如何使用 playframework 2.3 和 specs2 2.4 而不是 specs2 2.3.x

Question

最近，specs2 已更新到版本 2.4，它现在使用 scalaz 7.1 而不是 7.0.x。一旦我在我的游戏中更新了我的 specs2 依赖项！ 2.3 项目使用 2.4 版本，所有测试均失败，以下异常：

 [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)

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

Answer 1

我用这个设置让它在 Play 2.3.8 中工作。

  "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，而 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/不应该将它们一起使用。因为 scalaz 7.0.6 和 7.1.0 是二进制不兼容的。

如果你想同时使用play2和scalaz 7.1，我认为有一些解决方案

• 排除"play-test"依赖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
• 使用 scalaz 7.1 https://github.com/playframework/playframework/tree/2.3.3/framework/src/play-test/src/main/scala/play/api/test 重建 "play-test" 模块