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StoreVersionCheckTest.java
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StoreVersionCheckTest.java
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/*
* Copyright (c) 2002-2016 "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.kernel.impl.storemigration;
import org.junit.Rule;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.io.OutputStream;
import org.neo4j.io.fs.DefaultFileSystemAbstraction;
import org.neo4j.io.fs.FileSystemAbstraction;
import org.neo4j.io.pagecache.PageCache;
import org.neo4j.kernel.impl.store.MetaDataStore;
import org.neo4j.string.UTF8;
import org.neo4j.test.PageCacheRule;
import org.neo4j.test.TargetDirectory;
import org.neo4j.test.TargetDirectory.TestDirectory;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertNull;
import static org.junit.Assert.assertTrue;
public class StoreVersionCheckTest
{
private final FileSystemAbstraction fs = new DefaultFileSystemAbstraction();
@Rule
public final TestDirectory directory = TargetDirectory.testDirForTest( getClass() );
@Rule
public final PageCacheRule pageCacheRule = new PageCacheRule();
@Test
public void shouldFailIfFileDoesNotExist()
{
// given
File missingFile = new File( directory.directory(), "missing-file" );
PageCache pageCache = pageCacheRule.getPageCache( fs );
StoreVersionCheck storeVersionCheck = new StoreVersionCheck( pageCache );
// when
StoreVersionCheck.Result result = storeVersionCheck.hasVersion( missingFile, "version" );
// then
assertFalse( result.outcome.isSuccessful() );
assertEquals( StoreVersionCheck.Result.Outcome.missingStoreFile, result.outcome );
assertNull( result.actualVersion );
}
@Test
public void shouldReportShortFileDoesNotHaveSpecifiedVersion() throws IOException
{
// given
File shortFile = fileContaining( fs, "nothing interesting" );
StoreVersionCheck storeVersionCheck = new StoreVersionCheck( pageCacheRule.getPageCache( fs ) );
// when
StoreVersionCheck.Result result = storeVersionCheck.hasVersion( shortFile, "version" );
// then
assertFalse( result.outcome.isSuccessful() );
assertEquals( StoreVersionCheck.Result.Outcome.storeVersionNotFound, result.outcome );
assertNull( result.actualVersion );
}
@Test
public void shouldReportFileWithIncorrectVersion() throws IOException
{
// given
File neoStore = emptyFile( fs );
long v1 = MetaDataStore.versionStringToLong( "V1" );
PageCache pageCache = pageCacheRule.getPageCache( fs );
MetaDataStore.setRecord( pageCache, neoStore, MetaDataStore.Position.STORE_VERSION, v1 );
StoreVersionCheck storeVersionCheck = new StoreVersionCheck( pageCache );
// when
StoreVersionCheck.Result result = storeVersionCheck.hasVersion( neoStore, "V2" );
// then
assertFalse( result.outcome.isSuccessful() );
assertEquals( StoreVersionCheck.Result.Outcome.unexpectedStoreVersion, result.outcome );
assertEquals( "V1", result.actualVersion );
}
@Test
public void shouldReportFileWithCorrectVersion() throws IOException
{
// given
File neoStore = emptyFile( fs );
long v1 = MetaDataStore.versionStringToLong( "V1" );
PageCache pageCache = pageCacheRule.getPageCache( fs );
MetaDataStore.setRecord( pageCache, neoStore, MetaDataStore.Position.STORE_VERSION, v1 );
StoreVersionCheck storeVersionCheck = new StoreVersionCheck( pageCache );
// when
StoreVersionCheck.Result result = storeVersionCheck.hasVersion( neoStore, "V1" );
// then
assertTrue( result.outcome.isSuccessful() );
assertEquals( StoreVersionCheck.Result.Outcome.ok, result.outcome );
assertNull( result.actualVersion );
}
private File emptyFile( FileSystemAbstraction fs ) throws IOException
{
File shortFile = directory.file( "empty" );
fs.deleteFile( shortFile );
fs.create( shortFile );
return shortFile;
}
private File fileContaining( FileSystemAbstraction fs, String content ) throws IOException
{
File shortFile = directory.file( "file" );
fs.deleteFile( shortFile );
try ( OutputStream outputStream = fs.openAsOutputStream( shortFile, false ) )
{
outputStream.write( UTF8.encode( content ) );
return shortFile;
}
}
}