/*
    * Copyright 2002-2008 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.springframework.beans.factory.parsing;
  
  import org.junit.Test;
  
  import static org.junit.Assert.*;
  
  /**
   * @author Rick Evans
   * @author Chris Beams
   */
  public final class NullSourceExtractorTests {
  
  	@Test
  	public void testPassThroughContract() throws Exception {
  		Object source  = new Object();
  		Object extractedSource = new NullSourceExtractor().extractSource(source, null);
  		assertNull("The contract of NullSourceExtractor states that the extraction *always* return null", extractedSource);
  	}
  
  	@Test
  	public void testPassThroughContractEvenWithNull() throws Exception {
  		Object extractedSource = new NullSourceExtractor().extractSource(null, null);
  		assertNull("The contract of NullSourceExtractor states that the extraction *always* return null", extractedSource);
  	}
  
  }