Back to Repositories

Testing UUID Set Parsing Implementation in Canal

A comprehensive test suite for UUID set handling in the Canal MySQL driver, focusing on string representation and parsing of UUID-based transaction identifiers. This test validates the correct formatting and merging of UUID ranges used in MySQL replication.

Test Coverage Overview

The test suite provides targeted coverage for UUID set parsing and string representation functionality.

Key areas tested include:

Single UUID with single transaction ID
UUID with continuous transaction range
UUID with mergeable transaction ranges
UUID with non-mergeable transaction ranges

The test specifically validates edge cases in transaction ID formatting and range merging behavior.

Implementation Analysis

The testing approach uses a map-based test case structure to validate multiple UUID set scenarios efficiently. The implementation leverages JUnit’s assertion framework to verify string representation outcomes.

The test employs a data-driven pattern where test cases are defined in a HashMap, enabling easy addition of new test scenarios without modifying the test logic.

Technical Details

Testing tools and configuration:

JUnit 4 testing framework
HashMap for test case management
Custom UUIDSet parser from Canal MySQL driver
Assert.assertEquals for validation
Java String manipulation for UUID formatting

Best Practices Demonstrated

The test implementation showcases several testing best practices:

Clear test case organization using key-value pairs
Systematic validation of multiple scenarios
Efficient test case management
Clear separation of test data and test logic
Descriptive test method naming

alibaba/canal

driver/src/test/java/com/alibaba/otter/canal/parse/driver/mysql/UUIDSetTest.java

            
package com.alibaba.otter.canal.parse.driver.mysql;

import static org.junit.Assert.assertEquals;

import java.util.HashMap;
import java.util.Map;

import org.junit.Test;

import com.alibaba.otter.canal.parse.driver.mysql.packets.UUIDSet;

/**
 * Created by hiwjd on 2018/4/26. [email protected]
 */
public class UUIDSetTest {

    @Test
    public void testToString() {
        Map<String, String> cases = new HashMap<>(4);
        cases.put("726757ad-4455-11e8-ae04-0242ac110002:1", "726757ad-4455-11e8-ae04-0242ac110002:1");
        cases.put("726757ad-4455-11e8-ae04-0242ac110002:1-3", "726757ad-4455-11e8-ae04-0242ac110002:1-3");
        cases.put("726757ad-4455-11e8-ae04-0242ac110002:1-3:4-6", "726757ad-4455-11e8-ae04-0242ac110002:1-6");
        cases.put("726757ad-4455-11e8-ae04-0242ac110002:1-3:5-7", "726757ad-4455-11e8-ae04-0242ac110002:1-3:5-7");

        for (Map.Entry<String, String> entry : cases.entrySet()) {
            String expected = entry.getValue();
            assertEquals(expected, UUIDSet.parse(entry.getKey()).toString());
        }
    }
}