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Java example source code file (RetryRunnerTest.java)

This example Java source code file (RetryRunnerTest.java) is included in the alvinalexander.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Learn more about this Java project at its project page.

Java - Java tags/keywords

mathillegalstateexception, random, retry, retryrunnertest, util

The RetryRunnerTest.java Java example source code

 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF 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,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package org.apache.commons.math3;

import java.util.Random;

import org.apache.commons.math3.exception.MathIllegalStateException;

import org.junit.Test;
import org.junit.runner.RunWith;

 * Test for the "Retry" functionality (retrying Junit test methods).
public class RetryRunnerTest {
    final Random rng = new Random();

     * Shows that an always failing test will fail even if it is retried.
    public void testRetryFailAlways() {
        throw new MathIllegalStateException();

     * Shows that a test that sometimes fail might succeed if it is retried.
     * In this case the high number of retries makes it quite unlikely that
     * the exception will be thrown by all of the calls.
    public void testRetryFailSometimes() {
        if (rng.nextBoolean()) {
            throw new MathIllegalStateException();

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