import junit.framework.TestCase;
import listFW.*;
import listFW.visitor.*;
import listFW.factory.*;

public class Test_HW07 extends TestCase {
  /**
   * 
   * Tests the CopyFac visitor using all combinations of CompositeListFactory   
   * and InnerCompListFact to make the original and generated lists.  
   */  
  public void test_CopyFac() {    
    test_CopyFac_help(CompositeListFactory.Singleton, CompositeListFactory.Singleton);    
    test_CopyFac_help(InnerCompListFact.Singleton, InnerCompListFact.Singleton);    
    test_CopyFac_help(CompositeListFactory.Singleton, InnerCompListFact.Singleton);    
    test_CopyFac_help(InnerCompListFact.Singleton, CompositeListFactory.Singleton);      
  }    
  /**  
   * 
   * Test code used in conjunction with test_CopyFac() that is independent of which   
   * factory is being used.   
   * Notes:  The name of this method begins with "test" because this way JUnit will identifiy    
   * any error as occurring in a specific line of this method, rather than in the calling   
   * line in test_CopyFac. Also, the error strings below explicitly include the toString() of the   
   * factories being used so that the parameters under which this test code was called can be    
   * readily identified.  This way one can tell when one factory works but another does not.   
   * @param fac1 the factory used to make the original list.   
   * @param fac2 the factory used to make the copy   
   */  
  private void test_CopyFac_help(IListFactory fac1, IListFactory fac2) {    
    IList l = fac1.makeEmptyList();   
    IListAlgo cf = new CopyFac(fac2);    
    assertEquals("Empty "+fac1+" list: CopyFac using "+fac2, "()", l.execute(cf).toString());      
    l = fac1.makeNEList("a", l);    
    assertEquals("(a) from "+fac1+": CopyFac using "+fac2, "(a)", l.execute(cf).toString());      
    l = fac1.makeNEList("b", l);    
    assertEquals("(b, a) from "+fac1+": CopyFac using "+fac2, "(b, a)", l.execute(cf).toString());      
  }
}