branch-2.0.4-alpha/hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/security/TestUserFromEnv.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.security;

import java.io.IOException;
import org.junit.Assert;
import org.junit.Test;

public class TestUserFromEnv {

  @Test
  public void testUserFromEnvironment() throws IOException {
    System.setProperty(UserGroupInformation.HADOOP_USER_NAME, "randomUser");
    Assert.assertEquals("randomUser", UserGroupInformation.getLoginUser()
        .getUserName());
  }
}