Type.GAUGE_DOUBLE, Collections.singletonList(LABEL_KEY));
@Test
public void noDataForMetricDescriptor() {
MetricMap metricMap = new MetricMap();
metricMap.registerMetricDescriptor(DESCRIPTOR, TIMESTAMP_EMPTY);
assertThat(metricMap.toMetrics()).isEmpty();
}
@Test
public void recordAndExport() {
MetricMap metricMap = new MetricMap();
Timestamp timestamp1 = Timestamp.fromMillis(1000);
Timestamp timestamp2 = Timestamp.fromMillis(2000);
Timestamp timestamp3 = Timestamp.fromMillis(3000);
Timestamp timestamp4 = Timestamp.fromMillis(4000);
metricMap.registerMetricDescriptor(DESCRIPTOR, timestamp1);
MutableLastValue lastValue1 = MutableLastValue.create();
lastValue1.add(10.0, Collections.<String, String>emptyMap(), timestamp2);
metricMap.record(DESCRIPTOR, Collections.singletonList(VALUE), lastValue1, timestamp2);
lastValue1.add(19.0, Collections.<String, String>emptyMap(), timestamp3);
metricMap.record(DESCRIPTOR, Collections.singletonList(VALUE), lastValue1, timestamp3);
MutableLastValue lastValue2 = MutableLastValue.create();
lastValue2.add(-7.0, Collections.<String, String>emptyMap(), timestamp3);
metricMap.record(DESCRIPTOR, Collections.singletonList(VALUE_2), lastValue2, timestamp3);
TimeSeriesGauge expectedTimeSeries1 =
TimeSeriesGauge.create(
Collections.singletonList(LABEL_VALUE),
Arrays.asList(
Point.create(Value.doubleValue(10.0), timestamp2),
Point.create(Value.doubleValue(19.0), timestamp3)));
TimeSeriesGauge expectedTimeSeries2 =
TimeSeriesGauge.create(
Collections.singletonList(LABEL_VALUE_2),
Collections.singletonList(Point.create(Value.doubleValue(-7.0), timestamp3)));
assertThat(metricMap.toMetrics())
.containsExactly(
Metric.create(
DESCRIPTOR,
TimeSeriesGaugeList.create(
Arrays.asList(expectedTimeSeries1, expectedTimeSeries2))));
assertThat(metricMap.toMetrics()).isEmpty(); // Flush stats after exporting.
// Record another Measurement, should only produce one Point.
lastValue1.add(6.0, Collections.<String, String>emptyMap(), timestamp4);
metricMap.record(DESCRIPTOR, Collections.singletonList(VALUE_3), lastValue1, timestamp4);
assertThat(metricMap.toMetrics())
.containsExactly(
Metric.create(
DESCRIPTOR,
TimeSeriesGaugeList.create(
Collections.singletonList(
TimeSeriesGauge.create(
Collections.singletonList(LABEL_VALUE_3),
Collections.singletonList(
Point.create(Value.doubleValue(6.0), timestamp4)))))));
}
}
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