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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.Summary.Snapshot;
import io.opencensus.metrics.Summary.Snapshot.ValueAtPercentile;
import java.util.Collections;
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 Summary}. */
@RunWith(JUnit4.class)
public class SummaryTest {
@Rule public final ExpectedException thrown = ExpectedException.none();
private static final double TOLERANCE = 1e-6;
@Test
public void createAndGet_ValueAtPercentile() {
ValueAtPercentile valueAtPercentile = ValueAtPercentile.create(99.5, 10.2);
assertThat(valueAtPercentile.getPercentile()).isWithin(TOLERANCE).of(99.5);
assertThat(valueAtPercentile.getValue()).isWithin(TOLERANCE).of(10.2);
}
@Test
public void createValueAtPercentile_InvalidValueAtPercentileInterval() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("percentile must be in the interval (0.0, 100.0]");
ValueAtPercentile.create(100.1, 10.2);
}
@Test
public void createValueAtPercentile_NegativeValue() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("value must be non-negative");
ValueAtPercentile.create(99.5, -10.2);
}
@Test
public void createAndGet_Snapshot() {
Snapshot snapshot =
Snapshot.create(
10L, 87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)));
assertThat(snapshot.getCount()).isEqualTo(10);
assertThat(snapshot.getSum()).isWithin(TOLERANCE).of(87.07);
assertThat(snapshot.getValueAtPercentiles())
.containsExactly(ValueAtPercentile.create(99.5, 10.2));
}
@Test
public void createAndGet_Snapshot_WithNullCountAndSum() {
Snapshot snapshot =
Snapshot.create(
null, null, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)));
assertThat(snapshot.getCount()).isNull();
assertThat(snapshot.getSum()).isNull();
assertThat(snapshot.getValueAtPercentiles())
.containsExactly(ValueAtPercentile.create(99.5, 10.2));
}
@Test
public void createSnapshot_NegativeCount() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("count must be non-negative");
Snapshot.create(-10L, 87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)));
}
@Test
public void createSnapshot_NegativeSum() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("sum must be non-negative");
Snapshot.create(10L, -87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)));
}
@Test
public void createSnapshot_ZeroCountAndNonZeroSum() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("sum must be 0 if count is 0");
Snapshot.create(0L, 87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)));
}
@Test
public void createSnapshot_NullValueAtPercentilesList() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("valueAtPercentiles");
Snapshot.create(10L, 87.07, null);
}
@Test
public void createSnapshot_OneNullValueAtPercentile() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("value in valueAtPercentiles");
Snapshot.create(10L, 87.07, Collections.<ValueAtPercentile>singletonList(null));
}
@Test
public void createAndGet_Summary() {
Snapshot snapshot =
Snapshot.create(
10L, 87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)));
Summary summary = Summary.create(10L, 6.6, snapshot);
assertThat(summary.getCount()).isEqualTo(10);
assertThat(summary.getSum()).isWithin(TOLERANCE).of(6.6);
assertThat(summary.getSnapshot()).isEqualTo(snapshot);
}
@Test
public void createSummary_NegativeCount() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("count must be non-negative");
Summary.create(
-10L, 6.6, Snapshot.create(null, null, Collections.<ValueAtPercentile>emptyList()));
}
@Test
public void createSummary_NegativeSum() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("sum must be non-negative");
Summary.create(
10L, -6.6, Snapshot.create(null, null, Collections.<ValueAtPercentile>emptyList()));
}
@Test
public void createSummary_ZeroCountAndNonZeroSum() {
thrown.expect(IllegalArgumentException.class);
thrown.expectMessage("sum must be 0 if count is 0");
Summary.create(
0L, 6.6, Snapshot.create(null, null, Collections.<ValueAtPercentile>emptyList()));
}
@Test
public void createSummary_NullSnapshot() {
thrown.expect(NullPointerException.class);
thrown.expectMessage("snapshot");
Summary.create(10L, 6.6, null);
}
@Test
public void testEquals() {
new EqualsTester()
.addEqualityGroup(
Summary.create(
10L,
10.0,
Snapshot.create(
10L, 87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)))),
Summary.create(
10L,
10.0,
Snapshot.create(
10L, 87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)))))
.addEqualityGroup(
Summary.create(
7L,
10.0,
Snapshot.create(
10L, 87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)))))
.addEqualityGroup(
Summary.create(
10L,
7.0,
Snapshot.create(
10L, 87.07, Collections.singletonList(ValueAtPercentile.create(99.5, 10.2)))))
.addEqualityGroup(
Summary.create(
10L, 10.0, Snapshot.create(null, null, Collections.<ValueAtPercentile>emptyList())))
.testEquals();
}
}
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