branch-2.0.4-alpha/hadoop-tools/hadoop-streaming/src/test/java/org/apache/hadoop/streaming/TestStreamingCounters.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.streaming;

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

import java.io.IOException;

import org.apache.hadoop.mapred.Counters;
import org.apache.hadoop.mapred.Counters.Counter;
import org.apache.hadoop.mapred.Counters.Group;

/**
 * This class tests streaming counters in MapReduce local mode.
 */
public class TestStreamingCounters extends TestStreaming {
  public TestStreamingCounters() throws IOException {
    super();
  }

  @Test
  public void testCommandLine() throws Exception {
    super.testCommandLine();
    validateCounters();
  }
  
  private void validateCounters() throws IOException {
    Counters counters = job.running_.getCounters();
    assertNotNull("Counters", counters);
    Group group = counters.getGroup("UserCounters");
    assertNotNull("Group", group);
    Counter counter = group.getCounterForName("InputLines");
    assertNotNull("Counter", counter);
    assertEquals(3, counter.getCounter());
  }
}