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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 io.opencensus.common.ToLongFunction;
import java.util.ArrayList;
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 DerivedLongGauge}. */
// TODO(mayurkale): Add more tests, once DerivedLongGauge plugs-in into the registry.
@RunWith(JUnit4.class)
public class DerivedLongGaugeTest {
@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 List<LabelValue> EMPTY_LABEL_VALUES = new ArrayList<LabelValue>();
private final DerivedLongGauge derivedLongGauge =
DerivedLongGauge.newNoopDerivedLongGauge(NAME, DESCRIPTION, UNIT, LABEL_KEY);
private static final ToLongFunction<Object> longFunction =
new ToLongFunction<Object>() {
@Override
public long applyAsLong(Object value) {
return 5;
}
};
@Test
public void noopCreateTimeSeries_WithNullLabelValues() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelValues");
derivedLongGauge.createTimeSeries(null, null, longFunction);
}
@Test
public void noopCreateTimeSeries_WithNullElement() {
List<LabelValue> labelValues = Collections.singletonList(null);
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelValue element should not be null.");
derivedLongGauge.createTimeSeries(labelValues, null, longFunction);
}
@Test
public void noopCreateTimeSeries_WithInvalidLabelSize() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("Incorrect number of labels.");
derivedLongGauge.createTimeSeries(EMPTY_LABEL_VALUES, null, longFunction);
}
@Test
public void createTimeSeries_WithNullFunction() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("function");
derivedLongGauge.createTimeSeries(LABEL_VALUES, null, null);
}
@Test
public void noopRemoveTimeSeries_WithNullLabelValues() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("labelValues");
derivedLongGauge.removeTimeSeries(null);
}
}
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