如何在specs2 2.4而不是specs2 2.3.x中使用播放框架2.3

Question

最近，specs2被更新为2.4版本，它使用的是scalaz 7.1而不是现在的7.0.x。一旦我在play！2.3项目中更新了我的specs2依赖项以使用Version2.4，所有测试都会失败，但有以下例外：

 [error] Uncaught exception when running ...Spec: java.lang.In
 compatibleClassChangeError: Found class scalaz.syntax.FunctorOps, but interface
 was expected
 sbt.ForkMain$ForkError: Found class scalaz.syntax.FunctorOps, but interface was
 expected
    at org.specs2.specification.SpecificationStructure$.createSpecificationEither(BaseSpecification.scala:119)
    at org.specs2.runner.SbtRunner.org$specs2$runner$SbtRunner$$specificationRun(SbtRunner.scala:73)
    at org.specs2.runner.SbtRunner$$anonfun$newTask$1$$anon$5.execute(SbtRunner.scala:59)
    at sbt.ForkMain$Run$2.call(ForkMain.java:294)
    at sbt.ForkMain$Run$2.call(ForkMain.java:284)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at java.lang.Thread.run(Thread.java:745)

以前似乎没有人犯过这个错误。至少我无法在specs2和play项目的问题跟踪系统中找到它。

Answer 1

我让它在播放2.3.8与此设置。

  "org.scalaz" %% "scalaz-core" % "7.1.1",
  "com.typesafe.play" %% "play-test" % "2.3.8" % "test" excludeAll(
     ExclusionRule(organization = "org.specs2")
   ),
  "org.specs2" %% "specs2-core" % "3.5" % "test",
  "org.specs2" %% "specs2-junit" % "3.5" % "test",
  "org.specs2" %% "specs2-mock" % "3.5" % "test"

Answer 2

"com.typesafe.play" %% "play-test" % "2.3.3"依赖于specs2 2.3.12，specs2 2.3.12依赖于scalaz 7.0.6

• https://github.com/playframework/playframework/blob/2.3.3/framework/project/Dependencies.scala#L9-L15
• https://github.com/playframework/playframework/blob/2.3.3/framework/project/Dependencies.scala#L182
• https://github.com/playframework/playframework/blob/2.3.3/framework/project/Build.scala#L276

您可以/不应该将它们放在一起使用。因为7.0.6和7.1.0是二进制不兼容的。

如果您想同时使用play2和Scalaz7.1，我认为有一些解决方案

• 排除"play-test"依赖项libraryDependencies ~= { _.filterNot(m => m.organization == "com.typesafe.play" && m.name == "play-test") }
• 等待播放2.4 https://github.com/playframework/playframework/pull/3330
• 用scalaz 7.1 "play-test"重建https://github.com/playframework/playframework/tree/2.3.3/framework/src/play-test/src/main/scala/play/api/test模块