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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.metrics.LabelKey;
import io.opencensus.metrics.LabelValue;
import io.opencensus.metrics.LongGauge;
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.Collection;
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 MetricRegistryImpl}. */
@RunWith(JUnit4.class)
public class MetricRegistryImplTest {
@Rule public ExpectedException thrown = ExpectedException.none();
private static final String NAME = "name";
private static final String DESCRIPTION = "description";
private static final String 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 Timestamp TEST_TIME = Timestamp.create(1234, 123);
private final TestClock testClock = TestClock.create(TEST_TIME);
private final MetricRegistryImpl metricRegistry = new MetricRegistryImpl(testClock);
private static final MetricDescriptor METRIC_DESCRIPTOR =
MetricDescriptor.create(NAME, DESCRIPTION, UNIT, Type.GAUGE_INT64, LABEL_KEY);
@Test
public void addLongGauge_NullName() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("name");
metricRegistry.addLongGauge(null, DESCRIPTION, UNIT, LABEL_KEY);
}
@Test
public void addLongGauge_NullDescription() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("description");
metricRegistry.addLongGauge(NAME, null, UNIT, LABEL_KEY);
}
@Test
public void addLongGauge_NullUnit() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("unit");
metricRegistry.addLongGauge(NAME, DESCRIPTION, null, LABEL_KEY);
}
@Test
public void addLongGauge_NullLabels() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelKeys");
metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, null);
}
@Test
public void addLongGauge_WithNullElement() {
List<LabelKey> labelKeys = Collections.singletonList(null);
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelKey element should not be null.");
metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, labelKeys);
}
@Test
public void addLongGauge_GetMetrics() {
LongGauge longGauge = metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY);
longGauge.getOrCreateTimeSeries(LABEL_VALUES);
Collection<Metric> metricCollections = metricRegistry.getMetricProducer().getMetrics();
assertThat(metricCollections.size()).isEqualTo(1);
assertThat(metricCollections)
.containsExactly(
Metric.createWithOneTimeSeries(
METRIC_DESCRIPTOR,
TimeSeries.createWithOnePoint(
LABEL_VALUES, Point.create(Value.longValue(0), TEST_TIME), null)));
}
@Test
public void empty_GetMetrics() {
assertThat(metricRegistry.getMetricProducer().getMetrics()).isEmpty();
}
@Test
public void checkInstanceOf() {
LongGauge longGauge = metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY);
assertThat(longGauge).isInstanceOf(LongGaugeImpl.class);
}
}
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