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/*
* Copyright (C) 2016, Matthias Sohn <matthias.sohn@sap.com>
* and other copyright owners as documented in the project's IP log.
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Distribution License v1.0 which
* accompanies this distribution, is reproduced below, and is
* available at http://www.eclipse.org/org/documents/edl-v10.php
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* - Neither the name of the Eclipse Foundation, Inc. nor the
* names of its contributors may be used to endorse or promote
* products derived from this software without specific prior
* written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
package org.eclipse.jgit.junit;
import java.text.MessageFormat;
import java.util.logging.Level;
import java.util.logging.Logger;
import org.junit.rules.TestRule;
import org.junit.runner.Description;
import org.junit.runners.model.Statement;
/**
* {@link org.junit.rules.TestRule} which enables to run the same JUnit test
* repeatedly. Add this rule to the test class
*
* <pre>
* public class MyTest {
* @Rule
* public RepeatRule repeatRule = new RepeatRule();
* ...
* }
* </pre>
*
* and annotate the test to be repeated with the
* {@code @Repeat(n=<repetitions>)} annotation
*
* <pre>
* @Test
* @Repeat(n = 100)
* public void test() {
* ...
* }
* </pre>
*
* then this test will be repeated 100 times. If any test execution fails test
* repetition will be stopped.
*/
public class RepeatRule implements TestRule {
private static Logger LOG = Logger
.getLogger(RepeatRule.class.getName());
/**
* Exception thrown if repeated execution of a test annotated with
* {@code @Repeat} failed.
*/
public static class RepeatedTestException extends RuntimeException {
private static final long serialVersionUID = 1L;
/**
* Constructor
*
* @param message
* the error message
*/
public RepeatedTestException(String message) {
super(message);
}
/**
* Constructor
*
* @param message
* the error message
* @param cause
* exception causing this exception
*/
public RepeatedTestException(String message, Throwable cause) {
super(message, cause);
}
}
private static class RepeatStatement extends Statement {
private final int repetitions;
private boolean abortOnFailure;
private final Statement statement;
private RepeatStatement(int repetitions, boolean abortOnFailure,
Statement statement) {
this.repetitions = repetitions;
this.abortOnFailure = abortOnFailure;
this.statement = statement;
}
@Override
public void evaluate() throws Throwable {
int failures = 0;
for (int i = 0; i < repetitions; i++) {
try {
statement.evaluate();
} catch (Throwable e) {
failures += 1;
RepeatedTestException ex = new RepeatedTestException(
MessageFormat.format(
"Repeated test failed when run for the {0}. time",
Integer.valueOf(i + 1)),
e);
LOG.log(Level.SEVERE, ex.getMessage(), ex);
if (abortOnFailure) {
throw ex;
}
}
}
if (failures > 0) {
RepeatedTestException e = new RepeatedTestException(
MessageFormat.format(
"Test failed {0} times out of {1} repeated executions",
Integer.valueOf(failures),
Integer.valueOf(repetitions)));
LOG.log(Level.SEVERE, e.getMessage(), e);
throw e;
}
}
}
/** {@inheritDoc} */
@Override
public Statement apply(Statement statement, Description description) {
Statement result = statement;
Repeat repeat = description.getAnnotation(Repeat.class);
if (repeat != null) {
int n = repeat.n();
boolean abortOnFailure = repeat.abortOnFailure();
result = new RepeatStatement(n, abortOnFailure, statement);
}
return result;
}
}
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