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[Test] Add unit tests for HDR/TDigest PercentilesAggregators (#24245) 

Relates to #22278
This commit is contained in:
Tanguy Leroux 2017-05-02 10:55:45 +02:00 committed by GitHub
parent 9d8254fadf
commit ad3c042fc4
2 changed files with 299 additions and 0 deletions
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139
core/src/test/java/org/elasticsearch/search/aggregations/metrics/percentiles/hdr/HDRPercentilesAggregatorTests.java Normal file
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.search.aggregations.metrics.percentiles.hdr;
import org.apache.lucene.document.LongPoint;
import org.apache.lucene.document.NumericDocValuesField;
import org.apache.lucene.document.SortedNumericDocValuesField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.search.FieldValueQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
import org.elasticsearch.common.CheckedConsumer;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.index.mapper.NumberFieldMapper;
import org.elasticsearch.search.aggregations.AggregatorTestCase;
import org.elasticsearch.search.aggregations.metrics.percentiles.PercentilesAggregationBuilder;
import org.elasticsearch.search.aggregations.metrics.percentiles.PercentilesMethod;
import java.io.IOException;
import java.util.function.Consumer;
import static java.util.Arrays.asList;
import static java.util.Collections.singleton;
public class HDRPercentilesAggregatorTests extends AggregatorTestCase {
public void testNoDocs() throws IOException {
testCase(new MatchAllDocsQuery(), iw -> {
// Intentionally not writing any docs
}, hdr -> {
assertEquals(0L, hdr.state.getTotalCount());
});
}
public void testNoMatchingField() throws IOException {
testCase(new MatchAllDocsQuery(), iw -> {
iw.addDocument(singleton(new SortedNumericDocValuesField("wrong_number", 7)));
iw.addDocument(singleton(new SortedNumericDocValuesField("wrong_number", 1)));
}, hdr -> {
assertEquals(0L, hdr.state.getTotalCount());
});
}
public void testSomeMatchesSortedNumericDocValues() throws IOException {
testCase(new FieldValueQuery("number"), iw -> {
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 60)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 40)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 20)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 10)));
}, hdr -> {
assertEquals(4L, hdr.state.getTotalCount());
double approximation = 0.05d;
assertEquals(10.0d, hdr.percentile(25), approximation);
assertEquals(20.0d, hdr.percentile(50), approximation);
assertEquals(40.0d, hdr.percentile(75), approximation);
assertEquals(60.0d, hdr.percentile(99), approximation);
});
}
public void testSomeMatchesNumericDocValues() throws IOException {
testCase(new FieldValueQuery("number"), iw -> {
iw.addDocument(singleton(new NumericDocValuesField("number", 60)));
iw.addDocument(singleton(new NumericDocValuesField("number", 40)));
iw.addDocument(singleton(new NumericDocValuesField("number", 20)));
iw.addDocument(singleton(new NumericDocValuesField("number", 10)));
}, hdr -> {
assertEquals(4L, hdr.state.getTotalCount());
double approximation = 0.05d;
assertEquals(10.0d, hdr.percentile(25), approximation);
assertEquals(20.0d, hdr.percentile(50), approximation);
assertEquals(40.0d, hdr.percentile(75), approximation);
assertEquals(60.0d, hdr.percentile(99), approximation);
});
}
public void testQueryFiltering() throws IOException {
final CheckedConsumer<RandomIndexWriter, IOException> docs = iw -> {
iw.addDocument(asList(new LongPoint("row", 4), new SortedNumericDocValuesField("number", 60)));
iw.addDocument(asList(new LongPoint("row", 3), new SortedNumericDocValuesField("number", 40)));
iw.addDocument(asList(new LongPoint("row", 2), new SortedNumericDocValuesField("number", 20)));
iw.addDocument(asList(new LongPoint("row", 1), new SortedNumericDocValuesField("number", 10)));
