/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.nifi.util.file.monitor;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.io.ByteArrayInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import org.junit.Test;
public class TestSynchronousFileWatcher {
@Test
public void testIt() throws UnsupportedEncodingException, IOException, InterruptedException {
final Path path = Paths.get("target/1.txt");
Files.copy(new ByteArrayInputStream("Hello, World!".getBytes("UTF-8")), path, StandardCopyOption.REPLACE_EXISTING);
final UpdateMonitor monitor = new MD5SumMonitor();
final SynchronousFileWatcher watcher = new SynchronousFileWatcher(path, monitor, 10L);
assertFalse(watcher.checkAndReset());
Thread.sleep(30L);
assertFalse(watcher.checkAndReset());
final FileOutputStream fos = new FileOutputStream(path.toFile());
try {
fos.write("Good-bye, World!".getBytes("UTF-8"));
fos.getFD().sync();
} finally {
fos.close();
}
assertTrue(watcher.checkAndReset());
assertFalse(watcher.checkAndReset());
Thread.sleep(30L);
assertFalse(watcher.checkAndReset());
}
}