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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.prelude.query.test;
import com.yahoo.prelude.query.AndItem;
import com.yahoo.prelude.query.EquivItem;
import com.yahoo.prelude.query.MarkerWordItem;
import com.yahoo.prelude.query.NearItem;
import com.yahoo.prelude.query.ONearItem;
import com.yahoo.prelude.query.PureWeightedInteger;
import com.yahoo.prelude.query.PureWeightedString;
import com.yahoo.prelude.query.WeakAndItem;
import com.yahoo.prelude.query.WordItem;
import org.junit.jupiter.api.Test;
import java.nio.ByteBuffer;
import static org.junit.jupiter.api.Assertions.assertEquals;
/**
* Item encoding tests
*
* @author bratseth
*/
public class ItemEncodingTestCase {
private void assertType(ByteBuffer buffer, int etype, int features) {
byte type = buffer.get();
assertEquals(etype, type & 0x1f, "Code");
assertEquals(features, (type & 0xe0) >> 5, "Features");
}
private void assertWeight(ByteBuffer buffer, int weight) {
int w = (weight > (1 << 5)) ? buffer.getShort() & 0x3fff: buffer.get();
assertEquals(weight, w, "Weight");
}
@Test
void testWordItemEncoding() {
WordItem word = new WordItem("test");
word.setWeight(150);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = word.encode(buffer);
buffer.flip();
assertEquals(1, count, "Serialization count");
assertType(buffer, 4, 1);
assertWeight(buffer, 150);
assertEquals(0, buffer.get(), "Index length");
assertEquals(4, buffer.get(), "Word length");
assertEquals(4, buffer.remaining(), "Word length");
assertEquals('t', buffer.get());
assertEquals('e', buffer.get());
assertEquals('s', buffer.get());
assertEquals('t', buffer.get());
}
@Test
void testStartHostMarkerEncoding() {
WordItem word = MarkerWordItem.createStartOfHost();
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = word.encode(buffer);
buffer.flip();
assertEquals(1, count, "Serialization count");
assertType(buffer, 4, 0);
assertEquals(0, buffer.get(), "Index length");
assertEquals(9, buffer.get(), "Word length");
assertEquals(9, buffer.remaining(), "Word length");
assertEquals('S', buffer.get());
assertEquals('t', buffer.get());
assertEquals('A', buffer.get());
assertEquals('r', buffer.get());
assertEquals('T', buffer.get());
assertEquals('h', buffer.get());
assertEquals('O', buffer.get());
assertEquals('s', buffer.get());
assertEquals('T', buffer.get());
}
@Test
void testEndHostMarkerEncoding() {
WordItem word = MarkerWordItem.createEndOfHost();
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = word.encode(buffer);
buffer.flip();
assertEquals(1, count, "Serialization count");
assertType(buffer, 4, 0);
assertEquals(0, buffer.get(), "Index length");
assertEquals(7, buffer.get(), "Word length");
assertEquals(7, buffer.remaining(), "Word length");
assertEquals('E', buffer.get());
assertEquals('n', buffer.get());
assertEquals('D', buffer.get());
assertEquals('h', buffer.get());
assertEquals('O', buffer.get());
assertEquals('s', buffer.get());
assertEquals('T', buffer.get());
}
@Test
void testFilterWordItemEncoding() {
WordItem word = new WordItem("test");
word.setFilter(true);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = word.encode(buffer);
buffer.flip();
assertEquals(1, count, "Serialization count");
assertType(buffer, 4, 4);
assertEquals(0x08, buffer.get());
assertEquals(0, buffer.get(), "Index length");
assertEquals(4, buffer.get(), "Word length");
assertEquals(4, buffer.remaining(), "Word length");
assertEquals('t', buffer.get());
assertEquals('e', buffer.get());
assertEquals('s', buffer.get());
assertEquals('t', buffer.get());
}
@Test
void testNoRankedNoPositionDataWordItemEncoding() {
WordItem word = new WordItem("test");
word.setRanked(false);
word.setPositionData(false);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = word.encode(buffer);
buffer.flip();
assertEquals(1, count, "Serialization count");
assertType(buffer, 4, 4);
assertEquals(0x05, buffer.get());
assertEquals(0, buffer.get(), "Index length");
assertEquals(4, buffer.get(), "Word length");
assertEquals(4, buffer.remaining(), "Word length");
assertEquals('t', buffer.get());
assertEquals('e', buffer.get());
assertEquals('s', buffer.get());
assertEquals('t', buffer.get());
}
@Test
void testAndItemEncoding() {
WordItem a = new WordItem("a");
