FileSourceTest.java

/*
 * Copyright 2013-2014 the original author or authors.
 *
 * Licensed 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.springframework.xd.integration.test;

import java.util.UUID;

import org.junit.Test;


/**
 * Verifies that the FileSource and TailSource can retrieve data from their associated file.
 *
 * @author Glenn Renfro
 */
public class FileSourceTest extends AbstractIntegrationTest {

	/**
	 * Evaluates whether the file source (poller) will retrieve the specified file when it is added to the monitored
	 * directory.
	 *
	 */
	@Test
	public void testFileSource() {
		String data = UUID.randomUUID().toString();
		String sourceDir = "/tmp/xd/" + UUID.randomUUID().toString();
		String fileName = UUID.randomUUID().toString() + ".out";
		stream(sources.file(sourceDir, fileName).label("filein") + XD_DELIMITER
				+ sinks.file().label("fileout"));
		setupSourceDataFiles(sourceDir, fileName, data);
		waitForXD();
		assertValid(data, sinks.file());
	}

	/**
	 * Evaluates whether the tail source (poller) will retrieve the results when the specified file is updated.
	 *
	 */
	@Test
	public void testTailSource() {
		String data = UUID.randomUUID().toString();
		String sourceDir = "/tmp/xd";
		String fileName = UUID.randomUUID().toString() + ".out";

		final String APPEND_TEXT = ".append";
		stream(sources.tail(100, sourceDir + "/" + fileName) + XD_DELIMITER
				+ sinks.file());
		setupSourceDataFiles(sourceDir, fileName, data);
		appendDataToSourceTestFile(sourceDir, fileName, APPEND_TEXT);
		assertValid(data + APPEND_TEXT, sinks.file());
	}
}