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@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 */ ComparisonFailure(String message, String expected, String actual)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 getMessage()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 */ getActual()44 public String getActual() { 45 return fActual; 46 } 47 48 /** 49 * Gets the expected string value 50 * 51 * @return the expected string value 52 */ getExpected()53 public String getExpected() { 54 return fExpected; 55 } 56 }