};
testCase(LongPoint.newRangeQuery("row", 0, 2), docs, hdr -> {
assertEquals(2L, hdr.state.getTotalCount());
assertEquals(10.0d, hdr.percentile(randomDoubleBetween(1, 50, true)), 0.05d);
});
testCase(LongPoint.newRangeQuery("row", 5, 10), docs, hdr -> {
assertEquals(0L, hdr.state.getTotalCount());
});
}
private void testCase(Query query, CheckedConsumer<RandomIndexWriter, IOException> buildIndex,
Consumer<InternalHDRPercentiles> verify) throws IOException {
try (Directory directory = newDirectory()) {
try (RandomIndexWriter indexWriter = new RandomIndexWriter(random(), directory)) {
buildIndex.accept(indexWriter);
}
try (IndexReader indexReader = DirectoryReader.open(directory)) {
IndexSearcher indexSearcher = newSearcher(indexReader, true, true);
PercentilesAggregationBuilder builder =
new PercentilesAggregationBuilder("test").field("number").method(PercentilesMethod.HDR);
MappedFieldType fieldType = new NumberFieldMapper.NumberFieldType(NumberFieldMapper.NumberType.LONG);
fieldType.setName("number");
try (HDRPercentilesAggregator aggregator = createAggregator(builder, indexSearcher, fieldType)) {
aggregator.preCollection();
indexSearcher.search(query, aggregator);
aggregator.postCollection();
verify.accept((InternalHDRPercentiles) aggregator.buildAggregation(0L));
}
}
}
}
}

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core/src/test/java/org/elasticsearch/search/aggregations/metrics/percentiles/tdigest/TDigestPercentilesAggregatorTests.java Normal file
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/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch licenses this file to you 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 org.elasticsearch.search.aggregations.metrics.percentiles.tdigest;
import org.apache.lucene.document.LongPoint;
import org.apache.lucene.document.NumericDocValuesField;
import org.apache.lucene.document.SortedNumericDocValuesField;
import org.apache.lucene.index.DirectoryReader;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.search.FieldValueQuery;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.search.Query;
import org.apache.lucene.store.Directory;
import org.elasticsearch.common.CheckedConsumer;
import org.elasticsearch.index.mapper.MappedFieldType;
import org.elasticsearch.index.mapper.NumberFieldMapper;
import org.elasticsearch.search.aggregations.AggregatorTestCase;
import org.elasticsearch.search.aggregations.metrics.percentiles.PercentilesAggregationBuilder;
import org.elasticsearch.search.aggregations.metrics.percentiles.PercentilesMethod;
import java.io.IOException;
import java.util.function.Consumer;
import static java.util.Arrays.asList;
import static java.util.Collections.singleton;
public class TDigestPercentilesAggregatorTests extends AggregatorTestCase {
public void testNoDocs() throws IOException {
testCase(new MatchAllDocsQuery(), iw -> {
// Intentionally not writing any docs
}, tdigest -> {
assertEquals(0L, tdigest.state.size());
});
}
public void testNoMatchingField() throws IOException {
testCase(new MatchAllDocsQuery(), iw -> {
iw.addDocument(singleton(new SortedNumericDocValuesField("wrong_number", 7)));
iw.addDocument(singleton(new SortedNumericDocValuesField("wrong_number", 1)));
}, tdigest -> {
assertEquals(0L, tdigest.state.size());
});
}
public void testSomeMatchesSortedNumericDocValues() throws IOException {
testCase(new FieldValueQuery("number"), iw -> {
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 8)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 5)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 3)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 2)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 1)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 1)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 0)));
}, tdigest -> {
assertEquals(7L, tdigest.state.size());
