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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.search.predicate.index;
import org.junit.jupiter.api.Test;
import java.util.Arrays;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author <a href="mailto:magnarn@yahoo-inc.com">Magnar Nedland</a>
*/
public class ZstarCompressedPostingListTest {
@Test
void requireThatPostingListCanIterate() {
PredicateIntervalStore.Builder builder = new PredicateIntervalStore.Builder();
int ref1 = builder.insert(Arrays.asList(0x10000));
int ref2 = builder.insert(Arrays.asList(0x10000, 0x0ffff));
int ref3 = builder.insert(Arrays.asList(0x10000, 0x00003, 0x40003, 0x60005));
ZstarCompressedPostingList postingList = new ZstarCompressedPostingList(
builder.build(), new int[]{2, 4, 6}, new int[]{ref1, ref2, ref3});
assertEquals(-1, postingList.getDocId());
assertEquals(0, postingList.getInterval());
assertEquals(0xffffffffffffffffL, postingList.getSubquery());
assertTrue(postingList.nextDocument(0));
assertTrue(postingList.prepareIntervals());
assertEquals(2, postingList.getDocId());
assertEquals(0x10000, postingList.getInterval());
assertTrue(postingList.nextInterval());
assertEquals(0x20001, postingList.getInterval());
assertFalse(postingList.nextInterval());
assertTrue(postingList.nextDocument(2));
assertTrue(postingList.prepareIntervals());
assertEquals(4, postingList.getDocId());
assertEquals(0x00010000, postingList.getInterval());
assertTrue(postingList.nextInterval());
assertEquals(0xffff0001, postingList.getInterval());
assertFalse(postingList.nextInterval());
assertTrue(postingList.nextDocument(4));
assertTrue(postingList.prepareIntervals());
assertEquals(6, postingList.getDocId());
assertEquals(0x10000, postingList.getInterval());
assertTrue(postingList.nextInterval());
assertEquals(0x30001, postingList.getInterval());
assertTrue(postingList.nextInterval());
assertEquals(0x40003, postingList.getInterval());
assertTrue(postingList.nextInterval());
assertEquals(0x50004, postingList.getInterval());
assertTrue(postingList.nextInterval());
assertEquals(0x60005, postingList.getInterval());
assertTrue(postingList.nextInterval());
assertEquals(0x70006, postingList.getInterval());
assertFalse(postingList.nextInterval());
assertFalse(postingList.nextDocument(6));
}
}
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