解决测试、testhelper 和被测项目之间的 Maven 循环依赖关系 [英] Resolving Maven circular dependencies between test, testhelper, and project-under-test

问题描述

我的设置是这样的.我有项目 A，以及一个依赖于 A 的测试项目:

my set up is this. I have project A, and a test project depending on A:

A <- A_t

我还有其他项目取决于 A(及其测试):

I also have other projects depending on A (and their tests):

A <- B <- B_t

为了简化一些测试，我引入了一个新的库来帮助测试基于 A 的东西:

To simplify some of the testing I introduce a new library helping test stuff based on A:

A <- Atesthelper

所以 A_t(和 B_t)将依赖于这个测试助手，像这样:

So A_t (and B_t) will depend on this test helper, like this:

A <- A_t
^    |
|    v
Atesthelper

但是，当我创建 Maven 项目 (pom.xml) 时，通常的做法是将项目和该项目的测试捆绑在同一个 pom.xml 中.我为 Atesthelper

However when I create Maven projects (pom.xml) it seems the usual thing is to bundle both the project and the test of that project in the same pom.xml. And I create a new pom.xml for the Atesthelper

所以现在变成了:

(A <- A_t)
  ^    |
  |    v
Atesthelper

这是一个循环依赖.是否可以在 pom.xml 中以某种方式指定 Atesthelper 只是测试构建目标的依赖项，而不是 A 模块本身?

Which is a circular dependency. Is it possible in the pom.xml to somehow specify that Atesthelper is only a dependency of the test build target, and not the A module in itself?

所以构建顺序应该是:A、Atesthelper、A_t.IE.A 和 A_t 在同一个 pom 中指定，不能同时构建.

So the build order should be: A, Atesthelper, A_t. I.e. A and A_t which are specified in the same pom, should not be build at the same time.

提前致谢.

推荐答案

你需要解决的问题是 Atesthelper 到 A 的依赖，那么其他的一切都会工作正常:A 依赖于 Atesthelper，B 依赖于 Atesthelper 和两者 AB 将包含源和测试.Atesthelper 将包含在 A 和 B 中的范围 test 中.那是你的目标状态.

The problem that you need to solve is the dependency from Atesthelper to A, then everything else will work fine: A depends on Atesthelper, B depends on Atesthelper and both A and B will contain both sources and tests. Atesthelper will be included with scope test in both A and B. That's your target state.

你怎么去那里?您需要将 Atesthelper 所依赖的项目提取到单独的项目中.通常，这些是接口或其他通用功能，无论如何都应该将其放入单独的项目中 - 我们称之为 ACommon.所以你的目标布局应该是这样的:

How do you get there? You need to extract the items that Atesthelper is depending on into a separate projects. Typically, these are interfaces or other common functionality, which should be put into a separate project anyway - let's call it ACommon. So your target layout should look like this:

ACommon <- Atesthelper
       ^    ^
       |   /
         A (and also B)

Atesthelper 依赖于 A 中的哪些功能?你能把它移到一个单独的项目(ACommon)吗?

What kind of functionality is Atesthelper depending on in A? Can you move it to a separate project (ACommon)?

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