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LuceneLegacyIndexUpgraderTest.java
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LuceneLegacyIndexUpgraderTest.java
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/*
* Copyright (c) 2002-2015 "Neo Technology,"
* Network Engine for Objects in Lund AB [http://neotechnology.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.upgrade.lucene;
import org.hamcrest.Description;
import org.hamcrest.Matchers;
import org.hamcrest.TypeSafeDiagnosingMatcher;
import org.junit.Rule;
import org.junit.Test;
import org.junit.rules.ExpectedException;
import java.net.URISyntaxException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import java.util.function.Supplier;
import org.neo4j.upgrade.loader.EmbeddedJarLoader;
import org.neo4j.upgrade.loader.JarLoaderSupplier;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
public class LuceneLegacyIndexUpgraderTest
{
@Rule
public ExpectedException expectedException = ExpectedException.none();
@Test
public void failOnFileMigration() throws Exception
{
Path indexFolder = createPathForResource("indexPretender.txt");
expectedException.expect( IllegalArgumentException.class );
new LuceneLegacyIndexUpgrader(indexFolder);
}
@Test
public void ignoreFoldersWithoutIndexes() throws URISyntaxException, LegacyIndexMigrationException
{
Path indexFolder = createPathForResource("notIndexFolder");
TrackingLuceneLegacyIndexUpgrader indexUpgrader = new TrackingLuceneLegacyIndexUpgrader( indexFolder );
indexUpgrader.upgradeIndexes();
assertTrue(indexUpgrader.getMigratedIndexes().isEmpty());
}
@Test
public void migrateValidIndexes() throws URISyntaxException, LegacyIndexMigrationException
{
Path indexFolder = createPathForResource("indexFolder");
TrackingLuceneLegacyIndexUpgrader indexUpgrader = new TrackingLuceneLegacyIndexUpgrader( indexFolder );
indexUpgrader.upgradeIndexes();
assertThat(indexUpgrader.getMigratedIndexes(), Matchers.contains("index1", "index2"));
}
@Test
public void pointIncorrectIndexOnMigrationFailure() throws URISyntaxException, LegacyIndexMigrationException
{
Path indexFolder = createPathForResource("indexFolder");
TrackingLuceneLegacyIndexUpgrader indexUpgrader = new TrackingLuceneLegacyIndexUpgrader( indexFolder, true );
expectedException.expect( LegacyIndexMigrationException.class );
expectedException.expect( new LegacyIndexMigrationExceptionBaseMatcher("index1", "index2") );
indexUpgrader.upgradeIndexes();
}
private Path createPathForResource(String resourceName) throws URISyntaxException
{
return Paths.get( getClass().getClassLoader().getResource( resourceName ).toURI() );
}
private class LegacyIndexMigrationExceptionBaseMatcher extends TypeSafeDiagnosingMatcher<LegacyIndexMigrationException>
{
private String[] failedIndexNames;
public LegacyIndexMigrationExceptionBaseMatcher(String... failedIndexNames)
{
this.failedIndexNames = failedIndexNames;
}
@Override
public void describeTo( Description description )
{
description.appendText( "Failed index should be one of:" )
.appendText( Arrays.toString( failedIndexNames ) );
}
@Override
protected boolean matchesSafely( LegacyIndexMigrationException item, Description mismatchDescription )
{
String brokendIndexName = item.getFailedIndexName();
boolean matched = Arrays.asList(failedIndexNames).contains( brokendIndexName );
if (!matched)
{
mismatchDescription.appendText( "Failed index is: " ).appendText( brokendIndexName );
}
return matched;
}
}
private class TrackingLuceneLegacyIndexUpgrader extends LuceneLegacyIndexUpgrader
{
private Set<String> migratedIndexes = new HashSet<>( );
private boolean failIndexUpgrade;
public TrackingLuceneLegacyIndexUpgrader( Path indexRootPath)
{
this ( indexRootPath, false );
}
public TrackingLuceneLegacyIndexUpgrader( Path indexRootPath, boolean failIndexUpgrade )
{
super( indexRootPath );
this.failIndexUpgrade = failIndexUpgrade;
}
@Override
IndexUpgraderWrapper createIndexUpgrader( String[] jars )
{
return new IndexUpgraderWrapperStub( JarLoaderSupplier.of( jars ), migratedIndexes, failIndexUpgrade );
}
public Set<String> getMigratedIndexes()
{
return migratedIndexes;
}
}
private class IndexUpgraderWrapperStub extends IndexUpgraderWrapper
{
private Set<String> migratedIndexes;
private boolean failIndexUpgrade;
public IndexUpgraderWrapperStub( Supplier<EmbeddedJarLoader> jarLoaderSupplier, Set<String> migratedIndexes,
boolean failIndexUpgrade )
{
super( jarLoaderSupplier );
this.migratedIndexes = migratedIndexes;
this.failIndexUpgrade = failIndexUpgrade;
}
@Override
public void upgradeIndex( Path indexPath ) throws Throwable
{
if (failIndexUpgrade)
{
throw new RuntimeException( "Fail index migration: " + indexPath );
}
migratedIndexes.add( indexPath.getFileName().toString() );
}
}
}