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BlockEntryTest.java
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BlockEntryTest.java
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/*
* Copyright (c) 2002-2019 "Neo4j,"
* Neo4j Sweden AB [http://neo4j.com]
*
* This file is part of Neo4j.
*
* Neo4j is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package org.neo4j.kernel.impl.index.schema;
import org.apache.commons.lang3.mutable.MutableLong;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.extension.ExtendWith;
import java.util.ArrayList;
import java.util.List;
import org.neo4j.index.internal.gbptree.SimpleLongLayout;
import org.neo4j.io.pagecache.ByteArrayPageCursor;
import org.neo4j.io.pagecache.PageCursor;
import org.neo4j.test.extension.Inject;
import org.neo4j.test.extension.RandomExtension;
import org.neo4j.test.rule.RandomRule;
import static org.junit.jupiter.api.Assertions.assertEquals;
@ExtendWith( RandomExtension.class )
class BlockEntryTest
{
@Inject
RandomRule rnd;
private static final PageCursor pageCursor = ByteArrayPageCursor.wrap( 1000 );
private static SimpleLongLayout layout;
@BeforeEach
void setup()
{
layout = SimpleLongLayout.longLayout()
.withFixedSize( rnd.nextBoolean() )
.withKeyPadding( rnd.nextInt( 10 ) )
.build();
}
@Test
void shouldReadWriteSingleEntry()
{
// given
MutableLong writeKey = layout.key( rnd.nextLong() );
MutableLong writeValue = layout.value( rnd.nextLong() );
int offset = pageCursor.getOffset();
BlockEntry.write( pageCursor, layout, writeKey, writeValue );
// when
MutableLong readKey = layout.newKey();
MutableLong readValue = layout.newValue();
pageCursor.setOffset( offset );
BlockEntry.read( pageCursor, layout, readKey, readValue );
// then
assertEquals( 0, layout.compare( writeKey, readKey ) );
assertEquals( 0, layout.compare( writeValue, readValue ) );
}
@Test
void shouldReadWriteMultipleEntries()
{
List<BlockEntry<MutableLong,MutableLong>> expectedEntries = new ArrayList<>();
int nbrOfEntries = 10;
int offset = pageCursor.getOffset();
for ( int i = 0; i < nbrOfEntries; i++ )
{
BlockEntry<MutableLong,MutableLong> entry = new BlockEntry<>( layout.key( rnd.nextLong() ), layout.value( rnd.nextLong() ) );
BlockEntry.write( pageCursor, layout, entry );
expectedEntries.add( entry );
}
pageCursor.setOffset( offset );
for ( BlockEntry<MutableLong,MutableLong> expectedEntry : expectedEntries )
{
BlockEntry<MutableLong,MutableLong> actualEntry = BlockEntry.read( pageCursor, layout );
assertBlockEquals( expectedEntry, actualEntry );
}
}
private void assertBlockEquals( BlockEntry<MutableLong,MutableLong> expected, BlockEntry<MutableLong,MutableLong> actual )
{
assertEquals( 0, layout.compare( expected.key(), actual.key() ) );
assertEquals( 0, layout.compare( expected.value(), actual.value() ) );
}
}