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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
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package org.elasticsearch.search.aggregations.metrics.sum;

import org.elasticsearch.common.io.stream.Writeable;
import org.elasticsearch.search.DocValueFormat;
import org.elasticsearch.search.aggregations.pipeline.PipelineAggregator;
import org.elasticsearch.test.InternalAggregationTestCase;

import java.util.List;
import java.util.Map;

public class InternalSumTests extends InternalAggregationTestCase<InternalSum> {

    @Override
    protected InternalSum createTestInstance(String name, List<PipelineAggregator> pipelineAggregators, Map<String, Object> metaData) {
        return new InternalSum(name, randomDouble(), DocValueFormat.RAW, pipelineAggregators, metaData);
    }

    @Override
    protected Writeable.Reader<InternalSum> instanceReader() {
        return InternalSum::new;
    }

    @Override
    protected void assertReduced(InternalSum reduced, List<InternalSum> inputs) {
        double expectedSum = inputs.stream().mapToDouble(InternalSum::getValue).sum();
        assertEquals(expectedSum, reduced.getValue(), 0.0001d);
    }
}