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springunit 0.6 » org » springunit » framework » SpringUnitTransactionalTest.java
/*
 * Copyright 2006 the original author or authors.
 *
 * Licensed 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.springunit.framework;

import org.springframework.test.AbstractTransactionalSpringContextTests;

/**
 * Extends Spring's test framework to support transactional data-driven tests.
 * Data-driven tests separate data values from test logic,
 * keeping data values in external files and test logic in Java code.
 * Every descendent of SpringUnitTransactionalTest is required by convention
 * to have a bean called <code><i>Classname</i></code> of type
 * SpringUnitContext, where <code><i>Classname</i></code> is
 * the simple name of the subclass of SpringUnitTransactionalTest.
 * Note that the simple names of subclasses must be unique,
 * that is, they must not be distinguished solely by different
 * package qualifiers.
 * 
 * @author <a href="mailto:ted@velkoff.com">Ted Velkoff</a>
 *
 */
public abstract class SpringUnitTransactionalTest extends AbstractTransactionalSpringContextTests {

  /**
   * Default constructor.
   */
  protected SpringUnitTransactionalTest() {
    this(null);
  }

  /**
   * Constructor with JUnit name.
   * Sets AutowireMode to "by name" (overriding the default, which is "by type").
   * Creates a hierarchy of contexts.
   * @param fName Name of JUnit test
   */
  protected SpringUnitTransactionalTest(String name) {
    super(name);
    setAutowireMode(AUTOWIRE_BY_NAME);
    this.contexts = new HierarchicalSpringUnitContext<SpringUnitTransactionalTest>(getClass());
  }

  /**
   * Return list of file names that the
   * Spring test framework uses in order to create beans for testing.
   * @return Array of string filenames
   */
  protected final String[] getConfigLocations() {
    return this.contexts.getConfigLocations();
  }
  
  /**
   * Search for object identified by <code>key</code>
   * in the hierarchy of contexts.
   * @param key Identifier of data value to find
   * @return Object if found or null
   * @throws Exception if errors occur when using reflection
   * to access the SpringUnitContext for any
   * class in the list
   */
  protected final <T> T getObject(String key) throws Exception {
    return (T)this.contexts.getObject(key, getName(), this);
  }
  
  /**
   * Subclasses should override this method to perform any setup operations,
   * such as populating a database table, <i>within</i> the transaction
   * created by this class.
   * <p><b>NB:</b> Not called if there is no transaction management, due to no
   * transaction manager being provided in the context.<br/>
   * <b>Note:</b> This overriding of <code>onSetUpInTransaction</code>
   * is deprecated in SpringUnit and will be removed in a future release.
   * Subclasses that previously overrode <code>onSetUpInTransactionAtBeginning</code>
   * should instead override this method.
   * @throws Exception simply let any exception propagate
   */
  protected void onSetUpInTransaction() throws Exception {
    onSetUpInTransactionAtBeginning();
  }

  /**
   * @deprecated Subclasses should instead override <code>onSetUpInTransaction</code>
   * directly.
   * This method is maintained for backward compatibility but will be removed
   * in a future release. 
   * @throws Exception
   */
  protected void onSetUpInTransactionAtBeginning() throws Exception {
  }

  /**
   * Calls onTearDownAfterTransactionEnds so that subclasses can
   * insert behavior at conclusion of transaction.
   * The transaction is <i>not open anymore</i> at this point.
   * Follows by calling setDirty so that all beans created
   * from configuration files are refreshed.
   * @throws Exception simply let any exception propagate
   */
  protected final void onTearDownAfterTransaction() throws Exception {
    try {
      onTearDownAfterTransactionEnds();
    }
    finally {
      setDirty();
    }
  }

  /**
   * Subclasses can override this method to perform cleanup here.
   * The transaction is <i>not open anymore</i> at this point.
   * @throws Exception simply let any exception propagate
   */
  protected void onTearDownAfterTransactionEnds() throws Exception {
  }

  /**
   * Container of the hierarchy of contexts for the test.<br/>
   */
  private HierarchicalSpringUnitContext<SpringUnitTransactionalTest> contexts;
  
}
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