/*
 * 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.flink.streaming.api.functions.source;

import org.apache.flink.api.java.tuple.Tuple3;
import org.apache.flink.streaming.api.watermark.Watermark;

import org.junit.Test;

/**
 * Tests for the {@link org.apache.flink.streaming.api.functions.source.FileMonitoringFunction}.
 */
public class FileMonitoringFunctionTest {

	@Test
	public void testForEmptyLocation() throws Exception {
		final FileMonitoringFunction fileMonitoringFunction
				= new FileMonitoringFunction("?non-existing-path", 1L, FileMonitoringFunction.WatchType.ONLY_NEW_FILES);

		new Thread() {
			@Override
			public void run() {
				try {
					Thread.sleep(1000L);
				} catch (InterruptedException e) {
					e.printStackTrace();
				}
				fileMonitoringFunction.cancel();
			}
		}.start();

		fileMonitoringFunction.run(
				new SourceFunction.SourceContext<Tuple3<String, Long, Long>>() {

					@Override
					public void collect(Tuple3<String, Long, Long> element) {}

					@Override
					public void collectWithTimestamp(Tuple3<String, Long, Long> element, long timestamp) {}

					@Override
					public void emitWatermark(Watermark mark) {}

					@Override
					public void markAsTemporarilyIdle() {}

					@Override
					public Object getCheckpointLock() { return null; }

					@Override
					public void close() {}
				});
	}
}