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 * 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
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package org.elasticsearch.search.aggregations.pipeline.bucketmetrics;

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

import java.util.Arrays;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class InternalBucketMetricValueTests extends InternalAggregationTestCase<InternalBucketMetricValue> {

    @Override
    protected InternalBucketMetricValue createTestInstance(String name, List<PipelineAggregator> pipelineAggregators,
            Map<String, Object> metaData) {
        double value = frequently() ? randomDoubleBetween(-10000, 100000, true)
                : randomFrom(new Double[] { Double.NEGATIVE_INFINITY, Double.POSITIVE_INFINITY, Double.NaN });
        String[] keys = new String[randomIntBetween(0, 5)];
        for (int i = 0; i < keys.length; i++) {
            keys[i] = randomAlphaOfLength(10);
        }
        return new InternalBucketMetricValue(name, keys, value, randomNumericDocValueFormat(), pipelineAggregators, metaData);
    }

    @Override
    public void testReduceRandom() {
        expectThrows(UnsupportedOperationException.class,
                () -> createTestInstance("name", Collections.emptyList(), null).reduce(null,
                        null));
    }

    @Override
    protected void assertReduced(InternalBucketMetricValue reduced, List<InternalBucketMetricValue> inputs) {
        // no test since reduce operation is unsupported
    }

    @Override
    protected Reader<InternalBucketMetricValue> instanceReader() {
        return InternalBucketMetricValue::new;
    }

    @Override
    protected void assertFromXContent(InternalBucketMetricValue bucketMetricValue, ParsedAggregation parsedAggregation) {
        BucketMetricValue parsed = ((BucketMetricValue) parsedAggregation);
        assertArrayEquals(bucketMetricValue.keys(), parsed.keys());
        if (Double.isInfinite(bucketMetricValue.value()) == false) {
            assertEquals(bucketMetricValue.value(), parsed.value(), 0);
            assertEquals(bucketMetricValue.getValueAsString(), parsed.getValueAsString());
        } else {
            // we write Double.NEGATIVE_INFINITY and Double.POSITIVE_INFINITY to xContent as 'null', so we
            // cannot differentiate between them. Also we cannot recreate the exact String representation
            assertEquals(parsed.value(), Double.NEGATIVE_INFINITY, 0);
        }
    }

    @Override
    protected InternalBucketMetricValue mutateInstance(InternalBucketMetricValue instance) {
        String name = instance.getName();
        String[] keys = instance.keys();
        double value = instance.value();
        DocValueFormat formatter = instance.formatter();
        List<PipelineAggregator> pipelineAggregators = instance.pipelineAggregators();
        Map<String, Object> metaData = instance.getMetaData();
        switch (between(0, 3)) {
        case 0:
            name += randomAlphaOfLength(5);
            break;
        case 1:
            value += between(1, 100);
            break;
        case 2:
            keys = Arrays.copyOf(keys, keys.length + 1);
            keys[keys.length - 1] = randomAlphaOfLengthBetween(1, 20);
            break;
        case 3:
            if (metaData == null) {
                metaData = new HashMap<>(1);
            } else {
                metaData = new HashMap<>(instance.getMetaData());
            }
            metaData.put(randomAlphaOfLength(15), randomInt());
            break;
        default:
            throw new AssertionError("Illegal randomisation branch");
        }
        return new InternalBucketMetricValue(name, keys, value, formatter, pipelineAggregators, metaData);
    }
}

@@ -4039,33 +4039,176 @@
     
-value += between(1, 100);
+if (Double.isFinite(value)) %7B%0A                value += between(1, 100);%0A            %7D else %7B%0A                value = randomDoubleBetween(0, 100000, true);%0A            %7D
 %0A   

Fix edge case in InternalBucketMetricValueTests