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* 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
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package org.elasticsearch.search.aggregations.bucket;
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.IndexSearcher;
import org.apache.lucene.search.MatchAllDocsQuery;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.IOUtils;
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.bucket.global.GlobalAggregationBuilder;
import org.elasticsearch.search.aggregations.bucket.global.GlobalAggregator;
import org.elasticsearch.search.aggregations.bucket.global.InternalGlobal;
import org.elasticsearch.search.aggregations.metrics.min.InternalMin;
import org.elasticsearch.search.aggregations.metrics.min.MinAggregationBuilder;
import java.io.IOException;
import java.util.function.BiConsumer;
import static java.util.Collections.singleton;
public class GlobalAggregatorTests extends AggregatorTestCase {
public void testNoDocs() throws IOException {
testCase(iw -> {
// Intentionally not writing any docs
}, (global, min) -> {
assertEquals(0, global.getDocCount());
assertEquals(Double.POSITIVE_INFINITY, min.getValue(), 0);
});
}
public void testSomeDocs() throws IOException {
testCase(iw -> {
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 7)));
iw.addDocument(singleton(new SortedNumericDocValuesField("number", 1)));
}, (global, min) -> {
assertEquals(2, global.getDocCount());
assertEquals(1, min.getValue(), 0);
});
}
// Note that `global`'s fancy support for ignoring the query comes from special code in AggregationPhase. We don't test that here.
private void testCase(CheckedConsumer<RandomIndexWriter, IOException> buildIndex, BiConsumer<InternalGlobal, InternalMin> verify)
throws IOException {
Directory directory = newDirectory();
RandomIndexWriter indexWriter = new RandomIndexWriter(random(), directory);
buildIndex.accept(indexWriter);
indexWriter.close();
IndexReader indexReader = DirectoryReader.open(directory);
IndexSearcher indexSearcher = newSearcher(indexReader, true, true);
GlobalAggregationBuilder aggregationBuilder = new GlobalAggregationBuilder("_name");
aggregationBuilder.subAggregation(new MinAggregationBuilder("in_global").field("number"));
MappedFieldType fieldType = new NumberFieldMapper.NumberFieldType(NumberFieldMapper.NumberType.LONG);
fieldType.setName("number");
try (GlobalAggregator aggregator = createAggregator(aggregationBuilder, indexSearcher, fieldType)) {
try {
aggregator.preCollection();
indexSearcher.search(new MatchAllDocsQuery(), aggregator);
aggregator.postCollection();
InternalGlobal result = (InternalGlobal) aggregator.buildAggregation(0L);
verify.accept(result, (InternalMin) result.getAggregations().asMap().get("in_global"));
} finally {
IOUtils.close(aggregator.subAggregators());
}
}
indexReader.close();
directory.close();
}
}