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Testing Custom Thread Pool Exception Handling in JCSprout

This test suite evaluates a custom thread pool implementation with exception handling capabilities in Java. It focuses on testing thread pool behavior under various conditions including task execution, worker thread management, and exception scenarios.

Test Coverage Overview

The test coverage encompasses custom thread pool execution with specific focus on exception handling and worker thread behavior. Key areas tested include:

Thread pool initialization with custom parameters
Worker thread execution and state management
Exception propagation in worker threads
Notification mechanism for task completion

Implementation Analysis

The testing approach utilizes JUnit framework for unit testing, implementing both a standard test method and a main method for execution verification. The implementation leverages Java’s concurrent utilities including BlockingQueue and TimeUnit for thread coordination.

Notable patterns include callback-based notification through the Notify interface and worker state manipulation for triggering controlled exceptions.

Technical Details

Testing infrastructure includes:

JUnit test framework
SLF4J logging framework for execution tracking
ArrayBlockingQueue for thread pool task management
Custom thread pool implementation with configurable parameters
Worker class implementation with state-based exception generation

Best Practices Demonstrated

The test suite demonstrates several testing best practices:

Isolated test environment setup
Controlled exception scenario testing
Proper resource management with BlockingQueue
Logging integration for debugging and verification
Clear separation of test setup and execution logic

crossoverjie/jcsprout

src/test/java/com/crossoverjie/concurrent/CustomThreadPoolExeceptionTest.java

            
package com.crossoverjie.concurrent;

import com.crossoverjie.concurrent.communication.Notify;
import org.junit.Test;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.TimeUnit;

public class CustomThreadPoolExeceptionTest {
    private final static Logger LOGGER = LoggerFactory.getLogger(CustomThreadPoolExeceptionTest.class);
    @Test
    public void execute() {
    }


    public static void main(String[] args) throws InterruptedException {
        BlockingQueue queue = new ArrayBlockingQueue<>(1);
        CustomThreadPool pool = new CustomThreadPool(1, 1, 1, TimeUnit.SECONDS, queue, new Notify() {
            @Override
            public void notifyListen() {
                LOGGER.info("任务执行完毕");
            }
        }) ;

        pool.execute(new Worker(0));
        LOGGER.info("++++++++++++++");
        pool.mainNotify();

    }




    private static class Worker implements Runnable {

        private int state ;

        public Worker(int state) {
            this.state = state;
        }

        @Override
        public void run() {
            try {
                TimeUnit.SECONDS.sleep(1);
                LOGGER.info("state={}",state);

                while (true){
                    state ++ ;

                    if (state == 1000){
                        throw new NullPointerException("NullPointerException");
                    }
                }

            } catch (InterruptedException e) {

            }
        }
    }
}