mapreduce/src/test/mapred/org/apache/hadoop/mapreduce/lib/input/TestFileInputFormat.java

/**
 * 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.hadoop.mapreduce.lib.input;

import java.io.IOException;
import java.util.Arrays;

import org.junit.Test;
import static org.junit.Assert.*;

import static org.mockito.Mockito.*;
import static org.apache.hadoop.test.MockitoMaker.*;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapreduce.Job;

public class TestFileInputFormat {

  @Test
  public void testAddInputPath() throws IOException {
    final Configuration conf = new Configuration();
    conf.set("fs.default.name", "s3://abc:xyz@hostname/");
    final Job j = new Job(conf);
    j.getConfiguration().set("fs.default.name", "s3://abc:xyz@hostname/");

    //setup default fs
    final FileSystem defaultfs = FileSystem.get(conf);
    System.out.println("defaultfs.getUri() = " + defaultfs.getUri());

    {
      //test addInputPath
      final Path original = new Path("file:/foo");
      System.out.println("original = " + original);
      FileInputFormat.addInputPath(j, original);
      final Path[] results = FileInputFormat.getInputPaths(j);
      System.out.println("results = " + Arrays.asList(results));
      assertEquals(1, results.length);
      assertEquals(original, results[0]);
    }

    {
      //test setInputPaths
      final Path original = new Path("file:/bar");
      System.out.println("original = " + original);
      FileInputFormat.setInputPaths(j, original);
      final Path[] results = FileInputFormat.getInputPaths(j);
      System.out.println("results = " + Arrays.asList(results));
      assertEquals(1, results.length);
      assertEquals(original, results[0]);
    }
  }

  @Test
  public void testNumInputFiles() throws Exception {
    Configuration conf = spy(new Configuration());
    Job job = make(stub(Job.class).returning(conf).from.getConfiguration());
    FileStatus stat = make(stub(FileStatus.class).returning(0L).from.getLen());
    TextInputFormat ispy = spy(new TextInputFormat());
    doReturn(Arrays.asList(stat)).when(ispy).listStatus(job);

    ispy.getSplits(job);
    verify(conf).setLong(FileInputFormat.NUM_INPUT_FILES, 1);
  }
}