1 files changed, 52 insertions, 0 deletions
diff --git a/test-base/src/junit/framework/ComparisonFailure.java b/test-base/src/junit/framework/ComparisonFailure.java
new file mode 100644
index 000000000000..507799328a44
--- /dev/null
+++ b/test-base/src/junit/framework/ComparisonFailure.java
@@ -0,0 +1,52 @@
+package junit.framework;
+
+/**
+ * Thrown when an assert equals for Strings failed.
+ * 
+ * Inspired by a patch from Alex Chaffee mailto:alex@purpletech.com
+ */
+public class ComparisonFailure extends AssertionFailedError {
+	private static final int MAX_CONTEXT_LENGTH= 20;
+	private static final long serialVersionUID= 1L;
+	
+	private String fExpected;
+	private String fActual;
+
+	/**
+	 * Constructs a comparison failure.
+	 * @param message the identifying message or null
+	 * @param expected the expected string value
+	 * @param actual the actual string value
+	 */
+	public ComparisonFailure (String message, String expected, String actual) {
+		super (message);
+		fExpected= expected;
+		fActual= actual;
+	}
+	
+	/**
+	 * Returns "..." in place of common prefix and "..." in
+	 * place of common suffix between expected and actual.
+	 * 
+	 * @see Throwable#getMessage()
+	 */
+	@Override
+	public String getMessage() {
+		return new ComparisonCompactor(MAX_CONTEXT_LENGTH, fExpected, fActual).compact(super.getMessage());
+	}
+	
+	/**
+	 * Gets the actual string value
+	 * @return the actual string value
+	 */
+	public String getActual() {
+		return fActual;
+	}
+	/**
+	 * Gets the expected string value
+	 * @return the expected string value
+	 */
+	public String getExpected() {
+		return fExpected;
+	}
+}
+\ No newline at end of file