# Uber Migrates 75,000+ Test Classes from Junit 4 to Junit 5 Using Automated Code Transformation

Canonical URL: https://www.traeai.com/articles/308ed0d5-f50d-44f8-a8dd-441ef92df86e
Original source: https://www.infoq.com/news/2026/04/uber-junit4-junit5-migration/?utm_campaign=infoq_content&utm_source=infoq&utm_medium=feed&utm_term=global
Source name: InfoQ
Content type: article
Language: 英文
Score: 8.5
Reading time: 12 分钟
Published: 2026-04-27T14:07:00+00:00
Tags: JUnit, 测试, 自动化, Java

## Summary

Uber通过自动化代码转换工具，成功将75,000多个测试类从JUnit 4迁移到JUnit 5，分享了迁移策略和工具设计。

## Key Takeaways

- Uber开发了自动化工具完成大规模JUnit 4到JUnit 5的迁移。
- 迁移过程注重兼容性，确保新旧版本无缝切换。
- 案例为其他企业提供了大规模测试框架升级的参考。

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