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Adds unit test for sampler aggregation (#23243)
* Adds unit test for sampler aggregation Relates to #22278
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...est/java/org/elasticsearch/search/aggregations/bucket/sampler/SamplerAggregatorTests.java
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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. | ||
*/ | ||
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package org.elasticsearch.search.aggregations.bucket.sampler; | ||
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import org.apache.lucene.analysis.standard.StandardAnalyzer; | ||
import org.apache.lucene.document.Document; | ||
import org.apache.lucene.document.Field; | ||
import org.apache.lucene.document.SortedNumericDocValuesField; | ||
import org.apache.lucene.index.IndexReader; | ||
import org.apache.lucene.index.RandomIndexWriter; | ||
import org.apache.lucene.index.Term; | ||
import org.apache.lucene.search.IndexSearcher; | ||
import org.apache.lucene.search.TermQuery; | ||
import org.apache.lucene.store.Directory; | ||
import org.elasticsearch.index.analysis.AnalyzerScope; | ||
import org.elasticsearch.index.analysis.NamedAnalyzer; | ||
import org.elasticsearch.index.mapper.MappedFieldType; | ||
import org.elasticsearch.index.mapper.NumberFieldMapper; | ||
import org.elasticsearch.index.mapper.TextFieldMapper.TextFieldType; | ||
import org.elasticsearch.search.aggregations.AggregatorTestCase; | ||
import org.elasticsearch.search.aggregations.metrics.min.Min; | ||
import org.elasticsearch.search.aggregations.metrics.min.MinAggregationBuilder; | ||
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import java.io.IOException; | ||
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public class SamplerAggregatorTests extends AggregatorTestCase { | ||
/** | ||
* Uses the sampler aggregation to find the minimum value of a field out of the top 3 scoring documents in a search. | ||
*/ | ||
public void testSampler() throws IOException { | ||
TextFieldType textFieldType = new TextFieldType(); | ||
textFieldType.setIndexAnalyzer(new NamedAnalyzer("foo", AnalyzerScope.GLOBAL, new StandardAnalyzer())); | ||
MappedFieldType numericFieldType = new NumberFieldMapper.NumberFieldType(NumberFieldMapper.NumberType.LONG); | ||
numericFieldType.setName("int"); | ||
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try (Directory dir = newDirectory(); | ||
RandomIndexWriter w = new RandomIndexWriter(random(), dir)) { | ||
for (long value : new long[] {7, 3, -10, -6, 5, 50}) { | ||
Document doc = new Document(); | ||
StringBuilder text = new StringBuilder(); | ||
for (int i = 0; i < value; i++) { | ||
text.append("good "); | ||
} | ||
doc.add(new Field("text", text.toString(), textFieldType)); | ||
doc.add(new SortedNumericDocValuesField("int", value)); | ||
w.addDocument(doc); | ||
} | ||
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SamplerAggregationBuilder aggBuilder = new SamplerAggregationBuilder("sampler") | ||
.shardSize(3) | ||
.subAggregation(new MinAggregationBuilder("min") | ||
.field("int")); | ||
try (IndexReader reader = w.getReader()) { | ||
IndexSearcher searcher = new IndexSearcher(reader); | ||
Sampler sampler = searchAndReduce(searcher, new TermQuery(new Term("text", "good")), aggBuilder, textFieldType, | ||
numericFieldType); | ||
Min min = sampler.getAggregations().get("min"); | ||
assertEquals(5.0, min.getValue(), 0); | ||
} | ||
} | ||
} | ||
} |