Maven surefire插件分叉模式

问题描述

默认情况下，maven surefile插件在隔离(分叉)环境中运行测试.您可以使用以下配置覆盖此行为:

By default maven surefile plugin run tests in isolated (forked) environment. You can override this behavior with following configuration:

<build>
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-surefire-plugin</artifactId>
      <configuration>
        <forkMode>never</forkMode>
      </configuration>
    </plugin>
  </plugins>
</build>

如果您需要调试测试，则应使用此配置代码段.或者，您可以简单地通过以下方式运行maven build:

If you need to debug your tests you should to use this configuration snippet. Or you could simply run maven build the following way:

$ mvn -Dmaven.surefire.debug tests

这将在端口5005上启动调试器.

This will starts a debugger on the port 5005.

我的问题是:分叉策略有什么好处，为什么选择Maven构建作为默认策略?非分叉策略不是更直接，因此应将其用作默认策略(专家是配置工具上的约定，对吗)?

My question is: what benefits have forking strategy and why is chosen as a default strategy for maven build? Isn't nonforking strategy is more straightforward and therefore should be used as default (maven is convention over configuration tool, right)?

推荐答案

默认情况下，Surefire使用仅清单文件的JAR进行测试. IMO，主要优点是:

By default, Surefire forks your tests using a manifest-only JAR. IMO, the main advantages are that:

1. 它为隔离的环境提供了某种正确"的类路径.
2. 它保护Maven进程本身(这是一件好事，特别是如果Maven正在嵌入式运行在您的IDE中).

直截了当的目的是什么?在IDE中轻松调试?我相信这并不是最初的意图(并且我更愿意在需要时连接远程调试器并保持Maven主过程的安全).

Straightforward for what? Easy debugging inside an IDE? I believe that was not the initial intention (and I prefer to connect a remote debugger if the need arises and to keep the main Maven process safe).

• 在Maven Surefire中进行类加载和派生

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