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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.grouping.vespa;
import com.yahoo.search.grouping.Continuation;
import org.junit.jupiter.api.Test;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author Simon Thoresen Hult
*/
public class OffsetContinuationTestCase {
@Test
void requireThatNullResultIdThrowsException() {
try {
new OffsetContinuation(null, 0, 0, 0);
fail();
} catch (NullPointerException e) {
}
}
@Test
void requireThatAccessorsWork() {
OffsetContinuation cnt = new OffsetContinuation(ResultId.valueOf(1), 2, 3, 4);
assertEquals(ResultId.valueOf(1), cnt.getResultId());
assertEquals(2, cnt.getTag());
assertEquals(3, cnt.getOffset());
assertEquals(4, cnt.getFlags());
cnt = new OffsetContinuation(ResultId.valueOf(5), 6, 7, 8);
assertEquals(ResultId.valueOf(5), cnt.getResultId());
assertEquals(6, cnt.getTag());
assertEquals(7, cnt.getOffset());
assertEquals(8, cnt.getFlags());
for (int i = 0; i < 30; ++i) {
cnt = new OffsetContinuation(ResultId.valueOf(1), 2, 3, (1 << i) + (1 << i + 1));
assertTrue(cnt.testFlag(1 << i));
assertTrue(cnt.testFlag(1 << i + 1));
assertFalse(cnt.testFlag(1 << i + 2));
}
}
@Test
void requireThatOffsetContinuationsCanBeEncoded() {
assertEncode("BCBCBCBEBG", newOffset(1, 1, 2, 3));
assertEncode("BCBKCBACBKCCK", newOffset(5, 8, 13, 21));
assertEncode("BCBBBBBDBF", newOffset(-1, -1, -2, -3));
assertEncode("BCBJBPCBJCCJ", newOffset(-5, -8, -13, -21));
}
@Test
void requireThatOffsetContinuationsCanBeDecoded() {
assertDecode("BCBCBCBEBG", newOffset(1, 1, 2, 3));
assertDecode("BCBKCBACBKCCK", newOffset(5, 8, 13, 21));
assertDecode("BCBBBBBDBF", newOffset(-1, -1, -2, -3));
assertDecode("BCBJBPCBJCCJ", newOffset(-5, -8, -13, -21));
}
@Test
void requireThatHashCodeIsImplemented() {
assertEquals(newOffset(1, 1, 2, 3).hashCode(), newOffset(1, 1, 2, 3).hashCode());
}
@Test
void requireThatEqualsIsImplemented() {
Continuation cnt = newOffset(1, 1, 2, 3);
assertNotEquals(cnt, new Object());
assertNotEquals(cnt, newOffset(0, 1, 2, 3));
assertNotEquals(cnt, newOffset(1, 0, 2, 3));
assertNotEquals(cnt, newOffset(1, 1, 0, 3));
assertNotEquals(cnt, newOffset(1, 1, 2, 0));
assertEquals(cnt, newOffset(1, 1, 2, 3));
}
private static OffsetContinuation newOffset(int resultId, int tag, int offset, int flags) {
return new OffsetContinuation(ResultId.valueOf(resultId), tag, offset, flags);
}
private static void assertEncode(String expected, EncodableContinuation toEncode) {
IntegerEncoder actual = new IntegerEncoder();
toEncode.encode(actual);
assertEquals(expected, actual.toString());
}
private static void assertDecode(String toDecode, Continuation expected) {
assertEquals(expected, OffsetContinuation.decode(new IntegerDecoder(toDecode)));
}
}
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