testexists.java

来自「一个关于java 的常用工具包」· Java 代码 · 共 96 行

package org.jutiltest.java.collections;
import org.jutil.java.collections.Exists;
import org.jutil.junit.JutilTest;
import org.jutil.junit.CVSRevision;
import org.jutil.java.collections.Collections;
import junit.framework.*;
import java.util.Vector;
import java.util.Collection;
import java.util.Iterator;
import java.util.Enumeration;
import java.util.Set;
import java.util.HashSet;
import java.util.ArrayList;

/* 
 * @path    $Source: /cvsroot/org-jutil/jutil.org/src/org/jutiltest/java/collections/TestExists.java,v $
 * @date    $Date: 2002/07/21 18:59:17 $
 * @state   $State: Exp $
 * @author  Marko van Dooren
 * @release $Name:  $
 */

public class TestExists extends JutilTest {

  private HashSet $hashSet;

  public TestExists(String name) {
    super(name, new CVSRevision("1.17"));
  }
  
  public void setUp() {
    $hashSet = new HashSet();
    for(int i=0; i<10; i++) {
      $hashSet.add(new Integer(i));
    }
    
  }
  
  public void testExists() {
    Collection clone = new Vector($hashSet);
    boolean bool = new Exists() {
                     public boolean criterion(Object element) {
                        return ((Integer)element).intValue() == 7;
                     }
                   }.in($hashSet);
    assertTrue(bool);
    assertTrue(Collections.identical($hashSet,clone));
    bool = new Exists() {
             public boolean criterion(Object element) {
               return ((Integer)element).intValue() == 17;
             }
           }.in($hashSet);
    assertTrue(! bool);
    assertTrue(Collections.identical($hashSet,clone));
    Collection nullCollection = null;
    // shouldn't throw an exception
    bool = new Exists() {
             public boolean criterion(Object element) {
               return ((Integer)element).intValue() == 17;
             }
    }.in(nullCollection);
    assertTrue(! bool);
    Vector stupidVector = new Vector();
    for(int i=0;i<37;i++) {
      stupidVector.add(null);
    }
    // just for fun a vector containing only null elements.
    bool = new Exists() {
             public boolean criterion(Object element) {
               return element == new Object();
             }
    }.in(stupidVector);
    // an empty collection
    bool = new Exists() {
             public boolean criterion(Object element) {
               return ((Integer)element).intValue() == 17;
             }
    }.in(new ArrayList());
    assertTrue(! bool);    
  }
}
/*
 * <copyright>Copyright (C) 1997-2001. This software is copyrighted by 
 * the people and entities mentioned after the "@author" tags above, on 
 * behalf of the JUTIL.ORG Project. The copyright is dated by the dates 
 * after the "@date" tags above. All rights reserved.
 * This software is published under the terms of the JUTIL.ORG Software
 * License version 1.1 or later, a copy of which has been included with
 * this distribution in the LICENSE file, which can also be found at
 * http://org-jutil.sourceforge.net/LICENSE. This software is distributed 
 * WITHOUT ANY WARRANTY; without even the implied warranty of 
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 
 * See the JUTIL.ORG Software License for more details. For more information,
 * please see http://org-jutil.sourceforge.net/</copyright>
 */