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 */
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 }