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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.search.predicate.index;
import com.google.common.primitives.Ints;
import org.junit.jupiter.api.Test;
import java.util.ArrayList;
import java.util.List;
import static org.junit.jupiter.api.Assertions.*;
/**
* This test lies in com.yahoo.search.predicate to get access to some methods of PredicateIndex.
*
* @author <a href="mailto:magnarn@yahoo-inc.com">Magnar Nedland</a>
*/
public class BoundsPostingListTest {
@Test
void requireThatPostingListChecksBounds() {
PredicateIntervalStore.Builder builder = new PredicateIntervalStore.Builder();
List<Integer> docIds = new ArrayList<>();
List<Integer> dataRefs = new ArrayList<>();
for (int id = 1; id < 100; ++id) {
List<IntervalWithBounds> boundsList = new ArrayList<>();
for (int i = 0; i <= id; ++i) {
int bounds;
if (id < 30) {
bounds = 0x80000000 | i; // diff >= i
} else if (id < 60) {
bounds = 0x40000000 | i; // diff < i
} else {
bounds = (i << 16) | (i + 10); // i < diff < i + 10
}
boundsList.add(new IntervalWithBounds((i + 1) << 16 | 0xffff, bounds));
}
docIds.add(id);
dataRefs.add(builder.insert(boundsList.stream().flatMap(IntervalWithBounds::stream).toList()));
}
PredicateIntervalStore store = builder.build();
BoundsPostingList postingList = new BoundsPostingList(
store, Ints.toArray(docIds), Ints.toArray(dataRefs), 0xffffffffffffffffL, 5);
assertEquals(-1, postingList.getDocId());
assertEquals(0, postingList.getInterval());
assertEquals(0xffffffffffffffffL, postingList.getSubquery());
checkNext(postingList, 0, 1, 2); // [0..] .. [1..]
checkNext(postingList, 1, 2, 3); // [0..] .. [2..]
checkNext(postingList, 10, 11, 6); // [0..] .. [5..]
checkNext(postingList, 20, 21, 6);
checkNext(postingList, 30, 31, 26); // [..5] .. [..30]
checkNext(postingList, 50, 51, 46);
checkNext(postingList, 60, 61, 6); // [0..10] .. [5..15]
postingList = new BoundsPostingList(store, Ints.toArray(docIds), Ints.toArray(dataRefs), 0xffffffffffffffffL, 40);
checkNext(postingList, 0, 1, 2);
checkNext(postingList, 20, 21, 22);
checkNext(postingList, 30, 31, 0); // skip ahead to match
checkNext(postingList, 32, 33, 0); // skip ahead to match
checkNext(postingList, 33, 34, 0); // skip ahead to match
checkNext(postingList, 40, 41, 1);
checkNext(postingList, 50, 51, 11); // [..40] .. [..50]
checkNext(postingList, 60, 61, 10); // [31..40] .. [40..49]
}
private void checkNext(BoundsPostingList postingList, int movePast, int docId, int intervalCount) {
assertTrue(postingList.nextDocument(movePast), "Unable to move past " + movePast);
assertEquals(intervalCount > 0, postingList.prepareIntervals());
assertEquals(docId, postingList.getDocId());
for (int i = 0; i < intervalCount - 1; ++i) {
assertTrue(postingList.nextInterval(), "Too few intervals, expected " + intervalCount);
}
assertFalse(postingList.nextInterval(), "Too many intervals, expected " + intervalCount);
}
}
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