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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.schema.document;
import java.util.Optional;
import org.junit.jupiter.api.Test;
import static org.hamcrest.core.Is.is;
import static org.hamcrest.MatcherAssert.assertThat;
public class HnswIndexParamsTestCase {
@Test
void override_from() throws Exception {
var empty = new HnswIndexParams();
var builder = new HnswIndexParams.Builder();
builder.setMaxLinksPerNode(7);
builder.setMultiThreadedIndexing(false);
var one = builder.build();
builder.setNeighborsToExploreAtInsert(42);
var three = builder.build();
builder.setMaxLinksPerNode(17);
builder.setNeighborsToExploreAtInsert(500);
builder.setMultiThreadedIndexing(true);
var four = builder.build();
assertThat(empty.maxLinksPerNode(), is(16));
assertThat(empty.neighborsToExploreAtInsert(), is(200));
assertThat(empty.multiThreadedIndexing(), is(true));
assertThat(one.maxLinksPerNode(), is(7));
assertThat(one.multiThreadedIndexing(), is(false));
assertThat(three.neighborsToExploreAtInsert(), is(42));
assertThat(four.maxLinksPerNode(), is(17));
assertThat(four.neighborsToExploreAtInsert(), is(500));
assertThat(four.multiThreadedIndexing(), is(true));
var five = four.overrideFrom(Optional.of(empty));
assertThat(five.maxLinksPerNode(), is(17));
assertThat(five.neighborsToExploreAtInsert(), is(500));
assertThat(five.multiThreadedIndexing(), is(true));
var six = four.overrideFrom(Optional.of(one));
assertThat(six.maxLinksPerNode(), is(7));
assertThat(six.neighborsToExploreAtInsert(), is(500));
// This is explicitly set to false in 'one'
assertThat(six.multiThreadedIndexing(), is(false));
}
}
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