/**
 * 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.mapred;

import static org.mockito.Matchers.any;
import static org.mockito.Mockito.when;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.util.ExitUtil;
import org.apache.hadoop.util.ExitUtil.ExitException;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.runners.MockitoJUnitRunner;

@RunWith(MockitoJUnitRunner.class)
public class TestTask {
  @Mock
  private TaskUmbilicalProtocol umbilical;

  @Mock
  private AMFeedback feedback;

  private Task task;

  @Before
  public void setup() {
    task = new StubTask();
    ExitUtil.disableSystemExit();
  }

  @Test
  public void testStatusUpdateDoesNotExitInUberMode() throws Exception {
    setupTest(true);

    task.statusUpdate(umbilical);
  }

  @Test(expected = ExitException.class)
  public void testStatusUpdateExitsInNonUberMode() throws Exception {
    setupTest(false);

    task.statusUpdate(umbilical);
  }

  private void setupTest(boolean uberized)
      throws IOException, InterruptedException {
    Configuration conf = new Configuration(false);
    conf.setBoolean("mapreduce.task.uberized", uberized);
    task.setConf(conf);
    when(umbilical.statusUpdate(any(TaskAttemptID.class),
        any(TaskStatus.class))).thenReturn(feedback);

    // to avoid possible infinite loop
    when(feedback.getTaskFound()).thenReturn(false, true);
  }

  public class StubTask extends Task {
    @Override
    public void run(JobConf job, TaskUmbilicalProtocol umbilical)
        throws IOException, ClassNotFoundException, InterruptedException {
      // nop
    }

    @Override
    public boolean isMapTask() {
      return false;
    }
  }
}
