| // 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); |
| } |
| } |