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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.metrics;
import static com.google.common.truth.Truth.assertThat;
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 MetricRegistry}. */
@RunWith(JUnit4.class)
public class MetricRegistryTest {
@Rule public ExpectedException thrown = ExpectedException.none();
private static final String NAME = "name";
private static final String NAME_2 = "name2";
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 final MetricRegistry metricRegistry =
MetricsComponent.newNoopMetricsComponent().getMetricRegistry();
@Test
public void noopAddLongGauge_NullName() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("name");
metricRegistry.addLongGauge(null, DESCRIPTION, UNIT, LABEL_KEY);
}
@Test
public void noopAddLongGauge_NullDescription() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("description");
metricRegistry.addLongGauge(NAME, null, UNIT, LABEL_KEY);
}
@Test
public void noopAddLongGauge_NullUnit() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("unit");
metricRegistry.addLongGauge(NAME, DESCRIPTION, null, LABEL_KEY);
}
@Test
public void noopAddLongGauge_NullLabels() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelKeys");
metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, null);
}
@Test
public void noopAddLongGauge_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 noopAddDoubleGauge_NullName() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("name");
metricRegistry.addDoubleGauge(null, DESCRIPTION, UNIT, LABEL_KEY);
}
@Test
public void noopAddDoubleGauge_NullDescription() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("description");
metricRegistry.addDoubleGauge(NAME_2, null, UNIT, LABEL_KEY);
}
@Test
public void noopAddDoubleGauge_NullUnit() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("unit");
metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, null, LABEL_KEY);
}
@Test
public void noopAddDoubleGauge_NullLabels() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelKeys");
metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, null);
}
@Test
public void noopAddDoubleGauge_WithNullElement() {
List<LabelKey> labelKeys = Collections.singletonList(null);
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelKey element should not be null.");
metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, labelKeys);
}
@Test
public void noopSameAs() {
LongGauge longGauge = metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY);
assertThat(longGauge.getDefaultTimeSeries()).isSameAs(longGauge.getDefaultTimeSeries());
assertThat(longGauge.getDefaultTimeSeries())
.isSameAs(longGauge.getOrCreateTimeSeries(LABEL_VALUES));
DoubleGauge doubleGauge = metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, LABEL_KEY);
assertThat(doubleGauge.getDefaultTimeSeries()).isSameAs(doubleGauge.getDefaultTimeSeries());
assertThat(doubleGauge.getDefaultTimeSeries())
.isSameAs(doubleGauge.getOrCreateTimeSeries(LABEL_VALUES));
}
@Test
public void noopInstanceOf() {
assertThat(metricRegistry.addLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY))
.isInstanceOf(LongGauge.newNoopLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY).getClass());
assertThat(metricRegistry.addDoubleGauge(NAME_2, DESCRIPTION, UNIT, LABEL_KEY))
.isInstanceOf(
DoubleGauge.newNoopDoubleGauge(NAME_2, DESCRIPTION, UNIT, LABEL_KEY).getClass());
}
}
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