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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.common.Function;
import io.opencensus.common.Functions;
import io.opencensus.metrics.Distribution.Bucket;
import io.opencensus.metrics.Value.ValueDistribution;
import io.opencensus.metrics.Value.ValueDouble;
import io.opencensus.metrics.Value.ValueLong;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Unit tests for {@link Value}. */
@RunWith(JUnit4.class)
public class ValueTest {
private static final Distribution DISTRIBUTION =
Distribution.create(
10,
10,
1,
Arrays.asList(-5.0, 0.0, 5.0),
Arrays.asList(Bucket.create(3), Bucket.create(1), Bucket.create(2), Bucket.create(4)));
@Test
public void createAndGet_ValueDouble() {
Value value = Value.doubleValue(-34.56);
assertThat(value).isInstanceOf(ValueDouble.class);
assertThat(((ValueDouble) value).getValue()).isEqualTo(-34.56);
}
@Test
public void createAndGet_ValueLong() {
Value value = Value.longValue(123456789);
assertThat(value).isInstanceOf(ValueLong.class);
assertThat(((ValueLong) value).getValue()).isEqualTo(123456789);
}
@Test
public void createAndGet_ValueDistribution() {
Value value = Value.distributionValue(DISTRIBUTION);
assertThat(value).isInstanceOf(ValueDistribution.class);
assertThat(((ValueDistribution) value).getValue()).isEqualTo(DISTRIBUTION);
}
@Test
public void testEquals() {
new EqualsTester()
.addEqualityGroup(Value.doubleValue(1.0), Value.doubleValue(1.0))
.addEqualityGroup(Value.doubleValue(2.0))
.addEqualityGroup(Value.longValue(1L))
.addEqualityGroup(Value.longValue(2L))
.addEqualityGroup(
Value.distributionValue(
Distribution.create(
-7,
10,
23.456,
Arrays.asList(-5.0, 0.0, 5.0),
Arrays.asList(
Bucket.create(3), Bucket.create(1), Bucket.create(2), Bucket.create(4)))))
.testEquals();
}
@Test
public void testMatch() {
List<Value> values =
Arrays.asList(
ValueDouble.create(1.0), ValueLong.create(-1), ValueDistribution.create(DISTRIBUTION));
List<Number> expected =
Arrays.<Number>asList(1.0, -1L, 10.0, 10L, 1.0, -5.0, 0.0, 5.0, 3L, 1L, 2L, 4L);
final List<Number> actual = new ArrayList<Number>();
for (Value value : values) {
value.match(
new Function<Double, Object>() {
@Override
public Object apply(Double arg) {
actual.add(arg);
return null;
}
},
new Function<Long, Object>() {
@Override
public Object apply(Long arg) {
actual.add(arg);
return null;
}
},
new Function<Distribution, Object>() {
@Override
public Object apply(Distribution arg) {
actual.add(arg.getMean());
actual.add(arg.getCount());
actual.add(arg.getSumOfSquaredDeviations());
actual.addAll(arg.getBucketBoundaries());
for (Bucket bucket : arg.getBuckets()) {
actual.add(bucket.getCount());
}
return null;
}
},
Functions.throwAssertionError());
}
assertThat(actual).containsExactlyElementsIn(expected).inOrder();
}
}
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