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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 java.util.Iterator;
import static org.junit.jupiter.api.Assertions.*;
/**
* @author Simon Thoresen Hult
*/
public class CompositeContinuationTestCase {
@Test
void requireThatAccessorsWork() {
CompositeContinuation cnt = new CompositeContinuation();
Iterator<EncodableContinuation> it = cnt.iterator();
assertFalse(it.hasNext());
EncodableContinuation foo = new MyContinuation();
cnt.add(foo);
it = cnt.iterator();
assertTrue(it.hasNext());
assertSame(foo, it.next());
assertFalse(it.hasNext());
EncodableContinuation bar = new MyContinuation();
cnt.add(bar);
it = cnt.iterator();
assertTrue(it.hasNext());
assertSame(foo, it.next());
assertTrue(it.hasNext());
assertSame(bar, it.next());
assertFalse(it.hasNext());
}
@Test
void requireThatCompositeContinuationsAreFlattened() {
assertEncode("BCBCBCBEBGBCBKCBACBKCCK",
newComposite(newOffset(1, 1, 2, 3), newOffset(5, 8, 13, 21)));
assertEncode("BCBBBBBDBFBCBJBPCBJCCJ",
newComposite(newComposite(newOffset(-1, -1, -2, -3)), newComposite(newOffset(-5, -8, -13, -21))));
}
@Test
void requireThatEmptyStringCanBeDecoded() {
assertDecode("", new CompositeContinuation());
}
@Test
void requireThatCompositeContinuationsCanBeDecoded() {
assertDecode("BCBCBCBEBGBCBKCBACBKCCK",
newComposite(newOffset(1, 1, 2, 3), newOffset(5, 8, 13, 21)));
assertDecode("BCBBBBBDBFBCBJBPCBJCCJ",
newComposite(newOffset(-1, -1, -2, -3), newOffset(-5, -8, -13, -21)));
}
@Test
void requireThatHashCodeIsImplemented() {
assertEquals(newComposite().hashCode(), newComposite().hashCode());
}
@Test
void requireThatEqualsIsImplemented() {
CompositeContinuation cnt = newComposite();
assertNotEquals(cnt, new Object());
assertEquals(cnt, newComposite());
assertNotEquals(cnt, newComposite(newOffset(1, 1, 2, 3)));
assertNotEquals(cnt, newComposite(newOffset(1, 1, 2, 3), newOffset(5, 8, 13, 21)));
assertNotEquals(cnt, newComposite(newOffset(5, 8, 13, 21)));
cnt = newComposite(newOffset(1, 1, 2, 3));
assertNotEquals(cnt, new Object());
assertEquals(cnt, newComposite(newOffset(1, 1, 2, 3)));
assertNotEquals(cnt, newComposite(newOffset(1, 1, 2, 3), newOffset(5, 8, 13, 21)));
assertNotEquals(cnt, newComposite(newOffset(5, 8, 13, 21)));
cnt = newComposite(newOffset(1, 1, 2, 3), newOffset(5, 8, 13, 21));
assertNotEquals(cnt, new Object());
assertNotEquals(cnt, newComposite(newOffset(1, 1, 2, 3)));
assertEquals(cnt, newComposite(newOffset(1, 1, 2, 3), newOffset(5, 8, 13, 21)));
assertNotEquals(cnt, newComposite(newOffset(5, 8, 13, 21)));
}
private static CompositeContinuation newComposite(EncodableContinuation... children) {
CompositeContinuation ret = new CompositeContinuation();
for (EncodableContinuation child : children) {
ret.add(child);
}
return ret;
}
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, ContinuationDecoder.decode(toDecode));
}
private static class MyContinuation extends EncodableContinuation {
@Override
public EncodableContinuation copy() {
return null;
}
@Override
public void encode(IntegerEncoder out) {
}
}
}
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