1 files changed, 49 insertions, 0 deletions
diff --git a/src/main/java/org/junit/experimental/theories/internal/ParameterizedAssertionError.java b/src/main/java/org/junit/experimental/theories/internal/ParameterizedAssertionError.java
new file mode 100644
index 0000000..285bc3a
--- /dev/null
+++ b/src/main/java/org/junit/experimental/theories/internal/ParameterizedAssertionError.java
@@ -0,0 +1,49 @@
+/**
+ * 
+ */
+package org.junit.experimental.theories.internal;
+
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.Iterator;
+
+
+public class ParameterizedAssertionError extends RuntimeException {
+	private static final long serialVersionUID = 1L;
+
+	public ParameterizedAssertionError(Throwable targetException,
+			String methodName, Object... params) {
+		super(String.format("%s(%s)", methodName, join(", ", params)),
+				targetException);
+	}
+
+	@Override public boolean equals(Object obj) {
+		return toString().equals(obj.toString());
+	}
+
+	public static String join(String delimiter, Object... params) {
+		return join(delimiter, Arrays.asList(params));
+	}
+
+	public static String join(String delimiter,
+			Collection<Object> values) {
+		StringBuffer buffer = new StringBuffer();
+		Iterator<Object> iter = values.iterator();
+		while (iter.hasNext()) {
+			Object next = iter.next();
+			buffer.append(stringValueOf(next));
+			if (iter.hasNext()) {
+				buffer.append(delimiter);
+			}
+		}
+		return buffer.toString();
+	}
+
+	private static String stringValueOf(Object next) {
+		try {
+			return String.valueOf(next);
+		} catch (Throwable e) {
+			return "[toString failed]";
+		}
+	}
+}
+\ No newline at end of file