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DefaultFileSystemAbstractionTest.java
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DefaultFileSystemAbstractionTest.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.io.fs;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import java.util.UUID;
import org.neo4j.graphdb.mockfs.CloseTrackingFileSystem;
import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertSame;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.assertTrue;
import static org.junit.Assert.fail;
public class DefaultFileSystemAbstractionTest
{
private DefaultFileSystemAbstraction defaultFileSystemAbstraction;
private File path;
@Before
public void before() throws Exception
{
path = new File( "target/" + UUID.randomUUID() );
defaultFileSystemAbstraction = new DefaultFileSystemAbstraction();
}
@After
public void tearDown() throws IOException
{
defaultFileSystemAbstraction.close();
}
@Test
public void shouldCreatePath() throws Exception
{
defaultFileSystemAbstraction.mkdirs( path );
assertThat( path.exists(), is( true ) );
}
@Test
public void shouldCreateDeepPath() throws Exception
{
path = new File( path, UUID.randomUUID() + "/" + UUID.randomUUID() );
defaultFileSystemAbstraction.mkdirs( path );
assertThat( path.exists(), is( true ) );
}
@Test
public void shouldCreatePathThatAlreadyExists() throws Exception
{
assertTrue( path.mkdir() );
defaultFileSystemAbstraction.mkdirs( path );
assertThat( path.exists(), is( true ) );
}
@Test
public void shouldCreatePathThatPointsToFile() throws Exception
{
assertTrue( path.mkdir() );
path = new File( path, "some_file" );
assertTrue( path.createNewFile() );
defaultFileSystemAbstraction.mkdirs( path );
assertThat( path.exists(), is( true ) );
}
@Test
public void shouldFailGracefullyWhenPathCannotBeCreated() throws Exception
{
path = new File( "target/" + UUID.randomUUID() )
{
@Override
public boolean mkdirs()
{
return false;
}
};
try
{
defaultFileSystemAbstraction.mkdirs( path );
fail();
}
catch ( IOException e )
{
assertThat( path.exists(), is( false ) );
assertThat( e.getMessage(), is( String.format( DefaultFileSystemAbstraction
.UNABLE_TO_CREATE_DIRECTORY_FORMAT, path ) ) );
}
}
@Test
public void closeThirdPartyFileSystemsOnClose() throws IOException
{
CloseTrackingFileSystem closeTrackingFileSystem = new CloseTrackingFileSystem();
CloseTrackingFileSystem fileSystem = defaultFileSystemAbstraction
.getOrCreateThirdPartyFileSystem( CloseTrackingFileSystem.class,
thirdPartyFileSystemClass -> closeTrackingFileSystem );
assertSame( closeTrackingFileSystem, fileSystem );
assertFalse( closeTrackingFileSystem.isClosed() );
defaultFileSystemAbstraction.close();
assertTrue( closeTrackingFileSystem.isClosed() );
}
}