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Testing ZooKeeper Log Position Management in Alibaba Canal

This test suite validates the ZooKeeper-based log position management functionality in Alibaba Canal, ensuring proper persistence and retrieval of binlog positions. It focuses on testing the ZooKeeperLogPositionManager implementation with cluster configuration and cleanup operations.

Test Coverage Overview

The test suite provides comprehensive coverage of ZooKeeper-based log position management functionality.

Key areas tested include:

ZooKeeper client initialization with multiple cluster endpoints
Path management for destination-specific positions
Recursive deletion of ZooKeeper paths
Start/stop lifecycle management

Implementation Analysis

The testing approach utilizes JUnit 4 framework with inheritance from AbstractLogPositionManagerTest for common test scenarios. The implementation employs a setUp/tearDown pattern for proper test isolation, ensuring clean ZooKeeper paths before and after test execution.

Technical patterns include:

ZkClientx wrapper usage for ZooKeeper operations
Path utility integration for consistent naming
Lifecycle management testing

Technical Details

Testing infrastructure includes:

JUnit 4 testing framework
ZkClientx for ZooKeeper interaction
ZookeeperPathUtils for path management
Multiple cluster endpoint configuration
Before/After test hooks for setup/cleanup
Inheritance-based test organization

Best Practices Demonstrated

The test suite exemplifies several testing best practices in distributed systems testing.

Notable practices include:

Proper resource cleanup in tearDown methods
Test isolation through path cleanup
Structured test lifecycle management
Clear separation of setup and test logic
Reusable test base class utilization

alibaba/canal

parse/src/test/java/com/alibaba/otter/canal/parse/index/ZooKeeperLogPositionManagerTest.java

            
package com.alibaba.otter.canal.parse.index;

import org.junit.After;
import org.junit.Before;
import org.junit.Ignore;
import org.junit.Test;

import com.alibaba.otter.canal.common.zookeeper.ZkClientx;
import com.alibaba.otter.canal.common.zookeeper.ZookeeperPathUtils;

public class ZooKeeperLogPositionManagerTest extends AbstractLogPositionManagerTest {

    private ZkClientx zkclientx = new ZkClientx(cluster1 + ";" + cluster2);

    @Before
    public void setUp() {
        String path = ZookeeperPathUtils.getDestinationPath(destination);
        zkclientx.deleteRecursive(path);
    }
    @After
    public void tearDown() {
        String path = ZookeeperPathUtils.getDestinationPath(destination);
        zkclientx.deleteRecursive(path);
    }

    @Ignore
    @Test
    public void testAll() {
        ZooKeeperLogPositionManager logPositionManager = new ZooKeeperLogPositionManager(zkclientx);
        logPositionManager.start();

        doTest(logPositionManager);
        logPositionManager.stop();
    }
}