// Copyright (C) 2000 Paco Gomez
   // Copyright (C) 2000 - 2009 Philip Aston
   // All rights reserved.
   //
   // This file is part of The Grinder software distribution. Refer to
   // the file LICENSE which is part of The Grinder distribution for
   // licensing details. The Grinder distribution is available on the
   // Internet at http://grinder.sourceforge.net/
   //
  // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  // "AS IS" AND ANY EXPRESS 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
  // COPYRIGHT HOLDERS OR 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.
  
  package net.grinder.statistics;
  
  import junit.framework.TestCase;
  
  import java.util.Comparator;
  
  import net.grinder.statistics.StatisticsSet;
  
  
  /**
   * Unit test case for <code>StatisticsView</code>.
   *
   * @author Philip Aston
   * @see StatisticsSet
   */
  public class TestStatisticsView extends TestCase {
  
    private ExpressionView[] m_views;
  
    private int m_numberOfUniqueViews;
  
    protected void setUp() throws Exception {
      final StatisticExpressionFactory statisticExpressionFactory =
        StatisticsServicesImplementation.getInstance().getStatisticExpressionFactory();
  
      m_views = new ExpressionView[] {
        statisticExpressionFactory.createExpressionView("One", "(+ userLong0 userLong1)", false),
        statisticExpressionFactory.createExpressionView("Two", "userLong0", false),
        statisticExpressionFactory.createExpressionView("Three", "(+ userLong0 userLong1)", false),
        statisticExpressionFactory.createExpressionView("Four", "userLong1", false),
        statisticExpressionFactory.createExpressionView("One", "(+ userLong0 userLong1)", false),
      };
  
      m_numberOfUniqueViews = 4;
    }
  
    public void testGetExpressionViews() throws Exception {
      final StatisticsView statisticsView = new StatisticsView();
  
      assertEquals(0, statisticsView.getExpressionViews().length);
  
      for (int i = 0; i < m_views.length; ++i) {
        statisticsView.add(m_views[i]);
      }
  
      final ExpressionView[] expressionViews = statisticsView
          .getExpressionViews();
  
      assertEquals(m_numberOfUniqueViews, expressionViews.length);
  
      // Ordered in order of creation.
      assertEquals(m_views[0], expressionViews[0]);
      assertEquals(m_views[1], expressionViews[1]);
      assertEquals(m_views[2], expressionViews[2]);
      assertEquals(m_views[3], expressionViews[3]);
  
      // Again, adding in a different order.
      final StatisticsView statisticsView2 = new StatisticsView();
  
      for (int i = m_views.length - 1; i >= 0; --i) {
        statisticsView2.add(m_views[(2 + i) % m_views.length]);
      }
  
      final ExpressionView[] expressionViews2 = statisticsView
          .getExpressionViews();
  
      assertEquals(m_numberOfUniqueViews, expressionViews2.length);
  
      // Ordered in order of creation.
      assertEquals(m_views[0], expressionViews2[0]);
      assertEquals(m_views[1], expressionViews2[1]);
      assertEquals(m_views[2], expressionViews2[2]);
      assertEquals(m_views[3], expressionViews2[3]);
    }
  
    public void testAddStatisticsView() throws Exception {
      final StatisticsView statisticsView = new StatisticsView();
 
     statisticsView.add(statisticsView);
     assertEquals(0, statisticsView.getExpressionViews().length);
 
     final StatisticsView statisticsView2 = new StatisticsView();
 
     statisticsView.add(statisticsView);
     assertEquals(0, statisticsView.getExpressionViews().length);
 
     for (int i = 0; i < m_views.length; ++i) {
       statisticsView.add(m_views[i]);
     }
 
     statisticsView2.add(statisticsView);
     assertEquals(m_numberOfUniqueViews,
       statisticsView2.getExpressionViews().length);
 
     statisticsView2.add(statisticsView);
     assertEquals(m_numberOfUniqueViews,
       statisticsView2.getExpressionViews().length);
   }
 
   public void testComparator() throws Exception {
     // Test the parts of the Comparator that the normal use cases don't reach.
     final Comparator<ExpressionView> comparator =
       new StatisticsView.CreationOrderComparator();
 
     assertEquals(0, comparator.compare(m_views[0], m_views[0]));
   }
 }