fe/src/test/java/org/apache/impala/util/AuthorizationUtilTest.java

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//   http://www.apache.org/licenses/LICENSE-2.0
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package org.apache.impala.util;

import org.apache.impala.authorization.AuthorizationFactory;
import org.apache.impala.authorization.ranger.RangerAuthorizationFactory;
import org.apache.impala.authorization.sentry.SentryAuthorizationFactory;
import org.apache.impala.service.BackendConfig;
import org.apache.impala.thrift.TBackendGflags;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import org.junit.Test;

import static org.junit.Assert.assertEquals;

public class AuthorizationUtilTest {
  private static TBackendGflags origFlags;

  @BeforeClass
  public static void setup() {
    // since some test cases will need to modify the (static)
    // be flags, we need to save the original values so they
    // can be restored and not break other tests
    if (BackendConfig.INSTANCE == null) {
      BackendConfig.create(new TBackendGflags());
    }
    origFlags = BackendConfig.INSTANCE.getBackendCfg();
  }

  @AfterClass
  public static void teardown() {
    BackendConfig.create(origFlags);
  }

  private static BackendConfig authCfg(String authorization_factory_class,
      String authorization_provider) {
    final TBackendGflags stubCfg = new TBackendGflags();

    stubCfg.setAuthorization_factory_class(authorization_factory_class);
    stubCfg.setAuthorization_provider(authorization_provider);
    BackendConfig.create(stubCfg);
    return BackendConfig.INSTANCE;
  }

  private static BackendConfig authCfg(
      Class<? extends AuthorizationFactory> authorization_factory_class,
      String authorization_provider) {
    return authCfg(authorization_factory_class.getCanonicalName(),
        authorization_provider);
  }

  @Test
  public void testAuthorizationProviderFlag()
      throws Exception {
    // Test policy factory selection based on provider
    assertEquals(SentryAuthorizationFactory.class.getCanonicalName(),
        AuthorizationUtil.authzFactoryClassNameFrom(authCfg("", "sentry")));

    assertEquals(RangerAuthorizationFactory.class.getCanonicalName(),
        AuthorizationUtil.authzFactoryClassNameFrom(authCfg("", "ranger")));

    // Policy selection factory takes precedence over provider name
    assertEquals(SentryAuthorizationFactory.class.getCanonicalName(),
        AuthorizationUtil.authzFactoryClassNameFrom(
            authCfg(SentryAuthorizationFactory.class, "ranger")));

    assertEquals(RangerAuthorizationFactory.class.getCanonicalName(),
        AuthorizationUtil.authzFactoryClassNameFrom(
            authCfg(RangerAuthorizationFactory.class, "sentry")));

    assertEquals(SentryAuthorizationFactory.class.getCanonicalName(),
        AuthorizationUtil.authzFactoryClassNameFrom(
            authCfg(SentryAuthorizationFactory.class, "sentry")));

    assertEquals(RangerAuthorizationFactory.class.getCanonicalName(),
        AuthorizationUtil.authzFactoryClassNameFrom(
            authCfg(RangerAuthorizationFactory.class, "ranger")));
  }
}