/*
* Copyright 2014 WANdisco
*
* WANdisco licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package c5db.util;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.MultipleFailureException;
import org.junit.runners.model.Statement;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.function.Consumer;
/**
* JUnit TestRule intended to be used as a callback for an instance of {@link ExceptionHandlingBatchExecutor},
* which in turns allows creating fibers such that uncaught exceptions are gathered by this rule. After a test
* method runs, this rule will rethrow any caught exceptions. They are rethrown in the context of the thread
* in which the test runs.
*/
public class JUnitRuleFiberExceptions implements TestRule, Consumer<Throwable> {
private final List<Throwable> throwables = Collections.synchronizedList(new ArrayList<>());
public JUnitRuleFiberExceptions() {
}
@Override
public void accept(Throwable throwable) {
throwables.add(throwable);
}
@Override
public Statement apply(final Statement base, Description description) {
return new Statement() {
@Override
public void evaluate() throws Throwable {
try {
base.evaluate();
} catch (Throwable t) {
throwables.add(t);
}
MultipleFailureException.assertEmpty(throwables);
}
};
}
}