/*
* 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.runtime.fs;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.fail;
import java.io.File;
import java.io.PrintWriter;
import org.apache.flink.core.fs.FSDataInputStream;
import org.apache.flink.core.fs.Path;
import org.apache.flink.core.fs.local.LocalFileSystem;
import org.apache.flink.runtime.testutils.CommonTestUtils;
import org.junit.Test;
/**
* This class tests the functionality of the LineReader class using a local filesystem.
*
*/
public class LineReaderTest {
/**
* This test tests the LineReader. So far only under usual conditions.
*/
@Test
public void testLineReader() {
final File testfile = new File(CommonTestUtils.getTempDir() + File.separator
+ CommonTestUtils.getRandomFilename());
final Path pathtotestfile = new Path(testfile.toURI().getPath());
try {
PrintWriter pw = new PrintWriter(testfile, "UTF8");
for (int i = 0; i < 100; i++) {
pw.append("line\n");
}
pw.close();
LocalFileSystem lfs = new LocalFileSystem();
FSDataInputStream fis = lfs.open(pathtotestfile);
// first, we test under "usual" conditions
final LineReader lr = new LineReader(fis, 0, testfile.length(), 256);
byte[] buffer;
int linecount = 0;
while ((buffer = lr.readLine()) != null) {
assertEquals(new String(buffer, "UTF8"), "line");
linecount++;
}
assertEquals(linecount, 100);
// the linereader can not handle situations with larger length than the total file...
} catch (Exception e) {
fail(e.toString());
e.printStackTrace();
} finally {
testfile.delete();
}
}
}