fe/src/test/java/org/apache/impala/service/JniFrontendTest.java

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package org.apache.impala.service;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.security.JniBasedUnixGroupsMappingWithFallback;
import org.apache.hadoop.security.JniBasedUnixGroupsNetgroupMappingWithFallback;
import org.apache.hadoop.security.ShellBasedUnixGroupsMapping;
import org.apache.hadoop.security.ShellBasedUnixGroupsNetgroupMapping;
import org.apache.impala.common.ImpalaException;
import org.junit.Test;

import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;

public class JniFrontendTest {
  @Test
  public void testCheckGroupsMappingProvider() throws ImpalaException {
    Configuration conf = new Configuration();
    conf.set(CommonConfigurationKeys.HADOOP_SECURITY_GROUP_MAPPING,
        JniBasedUnixGroupsMappingWithFallback.class.getName());
    assertTrue(JniFrontend.checkGroupsMappingProvider(conf).isEmpty());

    conf = new Configuration();
    conf.set(CommonConfigurationKeys.HADOOP_SECURITY_GROUP_MAPPING,
        ShellBasedUnixGroupsMapping.class.getName());
    assertEquals(JniFrontend.checkGroupsMappingProvider(conf),
        String.format("Hadoop groups mapping provider: %s is known to be problematic. " +
            "Consider using: %s instead.",
            ShellBasedUnixGroupsMapping.class.getName(),
            JniBasedUnixGroupsMappingWithFallback.class.getName()));

    conf = new Configuration();
    conf.set(CommonConfigurationKeys.HADOOP_SECURITY_GROUP_MAPPING,
        ShellBasedUnixGroupsNetgroupMapping.class.getName());
    assertEquals(JniFrontend.checkGroupsMappingProvider(conf),
        String.format("Hadoop groups mapping provider: %s is known to be problematic. " +
            "Consider using: %s instead.",
            ShellBasedUnixGroupsNetgroupMapping.class.getName(),
            JniBasedUnixGroupsNetgroupMappingWithFallback.class.getName()));
  }
}