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      1 package junit.framework;
      2 
      3 /**
      4  * Thrown when an assert equals for Strings failed.
      5  *
      6  * Inspired by a patch from Alex Chaffee mailto:alex (at) purpletech.com
      7  */
      8 public class ComparisonFailure extends AssertionFailedError {
      9     private static final int MAX_CONTEXT_LENGTH = 20;
     10     private static final long serialVersionUID = 1L;
     11 
     12     private String fExpected;
     13     private String fActual;
     14 
     15     /**
     16      * Constructs a comparison failure.
     17      *
     18      * @param message the identifying message or null
     19      * @param expected the expected string value
     20      * @param actual the actual string value
     21      */
     22     public ComparisonFailure(String message, String expected, String actual) {
     23         super(message);
     24         fExpected = expected;
     25         fActual = actual;
     26     }
     27 
     28     /**
     29      * Returns "..." in place of common prefix and "..." in
     30      * place of common suffix between expected and actual.
     31      *
     32      * @see Throwable#getMessage()
     33      */
     34     @Override
     35     public String getMessage() {
     36         return new ComparisonCompactor(MAX_CONTEXT_LENGTH, fExpected, fActual).compact(super.getMessage());
     37     }
     38 
     39     /**
     40      * Gets the actual string value
     41      *
     42      * @return the actual string value
     43      */
     44     public String getActual() {
     45         return fActual;
     46     }
     47 
     48     /**
     49      * Gets the expected string value
     50      *
     51      * @return the expected string value
     52      */
     53     public String getExpected() {
     54         return fExpected;
     55     }
     56 }