/*
    * Copyright 2002-2011 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.context.annotation;
  
  import org.junit.Test;
  
  import org.springframework.context.annotation.componentscan.cycle.left.LeftConfig;
  import org.springframework.context.annotation.componentscan.level1.Level1Config;
  import org.springframework.context.annotation.componentscan.level2.Level2Config;
  import org.springframework.context.annotation.componentscan.level3.Level3Component;
  
  import static org.hamcrest.CoreMatchers.*;
  import static org.junit.Assert.*;
  
  /**
   * Tests ensuring that configuration classes marked with @ComponentScan
   * may be processed recursively
   *
   * @author Chris Beams
   * @since 3.1
   */
  public class ComponentScanAnnotationRecursionTests {
  
  	@Test
  	public void recursion() {
  		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
  		ctx.register(Level1Config.class);
  		ctx.refresh();
  
  		// assert that all levels have been detected
  		ctx.getBean(Level1Config.class);
  		ctx.getBean(Level2Config.class);
  		ctx.getBean(Level3Component.class);
  
  		// assert that enhancement is working
  		assertThat(ctx.getBean("level1Bean"), sameInstance(ctx.getBean("level1Bean")));
  		assertThat(ctx.getBean("level2Bean"), sameInstance(ctx.getBean("level2Bean")));
  	}
  
  	public void evenCircularScansAreSupported() {
  		AnnotationConfigApplicationContext ctx = new AnnotationConfigApplicationContext();
  		ctx.register(LeftConfig.class); // left scans right, and right scans left
  		ctx.refresh();
  		ctx.getBean("leftConfig");      // but this is handled gracefully
  		ctx.getBean("rightConfig");     // and beans from both packages are available
  	}
  
  }