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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.metrics;
import static com.google.common.truth.Truth.assertThat;
import io.opencensus.common.Timestamp;
import io.opencensus.common.ToDoubleFunction;
import io.opencensus.metrics.LabelKey;
import io.opencensus.metrics.LabelValue;
import io.opencensus.metrics.export.Metric;
import io.opencensus.metrics.export.MetricDescriptor;
import io.opencensus.metrics.export.MetricDescriptor.Type;
import io.opencensus.metrics.export.Point;
import io.opencensus.metrics.export.TimeSeries;
import io.opencensus.metrics.export.Value;
import io.opencensus.testing.common.TestClock;
import java.util.ArrayList;
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;
/** Unit tests for {@link DerivedDoubleGaugeImpl}. */
@RunWith(JUnit4.class)
public class DerivedDoubleGaugeImplTest {
@Rule public ExpectedException thrown = ExpectedException.none();
private static final String METRIC_NAME = "name";
private static final String METRIC_DESCRIPTION = "description";
private static final String METRIC_UNIT = "1";
private static final List<LabelKey> LABEL_KEY =
Collections.singletonList(LabelKey.create("key", "key description"));
private static final List<LabelValue> LABEL_VALUES =
Collections.singletonList(LabelValue.create("value"));
private static final List<LabelValue> LABEL_VALUES_1 =
Collections.singletonList(LabelValue.create("value1"));
private static final Timestamp TEST_TIME = Timestamp.create(1234, 123);
private final TestClock testClock = TestClock.create(TEST_TIME);
private static final MetricDescriptor METRIC_DESCRIPTOR =
MetricDescriptor.create(
METRIC_NAME, METRIC_DESCRIPTION, METRIC_UNIT, Type.GAUGE_DOUBLE, LABEL_KEY);
private final DerivedDoubleGaugeImpl derivedDoubleGauge =
new DerivedDoubleGaugeImpl(METRIC_NAME, METRIC_DESCRIPTION, METRIC_UNIT, LABEL_KEY);
// helper class
public static class QueueManager {
public double size() {
return 2.5;
}
}
private static final ToDoubleFunction<Object> doubleFunction =
new ToDoubleFunction<Object>() {
@Override
public double applyAsDouble(Object value) {
return 5.5;
}
};
private static final ToDoubleFunction<Object> negativeDoubleFunction =
new ToDoubleFunction<Object>() {
@Override
public double applyAsDouble(Object value) {
return -200.5;
}
};
private static final ToDoubleFunction<QueueManager> queueManagerFunction =
new ToDoubleFunction<QueueManager>() {
@Override
public double applyAsDouble(QueueManager queue) {
return queue.size();
}
};
@Test
public void createTimeSeries_WithNullLabelValues() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelValues");
derivedDoubleGauge.createTimeSeries(null, null, doubleFunction);
}
@Test
public void createTimeSeries_WithNullElement() {
List<LabelKey> labelKeys =
Arrays.asList(LabelKey.create("key1", "desc"), LabelKey.create("key2", "desc"));
List<LabelValue> labelValues = Arrays.asList(LabelValue.create("value1"), null);
DerivedDoubleGaugeImpl derivedDoubleGauge =
new DerivedDoubleGaugeImpl(METRIC_NAME, METRIC_DESCRIPTION, METRIC_UNIT, labelKeys);
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelValue element should not be null.");
derivedDoubleGauge.createTimeSeries(labelValues, null, doubleFunction);
}
@Test
public void createTimeSeries_WithInvalidLabelSize() {
List<LabelValue> labelValues =
Arrays.asList(LabelValue.create("value1"), LabelValue.create("value2"));
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("Incorrect number of labels.");
derivedDoubleGauge.createTimeSeries(labelValues, null, doubleFunction);
}
@Test
public void createTimeSeries_WithNullFunction() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("function");
derivedDoubleGauge.createTimeSeries(LABEL_VALUES, null, null);
