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From scolebou...@apache.org
Subject cvs commit: jakarta-commons/collections/src/test/org/apache/commons/collections TestCircularFifoBuffer.java
Date Sat, 26 Apr 2003 15:13:22 GMT
scolebourne    2003/04/26 08:13:22

  Added:       collections/src/test/org/apache/commons/collections
                        TestCircularFifoBuffer.java
  Log:
  Test new buffer implementation that overwrites the oldest entry when full
  
  Revision  Changes    Path
  1.1                  jakarta-commons/collections/src/test/org/apache/commons/collections/TestCircularFifoBuffer.java
  
  Index: TestCircularFifoBuffer.java
  ===================================================================
  /*
   * $Header: /home/cvs/jakarta-commons/collections/src/test/org/apache/commons/collections/TestCircularFifoBuffer.java,v
1.1 2003/04/26 15:13:22 scolebourne Exp $
   * ====================================================================
   *
   * The Apache Software License, Version 1.1
   *
   * Copyright (c) 2003 The Apache Software Foundation.  All rights
   * reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   *
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in
   *    the documentation and/or other materials provided with the
   *    distribution.
   *
   * 3. The end-user documentation included with the redistribution, if
   *    any, must include the following acknowlegement:
   *       "This product includes software developed by the
   *        Apache Software Foundation (http://www.apache.org/)."
   *    Alternately, this acknowlegement may appear in the software itself,
   *    if and wherever such third-party acknowlegements normally appear.
   *
   * 4. The names "The Jakarta Project", "Commons", and "Apache Software
   *    Foundation" must not be used to endorse or promote products derived
   *    from this software without prior written permission. For written
   *    permission, please contact apache@apache.org.
   *
   * 5. Products derived from this software may not be called "Apache"
   *    nor may "Apache" appear in their names without prior written
   *    permission of the Apache Group.
   *
   * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED
   * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   * DISCLAIMED.  IN NO EVENT SHALL THE APACHE SOFTWARE FOUNDATION OR
   * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
   * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
   * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
   * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
   * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  package org.apache.commons.collections;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Iterator;
  import java.util.List;
  
  import junit.framework.Test;
  
  /**
   * Test cases for CircularFifoBuffer.
   * 
   * @version $Revision: 1.1 $ $Date: 2003/04/26 15:13:22 $
   * 
   * @author Stephen Colebourne
   */
  public class TestCircularFifoBuffer extends TestCollection {
  
      public TestCircularFifoBuffer(String n) {
          super(n);
      }
  
      public static Test suite() {
          return BulkTest.makeSuite(TestCircularFifoBuffer.class);
      }
  
      /**
       * Returns an empty BoundedFifoBuffer that won't overflow.  
       *  
       * @return an empty BoundedFifoBuffer
       */
      public Collection makeCollection() {
          return new CircularFifoBuffer(100);
      }
  
      /**
       * Returns an empty ArrayList.
       *
       * @return an empty ArrayList
       */
      public Collection makeConfirmedCollection() {
          return new ArrayList();
      }
  
      /**
       * Returns a full ArrayList.
       *
       * @return a full ArrayList
       */
      public Collection makeConfirmedFullCollection() {
          Collection c = makeConfirmedCollection();
          c.addAll(java.util.Arrays.asList(getFullElements()));
          return c;
      }
  
      /**
       *  Overridden because CircularFifoBuffer doesn't support null elements.
       *
       *  @return an array of random objects without a null element
       */
      public Object[] getFullElements() {
          return getFullNonNullElements();
      }
  
      /**
       *  Overridden, because CircularFifoBuffer's iterators aren't fail-fast.
       */
      public void testCollectionIteratorFailFast() {
      }
  
      /**
       *  Runs through the regular verifications, but also verifies that 
       *  the buffer contains the same elements in the same sequence as the
       *  list.
       */
      public void verify() {
          super.verify();
          Iterator iterator1 = collection.iterator();
          Iterator iterator2 = confirmed.iterator();
          while (iterator2.hasNext()) {
              assertTrue(iterator1.hasNext());
              Object o1 = iterator1.next();
              Object o2 = iterator2.next();
              assertEquals(o1, o2);
          }
      }
  
      /**
       * Tests that the removal operation actually removes the first element.
       */
      public void testCircularFifoBufferCircular() {
          List list = new ArrayList();
          list.add("A");
          list.add("B");
          list.add("C");
          Buffer buf = new CircularFifoBuffer(list);
          
          assertEquals(true, buf.contains("A"));
          assertEquals(true, buf.contains("B"));
          assertEquals(true, buf.contains("C"));
          
          buf.add("D");
          
          assertEquals(false, buf.contains("A"));
          assertEquals(true, buf.contains("B"));
          assertEquals(true, buf.contains("C"));
          assertEquals(true, buf.contains("D"));
          
          assertEquals("B", buf.get());
          assertEquals("B", buf.remove());
          assertEquals("C", buf.remove());
          assertEquals("D", buf.remove());
      }
  
      /**
       * Tests that the removal operation actually removes the first element.
       */
      public void testCircularFifoBufferRemove() {
          resetFull();
          int size = confirmed.size();
          for (int i = 0; i < size; i++) {
              Object o1 = ((CircularFifoBuffer) collection).remove();
              Object o2 = ((ArrayList) confirmed).remove(0);
              assertEquals("Removed objects should be equal", o1, o2);
              verify();
          }
  
          try {
              ((CircularFifoBuffer) collection).remove();
              fail("Empty buffer should raise Underflow.");
          } catch (BufferUnderflowException e) {
              // expected
          }
      }
  
      /**
       * Tests that the constructor correctly throws an exception.
       */
      public void testConstructorException1() {
          try {
              new CircularFifoBuffer(0);
          } catch (IllegalArgumentException ex) {
              return;
          }
          fail();
      }
  
      /**
       * Tests that the constructor correctly throws an exception.
       */
      public void testConstructorException2() {
          try {
              new CircularFifoBuffer(-20);
          } catch (IllegalArgumentException ex) {
              return;
          }
          fail();
      }
      
      /**
       * Tests that the constructor correctly throws an exception.
       */
      public void testConstructorException3() {
          try {
              new CircularFifoBuffer(null);
          } catch (NullPointerException ex) {
              return;
          }
          fail();
      }
  }
  
  
  

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