有没有办法在内存中为 JUnit 测试用例运行 MySQL? [英] Is there a way to run MySQL in-memory for JUnit test cases?

问题描述

我只是想为访问 MySQL 数据库的服务添加测试用例，我想重新创建整个架构(对于某些场景，还只使用包含每个测试用例所需数据的 MySQL 转储文件).我环顾四周，发现有些人使用 SQLite/H2 和其他人来执行此操作，但我只是在徘徊是否有任何方法可以在内存中运行 MySQL，因此我无需担心任何特定于 MySQL 的问题我可能在我们的服务中使用的方言.

I'm just trying to add test cases for services accessing a MySQL DB, and I would like to recreate the whole schema (and for some scenarios also just use a MySQL dump file with the data needed for each test case). I was looking around and found some guys using SQLite / H2 and others to do this, but I'm just wandering if there is any way to run MySQL in-memory so I don't need to worry about anything specific to the the MySQL dialect I might be using on our services.

推荐答案

使用与 MySQL 完全兼容并可在 JUnit 测试用例中使用的内存数据库的最简单方法是 imho MariaDB4j.你只需要一个 Gradle (/Maven) 依赖 (http://search.maven.org/#search%7Cga%7C1%7Ca%3A%22mariaDB4j%22) 和几行代码开始:

The easiest way for using an in memory database that is fully compatible to MySQL and can be used within JUnit test cases is imho MariaDB4j. you just need a Gradle (/Maven) dependency (http://search.maven.org/#search%7Cga%7C1%7Ca%3A%22mariaDB4j%22) and a few lines of code to start:

DB database = DB.newEmbeddedDB(3306);
database.start();
Connection connection = DriverManager.getConnection("jdbc:mysql://localhost/test", "root", "");

可以通过以下方式包含启动脚本

a startup script can be included via

database.source("path/to/resource.sql");

有关 GitHub 自述文件的更多信息:https://github.com/vorburger/MariaDB4j

More information on GitHub readme: https://github.com/vorburger/MariaDB4j

我对这个答案添加了一些提示:MariaDB4j 似乎在系统临时文件夹中添加了文件.因此它将以嵌入式方式工作，这意味着无需安装任何东西，您只需通过所需的构建工具使用依赖项即可.但这不是真正的仅内存解决方案，因此我们不能再谈论单元测试，因为单元测试不能依赖于文件或数据库

I have a add some hints to this answer: The MariaDB4j seems to add files in the systems temporary folder. So it will work in an embedded way which means there is no need to install anything and you can just use the dependency via your desired build tool. But it's not a true in-memory-only solution and therefore we cannot speak of unit tests anymore because unit tests mustn't rely on files or databases

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