}
@Test
public void createTimeSeries_WithObjFunction() {
derivedDoubleGauge.createTimeSeries(LABEL_VALUES, new QueueManager(), queueManagerFunction);
Metric metric = derivedDoubleGauge.getMetric(testClock);
assertThat(metric).isNotNull();
assertThat(metric)
.isEqualTo(
Metric.createWithOneTimeSeries(
METRIC_DESCRIPTOR,
TimeSeries.createWithOnePoint(
LABEL_VALUES, Point.create(Value.doubleValue(2.5), TEST_TIME), null)));
}
@Test
public void createTimeSeries_WithSameLabel() {
derivedDoubleGauge.createTimeSeries(LABEL_VALUES, new QueueManager(), queueManagerFunction);
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("A different time series with the same labels already exists.");
derivedDoubleGauge.createTimeSeries(LABEL_VALUES, null, queueManagerFunction);
}
@Test
public void addTimeSeries_WithNullObj() {
derivedDoubleGauge.createTimeSeries(LABEL_VALUES, null, negativeDoubleFunction);
Metric metric = derivedDoubleGauge.getMetric(testClock);
assertThat(metric).isNotNull();
assertThat(metric)
.isEqualTo(
Metric.createWithOneTimeSeries(
METRIC_DESCRIPTOR,
TimeSeries.createWithOnePoint(
LABEL_VALUES, Point.create(Value.doubleValue(-200.5), TEST_TIME), null)));
}
@Test
public void removeTimeSeries() {
derivedDoubleGauge.createTimeSeries(LABEL_VALUES, null, doubleFunction);
Metric metric = derivedDoubleGauge.getMetric(testClock);
assertThat(metric).isNotNull();
assertThat(metric.getMetricDescriptor()).isEqualTo(METRIC_DESCRIPTOR);
assertThat(metric.getTimeSeriesList().size()).isEqualTo(1);
derivedDoubleGauge.removeTimeSeries(LABEL_VALUES);
assertThat(derivedDoubleGauge.getMetric(testClock)).isNull();
}
@Test
public void removeTimeSeries_WithNullLabelValues() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelValues");
derivedDoubleGauge.removeTimeSeries(null);
}
@Test
public void multipleMetrics_GetMetric() {
derivedDoubleGauge.createTimeSeries(LABEL_VALUES, null, doubleFunction);
derivedDoubleGauge.createTimeSeries(LABEL_VALUES_1, new QueueManager(), queueManagerFunction);
List<TimeSeries> expectedTimeSeriesList = new ArrayList<TimeSeries>();
expectedTimeSeriesList.add(
TimeSeries.createWithOnePoint(
LABEL_VALUES, Point.create(Value.doubleValue(5.5), TEST_TIME), null));
expectedTimeSeriesList.add(
TimeSeries.createWithOnePoint(
LABEL_VALUES_1, Point.create(Value.doubleValue(2.5), TEST_TIME), null));
Metric metric = derivedDoubleGauge.getMetric(testClock);
assertThat(metric).isNotNull();
assertThat(metric.getMetricDescriptor()).isEqualTo(METRIC_DESCRIPTOR);
assertThat(metric.getTimeSeriesList().size()).isEqualTo(2);
assertThat(metric.getTimeSeriesList()).containsExactlyElementsIn(expectedTimeSeriesList);
assertThat(metric.getTimeSeriesList().get(0).getLabelValues().size()).isEqualTo(1);
assertThat(metric.getTimeSeriesList().get(0).getLabelValues().get(0))
.isEqualTo(LabelValue.create("value"));
assertThat(metric.getTimeSeriesList().get(1).getLabelValues().size()).isEqualTo(1);
assertThat(metric.getTimeSeriesList().get(1).getLabelValues().get(0))
.isEqualTo(LabelValue.create("value1"));
}
@Test
public void clear() {
derivedDoubleGauge.createTimeSeries(LABEL_VALUES, null, doubleFunction);
derivedDoubleGauge.createTimeSeries(LABEL_VALUES_1, new QueueManager(), queueManagerFunction);
Metric metric = derivedDoubleGauge.getMetric(testClock);
assertThat(metric).isNotNull();
assertThat(metric.getMetricDescriptor()).isEqualTo(METRIC_DESCRIPTOR);
assertThat(metric.getTimeSeriesList().size()).isEqualTo(2);
derivedDoubleGauge.clear();
assertThat(derivedDoubleGauge.getMetric(testClock)).isNull();
}
@Test
public void empty_GetMetrics() {
assertThat(derivedDoubleGauge.getMetric(testClock)).isNull();
}
}
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