测试时如何按顺序运行子项目测试(包括设置方法)

EDIT4 水平线下方的大部分文本与实际问题没有任何关系.一开始我认为分叉是问题，但事实并非如此.

EDIT4 Most of the text below the horizontal rule doesn't have anything to do with the real problem. At the beginning I thought forking is the problem, but that is not true.

我正在尝试运行聚合子项目的所有测试.在子项目中的所有测试之前，应该运行设置方法，在子项目中的测试之后，应该运行清理方法.

I'm trying to run all the tests of an aggregates subprojects. Before all the tests in a subproject a setup method should run, and after the tests in a subproject a cleanup method should run.

在运行聚合项目的测试任务时，我期望以下顺序

When running the test task for the aggregate project, I expect the following sequence

• 调用A项目的设置方法
• 执行项目 A 的测试
• 调用项目 A 的清理方法
• 项目 B 相同

但顺序是:

• 项目A和B的设置方法被调用
• 执行项目 A 的测试
• 执行项目 B 的测试
• 调用项目A和B的清理方法

可以在此处找到具有此行为的构建脚本.

A build script having this behaviour can be found here.

如何解决这个问题以获得我预期的序列?

How can I fix this problem to get my expected sequence?

我正在使用 forking 在我的子项目中运行测试.对于每个子项目，在测试之前启动一个 mongo db 并停止测试后.

I'm using forking to run the tests in my subprojects. For every subproject a mongo db is started before the tests and stopped after the tests.

一个项目中的测试按顺序运行；如果我为单个项目运行测试，这很有效.

The tests within one project run sequentially; this works well if I run the tests for a single project.

但是如果我为项目根(包含子项目的聚合)运行任务 test，我希望分叉的 jvm 依次启动，即

But if I run the task test for project root (the aggregate containing the sub projects), I want the forked jvms to be started sequentially, i.e.

1. 项目 A 的 jvm 被派生并执行其测试
2. 项目 B 的 jvm 被派生并执行其测试
3. ...

但是看起来jvm是并行启动的；这不是我想要的.

But it looks like the jvms are started in parallel; this is not what I want.

我尝试了以下操作(根据文档，它应该已经设置为 1):

I tried the following (which should be set to 1 already, according to the documentation):

  concurrentRestrictions in Test := Seq(
    Tags.limit(Tags.ForkedTestGroup, 1)
  )

但是没有用.直接启动测试任务后，如下从我的设置方法打印(在打印任何测试日志之前):

But it didn't work. Directly after starting the test task, the following is printed (before any test log is printed) from my setup method:

startupDb, thread name = pool-4-thread-5 
startupDb, thread name = pool-4-thread-7 
startupDb, thread name = pool-4-thread-2 
startupDb, thread name = pool-4-thread-6 
startupDb, thread name = pool-4-thread-8
startupDb, thread name = pool-4-thread-3 
startupDb, thread name = pool-4-thread-9

这些是我的测试相关设置:

These are my test related settings:

parallelExecution in Test := false,
testOptions in Test += Tests.Setup( () => MongoTest.startupDb() ),
testOptions in Test += Tests.Cleanup( () => MongoTest.shutdownDb() ),
fork in Test := true,
concurrentRestrictions in Test := Seq(
  Tags.limit(Tags.ForkedTestGroup, 1)
)

使用分叉对我来说很重要，但方式如上所述.

It's important for me to use forking, but in the way as described above.

我在 Windows 7 上使用 sbt 0.13.0.

I'm using sbt 0.13.0 on Windows 7.

编辑我用示例构建创建了一个要点.

EDIT2 在 文档它说:

通过设置Tags.ForkedTestGroup标签的限制来控制允许同时运行的分叉JVM的数量，默认为1

Control the number of forked JVMs allowed to run at the same time by setting the limit on Tags.ForkedTestGroup tag, which is 1 by default

所以这在理论上应该可行.这是一个错误吗?如果没有，我怎样才能做到这一点?

So this should work theoretically. Is this a bug? If not, how can I manage to do that?

EDIT3 看起来分叉不是问题.问题是所有子项目都会立即调用设置方法.

EDIT3 It looks like forking is not the problem. The problem is that the setup methods are called immediately for all subprojects.