/*
    * LayerStackTest.java
    *
    * Created on June 6, 2005, 10:26 AM
    */
   
   package org.lcsim.geometry.layer;
   
   import java.util.ArrayList;
  import java.util.List;
  
  import junit.framework.TestCase;
  
  import org.lcsim.material.XMLMaterialManager;
  
  /**
   * Tests that LayerStack's methods work correctly.
   * @author jeremym
   */
  public class LayerStackTest extends TestCase
  {
   
      private LayerStack layerStack;
      private static final double layerThickness = 2.0;    
      private static final int numLayers = 10;        
      private static final double layerStackThickness = layerThickness * numLayers; 
      
      private static final double[] sliceThick = { 1.0, 0.5, 0.25, 0.25 };
      private static final String[] sliceMat = { "Iron", "Silicon", "Chlorine", "Nitrogen"};
          
      /** 
       * Creates a new instance of LayerStackTest 
       **/
      public LayerStackTest(String name)
      {
          super(name);
      }
      
      protected void setUp() throws java.lang.Exception
      {    
          // Need to make sure static material classes are setup 
          // before settings up layers.
          XMLMaterialManager.setup();
          XMLMaterialManager.getDefaultMaterialManager();
          
          layerStack = new LayerStack();
          
          LayerSlice s1 = new LayerSlice(sliceMat[0], sliceThick[0], false);
          LayerSlice s2 = new LayerSlice(sliceMat[1], sliceThick[1], false);
          LayerSlice s3 = new LayerSlice(sliceMat[2], sliceThick[2], true);
          LayerSlice s4 = new LayerSlice(sliceMat[3], sliceThick[3], false);
          
          for ( int i = 0; i < numLayers; i++)
          {                       
          	List<LayerSlice> list = new ArrayList<LayerSlice>();
              
              list.add(s1);
              list.add(s2);
              list.add(s3);
              list.add(s4);
             
              Layer l = new Layer(list);
              
              layerStack.addLayer(l);
          }
          
          //System.out.println("layerStack.getTotalThickness = " + layerStack.getTotalThickness());
      }
              
      public void testLayerStack()
      {   
          // Number of layers    	
          assertEquals(layerStack.getNumberOfLayers(), numLayers);        
          
          // Total thickness. 
          assertEquals(layerStack.getTotalThickness(), layerStackThickness);
                  
          // A single layer's total thickness.
          assertEquals(layerStack.getLayer(0).getThickness(), layerThickness);                        
          
          // Section thickness.
          assertEquals(layerStack.getSectionThickness(0,4), layerStackThickness/2);
          
          // Section thickness with same layer number.
          assertEquals(layerStack.getSectionThickness(0,0), layerThickness);
  
          // Thickness to layer midpoint. 
          assertEquals(layerStack.getThicknessToLayerMid(1), layerThickness + layerThickness/2);
          
          // Thickness to layer front face with layer number 0.
          assertEquals(layerStack.getThicknessToLayerMid(0), layerThickness/2);
          
          // Thickness to layer back face.
          assertEquals(layerStack.getThicknessToLayerBack(0), layerThickness);
          
          // Thickness to layer front face. 
          assertEquals(layerStack.getThicknessToLayerFront(0), 0.0);                               
      }
  }