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RestartableFileSystemWatcherTest.java
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RestartableFileSystemWatcherTest.java
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/*
* Copyright (c) 2002-2017 "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.watcher;
import org.junit.Test;
import java.io.File;
import java.io.IOException;
import org.neo4j.io.fs.watcher.resource.WatchedResource;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.times;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;
public class RestartableFileSystemWatcherTest
{
private FileWatcher delegate = mock( FileWatcher.class );
private RestartableFileSystemWatcher watcher = new RestartableFileSystemWatcher( delegate );
@Test
public void delegateListenersCallToRealWatcher()
{
FileWatchEventListener listener = mock( FileWatchEventListener.class );
watcher.addFileWatchEventListener( listener );
verify( delegate ).addFileWatchEventListener( listener );
watcher.removeFileWatchEventListener( listener );
verify( delegate ).removeFileWatchEventListener( listener );
}
@Test
public void closeDelegateOnClose() throws IOException
{
watcher.close();
verify( delegate ).close();
}
@Test
public void startStopFileWatchingCycle() throws IOException, InterruptedException
{
File file1 = mock( File.class );
File file2 = mock( File.class );
WatchedResource resource1 = mock( WatchedResource.class );
WatchedResource resource2 = mock( WatchedResource.class );
watcher.watch( file1 );
watcher.watch( file2 );
when( delegate.watch( file1 ) ).thenReturn( resource1 );
when( delegate.watch( file2 ) ).thenReturn( resource2 );
int invocations = 100;
for ( int i = 0; i < invocations; i++ )
{
startStopWatching();
}
verify( delegate, times( invocations ) ).watch( file1 );
verify( delegate, times( invocations ) ).watch( file2 );
verify( delegate, times( invocations ) ).startWatching();
verify( delegate, times( invocations ) ).stopWatching();
verify( resource1, times( invocations ) ).close();
verify( resource2, times( invocations ) ).close();
}
private void startStopWatching() throws InterruptedException
{
watcher.startWatching();
watcher.stopWatching();
}
}