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// Copyright Vespa.ai. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.searchlib.aggregation;
import com.yahoo.searchlib.aggregation.hll.*;
import com.yahoo.vespa.objects.BufferSerializer;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
/**
* @author bjorncs
*/
public class ExpressionCountAggregationResultTest {
@Test
public void requireThatSketchesAreMerged() {
ExpressionCountAggregationResult aggr1 = createAggregationWithSparseSketch(42);
ExpressionCountAggregationResult aggr2 = createAggregationWithSparseSketch(1337);
// Merge performs union of the underlying data of the sparse sketch.
aggr1.onMerge(aggr2);
SparseSketch sketch = (SparseSketch) aggr1.getSketch();
SketchUtils.assertSparseSketchContains(sketch, 42, 1337);
}
@Test
public void requireThatEstimateIsCorrect() {
ExpressionCountAggregationResult aggr = createAggregationWithSparseSketch(42);
assertTrue(aggr.getEstimatedUniqueCount() == 1);
}
@Test
public void requireThatPostMergeUpdatesEstimate() {
ExpressionCountAggregationResult aggr = createAggregationWithSparseSketch(1337);
assertEquals(1, aggr.getEstimatedUniqueCount());
// Merge performs union of the underlying data of the sparse sketch.
aggr.onMerge(createAggregationWithSparseSketch(9001));
assertEquals(2, aggr.getEstimatedUniqueCount());
}
@Test
public void requireThatSerializationDeserializationMatchSparseSketch() {
ExpressionCountAggregationResult from = createAggregationWithSparseSketch(42);
ExpressionCountAggregationResult to = createAggregationWithSparseSketch(1337);
testSerialization(from, to);
}
@Test
public void requireThatSerializationDeserializationMatchNormalSketch() {
ExpressionCountAggregationResult from = createAggregationWithNormalSketch(42);
ExpressionCountAggregationResult to = createAggregationWithNormalSketch(1337);
testSerialization(from, to);
}
private void testSerialization(ExpressionCountAggregationResult from, ExpressionCountAggregationResult to) {
BufferSerializer buffer = new BufferSerializer();
from.serialize(buffer);
buffer.flip();
to.deserialize(buffer);
assertEquals(from.getSketch(), to.getSketch());
}
private static ExpressionCountAggregationResult createAggregationWithSparseSketch(int sketchValue) {
SparseSketch initialSketch = SketchUtils.createSparseSketch(sketchValue);
return new ExpressionCountAggregationResult(
initialSketch,
sketch -> ((SparseSketch) sketch).size()
);
}
private static ExpressionCountAggregationResult createAggregationWithNormalSketch(int sketchValue) {
NormalSketch initialSketch = SketchUtils.createNormalSketch(sketchValue);
return new ExpressionCountAggregationResult(
initialSketch,
sketch -> 42
);
}
}
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