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

import org.junit.After;
import org.junit.AfterClass;
import org.junit.BeforeClass;

/**
 * Base Unit test class that manages the Frontend fixture
 * to initialize and shut down the front-end, and to remove any
 * temporary tables created by the test. Derive tests from this class
 * if the test does anything "special." Derive from
 * {@link FrontendTestBase} for routine tests that can leverage the
 * many default functions available.
 *
 * A special test is one that:
 *
 * * Needs specialized query options.
 * * Needs specialized query handling, such as inspecting bits of the
 *   AST, decorated AST or query plan.
 *
 * In these cases, use the fixtures directly as they provide more control
 * than do the generic methods in FrontendTestBase.
 */
public abstract class AbstractFrontendTest {
  protected static FrontendFixture feFixture_ = FrontendFixture.instance();

  @BeforeClass
  public static void setUp() throws Exception {
    feFixture_.setUp();
  }

  @AfterClass
  public static void cleanUp() throws Exception {
    feFixture_.cleanUp();
  }

  @After
  public void tearDown() {
    feFixture_.tearDown();
  }
}