ArrayComparisonFailure


1   package org.junit.internal;
2   
3   import java.util.ArrayList  ;
4   import java.util.List  ;
5   
6   import org.junit.Assert;
7   
8   /**
9    * Thrown when two array elements differ
10   * @see Assert#assertEquals(String, Object[], Object[])
11   */
12  public class ArrayComparisonFailure extends AssertionError   {
13  
14      private static final long serialVersionUID= 1L;
15      
16      private List  <Integer  > fIndices= new ArrayList  <Integer  >();
17      private final String   fMessage;
18      private final AssertionError   fCause;
19  
20      /**
21       * Construct a new <code>ArrayComparisonFailure</code> with an error text and the array's
22       * dimension that was not equal
23       * @param cause the exception that caused the array's content to fail the assertion test 
24       * @param index the array position of the objects that are not equal.
25       * @see Assert#assertEquals(String, Object[], Object[])
26       */
27      public ArrayComparisonFailure(String   message, AssertionError   cause, int index) {
28          fMessage= message;
29          fCause= cause;
30          addDimension(index);
31      }
32  
33      public void addDimension(int index) {
34          fIndices.add(0, index);
35      }
36  
37      @Override  
38      public String   getMessage() {
39          StringBuilder   builder= new StringBuilder  ();
40          if (fMessage != null)
41              builder.append(fMessage);
42          builder.append("arrays first differed at element ");
43          for (int each : fIndices) {
44              builder.append("[");
45              builder.append(each);
46              builder.append("]");
47          }
48          builder.append("; ");
49          builder.append(fCause.getMessage());
50          return builder.toString();
51      }
52      
53      /**
54       * {@inheritDoc}
55       */
56      @Override   public String   toString() {
57          return getMessage();
58      }
59  }
60
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