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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 com.google.common.testing.EqualsTester;
import io.opencensus.metrics.MetricDescriptor.Type;
import java.util.Arrays;
import java.util.List;
import org.hamcrest.CoreMatchers;
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 MetricDescriptor}. */
@RunWith(JUnit4.class)
public class MetricDescriptorTest {
@Rule public final ExpectedException thrown = ExpectedException.none();
private static final String METRIC_NAME_1 = "metric1";
private static final String METRIC_NAME_2 = "metric2";
private static final String DESCRIPTION = "Metric description.";
private static final String UNIT = "kb/s";
private static final LabelKey KEY_1 = LabelKey.create("key1", "some key");
private static final LabelKey KEY_2 = LabelKey.create("key2", "some other key");
@Test
public void testGet() {
MetricDescriptor metricDescriptor =
MetricDescriptor.create(
METRIC_NAME_1, DESCRIPTION, UNIT, Type.GAUGE_DOUBLE, Arrays.asList(KEY_1, KEY_2));
assertThat(metricDescriptor.getName()).isEqualTo(METRIC_NAME_1);
assertThat(metricDescriptor.getDescription()).isEqualTo(DESCRIPTION);
assertThat(metricDescriptor.getUnit()).isEqualTo(UNIT);
assertThat(metricDescriptor.getType()).isEqualTo(Type.GAUGE_DOUBLE);
assertThat(metricDescriptor.getLabelKeys()).containsExactly(KEY_1, KEY_2).inOrder();
}
@Test
public void preventNullLabelKeyList() {
thrown.expect(NullPointerException.class);
thrown.expectMessage(CoreMatchers.equalTo("labelKeys"));
MetricDescriptor.create(METRIC_NAME_1, DESCRIPTION, UNIT, Type.GAUGE_DOUBLE, null);
}
@Test
public void preventNullLabelKey() {
List<LabelKey> keys = Arrays.asList(KEY_1, null);
thrown.expect(NullPointerException.class);
thrown.expectMessage(CoreMatchers.equalTo("labelKey"));
MetricDescriptor.create(METRIC_NAME_1, DESCRIPTION, UNIT, Type.GAUGE_DOUBLE, keys);
}
@Test
public void testEquals() {
new EqualsTester()
.addEqualityGroup(
MetricDescriptor.create(
METRIC_NAME_1, DESCRIPTION, UNIT, Type.GAUGE_DOUBLE, Arrays.asList(KEY_1, KEY_2)),
MetricDescriptor.create(
METRIC_NAME_1, DESCRIPTION, UNIT, Type.GAUGE_DOUBLE, Arrays.asList(KEY_1, KEY_2)))
.addEqualityGroup(
MetricDescriptor.create(
METRIC_NAME_2, DESCRIPTION, UNIT, Type.GAUGE_DOUBLE, Arrays.asList(KEY_1, KEY_2)))
.addEqualityGroup(
MetricDescriptor.create(
METRIC_NAME_2, DESCRIPTION, UNIT, Type.GAUGE_INT64, Arrays.asList(KEY_1, KEY_2)))
.addEqualityGroup(
MetricDescriptor.create(
METRIC_NAME_1,
DESCRIPTION,
UNIT,
Type.CUMULATIVE_DISTRIBUTION,
Arrays.asList(KEY_1, KEY_2)))
.addEqualityGroup(
MetricDescriptor.create(
METRIC_NAME_1,
DESCRIPTION,
UNIT,
Type.CUMULATIVE_DISTRIBUTION,
Arrays.asList(KEY_1)))
.testEquals();
}
}
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