1 files changed, 20 insertions, 0 deletions
diff --git a/junit4/src/main/java/junit/framework/AssertionFailedError.java b/junit4/src/main/java/junit/framework/AssertionFailedError.java
new file mode 100644
index 0000000..0d7802c
--- /dev/null
+++ b/junit4/src/main/java/junit/framework/AssertionFailedError.java
@@ -0,0 +1,20 @@
+package junit.framework;
+
+/**
+ * Thrown when an assertion failed.
+ */
+public class AssertionFailedError extends AssertionError {
+
+	private static final long serialVersionUID= 1L;
+
+	public AssertionFailedError() {
+	}
+
+	public AssertionFailedError(String message) {
+		super(defaultString(message));
+	}
+
+	private static String defaultString(String message) {
+		return message == null ? "" : message;
+	}
+}
+\ No newline at end of file