assertEquals(7L, tdigest.state.centroidCount());
assertEquals(4.0d, tdigest.percentile(75), 0.0d);
assertEquals("4.0", tdigest.percentileAsString(75));
assertEquals(2.0d, tdigest.percentile(50), 0.0d);
assertEquals("2.0", tdigest.percentileAsString(50));
assertEquals(1.0d, tdigest.percentile(20), 0.0d);
assertEquals("1.0", tdigest.percentileAsString(20));
});
}
public void testSomeMatchesNumericDocValues() throws IOException {
testCase(new FieldValueQuery("number"), iw -> {
iw.addDocument(singleton(new NumericDocValuesField("number", 8)));
iw.addDocument(singleton(new NumericDocValuesField("number", 5)));
iw.addDocument(singleton(new NumericDocValuesField("number", 3)));
iw.addDocument(singleton(new NumericDocValuesField("number", 2)));
iw.addDocument(singleton(new NumericDocValuesField("number", 1)));
iw.addDocument(singleton(new NumericDocValuesField("number", 1)));
iw.addDocument(singleton(new NumericDocValuesField("number", 0)));
}, tdigest -> {
assertEquals(tdigest.state.size(), 7L);
assertEquals(tdigest.state.centroidCount(), 7L);
assertEquals(8.0d, tdigest.percentile(100), 0.0d);
assertEquals("8.0", tdigest.percentileAsString(100));
assertEquals(5.48d, tdigest.percentile(86), 0.0d);
assertEquals("5.48", tdigest.percentileAsString(86));
assertEquals(1.0d, tdigest.percentile(33), 0.0d);
assertEquals("1.0", tdigest.percentileAsString(33));
assertEquals(1.0d, tdigest.percentile(25), 0.0d);
assertEquals("1.0", tdigest.percentileAsString(25));
assertEquals(0.06d, tdigest.percentile(1), 0.0d);
assertEquals("0.06", tdigest.percentileAsString(1));
});
}
public void testQueryFiltering() throws IOException {
final CheckedConsumer<RandomIndexWriter, IOException> docs = iw -> {
iw.addDocument(asList(new LongPoint("row", 7), new SortedNumericDocValuesField("number", 8)));
iw.addDocument(asList(new LongPoint("row", 6), new SortedNumericDocValuesField("number", 5)));
iw.addDocument(asList(new LongPoint("row", 5), new SortedNumericDocValuesField("number", 3)));
iw.addDocument(asList(new LongPoint("row", 4), new SortedNumericDocValuesField("number", 2)));
iw.addDocument(asList(new LongPoint("row", 3), new SortedNumericDocValuesField("number", 1)));
iw.addDocument(asList(new LongPoint("row", 2), new SortedNumericDocValuesField("number", 1)));
iw.addDocument(asList(new LongPoint("row", 1), new SortedNumericDocValuesField("number", 0)));
};
testCase(LongPoint.newRangeQuery("row", 1, 4), docs, tdigest -> {
assertEquals(4L, tdigest.state.size());
assertEquals(4L, tdigest.state.centroidCount());
assertEquals(2.0d, tdigest.percentile(100), 0.0d);
assertEquals(1.0d, tdigest.percentile(50), 0.0d);
assertEquals(0.75d, tdigest.percentile(25), 0.0d);
});
testCase(LongPoint.newRangeQuery("row", 100, 110), docs, tdigest -> {
assertEquals(0L, tdigest.state.size());
assertEquals(0L, tdigest.state.centroidCount());
});
}
private void testCase(Query query, CheckedConsumer<RandomIndexWriter, IOException> buildIndex,
Consumer<InternalTDigestPercentiles> verify) throws IOException {
try (Directory directory = newDirectory()) {
try (RandomIndexWriter indexWriter = new RandomIndexWriter(random(), directory)) {
buildIndex.accept(indexWriter);
}
try (IndexReader indexReader = DirectoryReader.open(directory)) {
IndexSearcher indexSearcher = newSearcher(indexReader, true, true);
PercentilesAggregationBuilder builder =
new PercentilesAggregationBuilder("test").field("number").method(PercentilesMethod.TDIGEST);
MappedFieldType fieldType = new NumberFieldMapper.NumberFieldType(NumberFieldMapper.NumberType.LONG);
fieldType.setName("number");
try (TDigestPercentilesAggregator aggregator = createAggregator(builder, indexSearcher, fieldType)) {
aggregator.preCollection();
indexSearcher.search(query, aggregator);
aggregator.postCollection();
verify.accept((InternalTDigestPercentiles) aggregator.buildAggregation(0L));
}
}
}
}
}