WordItem b = new WordItem("b");
AndItem and = new AndItem();
and.addItem(a);
and.addItem(b);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = and.encode(buffer);
buffer.flip();
assertEquals(3, count, "Serialization count");
assertType(buffer, 1, 0);
assertEquals(2, buffer.get(), "And arity");
assertWord(buffer, "a");
assertWord(buffer, "b");
}
@Test
void testNearItemEncoding() {
WordItem a = new WordItem("a");
WordItem b = new WordItem("b");
NearItem near = new NearItem(7);
near.addItem(a);
near.addItem(b);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = near.encode(buffer);
buffer.flip();
assertEquals(3, count, "Serialization count");
assertType(buffer, 11, 0);
assertEquals(2, buffer.get(), "Near arity");
assertEquals(7, buffer.get(), "Limit");
assertWord(buffer, "a");
assertWord(buffer, "b");
}
@Test
void testONearItemEncoding() {
WordItem a = new WordItem("a");
WordItem b = new WordItem("b");
NearItem onear = new ONearItem(7);
onear.addItem(a);
onear.addItem(b);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = onear.encode(buffer);
buffer.flip();
assertEquals(3, count, "Serialization count");
assertType(buffer, 12, 0);
assertEquals(2, buffer.get(), "Near arity");
assertEquals(7, buffer.get(), "Limit");
assertWord(buffer, "a");
assertWord(buffer, "b");
}
@Test
void testEquivItemEncoding() {
WordItem a = new WordItem("a");
WordItem b = new WordItem("b");
EquivItem equiv = new EquivItem();
equiv.addItem(a);
equiv.addItem(b);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = equiv.encode(buffer);
buffer.flip();
assertEquals(3, count, "Serialization count");
assertType(buffer, 14, 0);
assertEquals(2, buffer.get(), "Equiv arity");
assertWord(buffer, "a");
assertWord(buffer, "b");
}
@Test
void testWandItemEncoding() {
WordItem a = new WordItem("a");
WordItem b = new WordItem("b");
WeakAndItem wand = new WeakAndItem();
wand.addItem(a);
wand.addItem(b);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = wand.encode(buffer);
buffer.flip();
assertEquals(3, count, "Serialization count");
assertType(buffer, 16, 0);
assertEquals(2, buffer.get(), "WeakAnd arity");
assertEquals(100, buffer.getShort() & 0x3fff, "WeakAnd N");
assertEquals(0, buffer.get());
assertWord(buffer, "a");
assertWord(buffer, "b");
}
@Test
void testPureWeightedStringEncoding() {
PureWeightedString a = new PureWeightedString("a");
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = a.encode(buffer);
buffer.flip();
assertEquals(3, buffer.remaining(), "Serialization size");
assertEquals(1, count, "Serialization count");
assertType(buffer, 19, 0);
assertString(buffer, a.getString());
}
@Test
void testPureWeightedStringEncodingWithNonDefaultWeight() {
PureWeightedString a = new PureWeightedString("a", 7);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = a.encode(buffer);
buffer.flip();
assertEquals(4, buffer.remaining(), "Serialization size");
assertEquals(1, count, "Serialization count");
assertType(buffer, 19, 1);
assertWeight(buffer, 7);
assertString(buffer, a.getString());
}
@Test
void testPureWeightedIntegerEncoding() {
PureWeightedInteger a = new PureWeightedInteger(23432568763534865l);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = a.encode(buffer);
buffer.flip();
assertEquals(9, buffer.remaining(), "Serialization size");
assertEquals(1, count, "Serialization count");
assertType(buffer, 20, 0);
assertEquals(a.getValue(), buffer.getLong(), "Value");
}
@Test
void testPureWeightedLongEncodingWithNonDefaultWeight() {
PureWeightedInteger a = new PureWeightedInteger(23432568763534865l, 7);
ByteBuffer buffer = ByteBuffer.allocate(128);
int count = a.encode(buffer);
buffer.flip();
assertEquals(10, buffer.remaining(), "Serialization size");
assertEquals(1, count, "Serialization count");
assertType(buffer, 20, 1);
assertWeight(buffer, 7);
assertEquals(a.getValue(), buffer.getLong(), "Value");
;
}
private void assertString(ByteBuffer buffer, String word) {
assertEquals(word.length(), buffer.get(), "Word length");
for (int i=0; i<word.length(); i++) {
assertEquals(word.charAt(i), buffer.get(), "Character at " + i);
}
}
private void assertWord(ByteBuffer buffer,String word) {
assertType(buffer, 4, 0);
assertEquals(0, buffer.get(), "Index length");
assertString(buffer, word);
}
}
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