1package 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 */
8public 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	 * @param message the identifying message or null
18	 * @param expected the expected string value
19	 * @param actual the actual string value
20	 */
21	public ComparisonFailure (String message, String expected, String actual) {
22		super (message);
23		fExpected= expected;
24		fActual= actual;
25	}
26
27	/**
28	 * Returns "..." in place of common prefix and "..." in
29	 * place of common suffix between expected and actual.
30	 *
31	 * @see java.lang.Throwable#getMessage()
32	 */
33	public String getMessage() {
34		return new ComparisonCompactor(MAX_CONTEXT_LENGTH, fExpected, fActual).compact(super.getMessage());
35	}
36
37	/**
38	 * Gets the actual string value
39	 * @return the actual string value
40	 */
41	public String getActual() {
42		return fActual;
43	}
44	/**
45	 * Gets the expected string value
46	 * @return the expected string value
47	 */
48	public String getExpected() {
49		return fExpected;
50	}
51}