001/*
002 * Licensed to the Apache Software Foundation (ASF) under one
003 * or more contributor license agreements.  See the NOTICE file
004 * distributed with this work for additional information
005 * regarding copyright ownership.  The ASF licenses this file
006 * to you under the Apache License, Version 2.0 (the
007 * "License"); you may not use this file except in compliance
008 * with the License.  You may obtain a copy of the License at
009 *
010 *     http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018package org.apache.hadoop.hbase.util;
019
020import static org.junit.Assert.assertEquals;
021import static org.junit.Assert.assertNotNull;
022
023import java.io.PrintStream;
024import java.util.LinkedList;
025import java.util.List;
026import org.apache.hadoop.hbase.HBaseClassTestRule;
027import org.apache.hadoop.hbase.master.cleaner.TimeToLiveLogCleaner;
028import org.apache.hadoop.hbase.testclassification.MiscTests;
029import org.apache.hadoop.hbase.testclassification.SmallTests;
030import org.junit.ClassRule;
031import org.junit.Test;
032import org.junit.experimental.categories.Category;
033
034@Category({ MiscTests.class, SmallTests.class })
035public class TestHBaseConfTool {
036
037  @ClassRule
038  public static final HBaseClassTestRule CLASS_RULE =
039    HBaseClassTestRule.forClass(TestHBaseConfTool.class);
040
041  @Test
042  public void testHBaseConfTool() {
043    String[] args = { TimeToLiveLogCleaner.TTL_CONF_KEY };
044    PrintStream stdout = System.out;
045
046    try {
047      DummyPrintStream printStream = new DummyPrintStream(System.out);
048      System.setOut(printStream);
049
050      HBaseConfTool.main(args);
051
052      List<String> printedLines = printStream.getPrintedLines();
053      assertNotNull(printedLines);
054      assertEquals(1, printedLines.size());
055      assertEquals(String.valueOf(TimeToLiveLogCleaner.DEFAULT_TTL), printedLines.get(0));
056    } finally {
057      // reset to standard output
058      System.setOut(stdout);
059    }
060  }
061
062  static class DummyPrintStream extends PrintStream {
063
064    private List<String> printedLines = new LinkedList<>();
065
066    public DummyPrintStream(PrintStream printStream) {
067      super(printStream);
068    }
069
070    @Override
071    public void println(String line) {
072      printedLines.add(line);
073      super.println(line);
074    }
075
076    public List<String> getPrintedLines() {
077      return printedLines;
078    }
079  }
080}