1 files changed, 60 insertions, 0 deletions
diff --git a/src/main/java/org/junit/runners/model/MultipleFailureException.java b/src/main/java/org/junit/runners/model/MultipleFailureException.java
new file mode 100644
index 0000000..6d70ca0
--- /dev/null
+++ b/src/main/java/org/junit/runners/model/MultipleFailureException.java
@@ -0,0 +1,60 @@
+// Copyright 2010 Google Inc. All Rights Reserved.
+
+package org.junit.runners.model;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+/**
+ * Collects multiple {@code Throwable}s into one exception.
+ */
+public class MultipleFailureException extends Exception {
+	private static final long serialVersionUID= 1L;
+	
+	private final List<Throwable> fErrors;
+
+	public MultipleFailureException(List<Throwable> errors) {
+		fErrors= new ArrayList<Throwable>(errors);
+	}
+
+	public List<Throwable> getFailures() {
+		return Collections.unmodifiableList(fErrors);
+	}
+
+	@Override
+	public String getMessage() {
+		StringBuilder sb = new StringBuilder(
+				String.format("There were %d errors:", fErrors.size()));
+		for (Throwable e : fErrors) {
+			sb.append(String.format("\n  %s(%s)", e.getClass().getName(), e.getMessage()));
+		}
+		return sb.toString();
+	}
+
+	/**
+	 * Asserts that a list of throwables is empty. If it isn't empty,
+	 * will throw {@link MultipleFailureException} (if there are
+	 * multiple throwables in the list) or the first element in the list
+	 * (if there is only one element).
+	 * 
+	 * @param errors list to check
+	 * @throws Throwable if the list is not empty
+	 */
+	@SuppressWarnings("deprecation")
+	public static void assertEmpty(List<Throwable> errors) throws Throwable {
+		if (errors.isEmpty())
+			return;
+		if (errors.size() == 1)
+			throw errors.get(0);
+
+		/*
+		 * Many places in the code are documented to throw
+		 * org.junit.internal.runners.model.MultipleFailureException.
+		 * That class now extends this one, so we throw the internal
+		 * exception in case developers have tests that catch
+		 * MultipleFailureException.
+		 */
+		throw new org.junit.internal.runners.model.MultipleFailureException(errors);
+	}
+}