How to run a custom task(functional tests written

I am working on a web app that's built atop Play Framework.

The goal I want to achieve is to create a custom sbt task that works like this:

start the play application
run my custom task (functional tests written in javascript that depends on the running application)
stop the application after my custom task is done

Now I am stuck on step two.

I have this sbt script that's working:

lazy val anotherTask = taskKey[Unit]("run this first")
lazy val myCustomTask = taskKey[Unit]("try to run shell in sbt")

anotherTask := {
  println("i am the first task")
}

myCustomTask := {
  println("try to run shell")
  import scala.sys.process._
  println("git status" !!)
  println("the shell command worked, yeah!")
}

myCustomTask <<= myCustomTask.dependsOn(anotherTask)

But if I try to make myCustomTask depend on the run task (which starts the play app) by modifying the script like this:

myCustomTask <<= myCustomTask.dependsOn(runTask _)

I get the following error:

error: type mismatch; found : (sbt.Configuration, String, Seq[String]) => sbt.Def.Initialize[sbt.Task[Unit]] required: sbt.Scoped.AnyInitTask (which expands to) sbt.Def.Initialize[sbt.Task[T]] forSome { type T }

How should I solve this problem?

At last, I ended up with a specs2 class like this:

  "my app" should {

    "pass the protractor tests" in {
      running(TestServer(9000)) {

        Await.result(WS.url("http://localhost:9000").get, 2 seconds).status === 200
        startProtractor(getProcessIO) === 0
      }
    }

  }


  private def startProtractor(processIO: ProcessIO): Int = {
    Process("protractor", Seq( """functional-test/config/buildspike.conf.js"""))
      .run(processIO)
      .exitValue()
  }

  private def getProcessIO: ProcessIO = {
    new ProcessIO(_ => (),
      stdout => fromInputStream(stdout).getLines().foreach(println),
      _ => ())
  }

回答1:

Run is an Input Task, if you want to use it in conjunction with a normal task, you have to convert it to a task first.

You can get a task from an input task by using toTask method as it is described in the documentation.

myCustomTask <<= myCustomTask.dependsOn((run in Compile).toTask(""))

回答2:

I would use the following to depend on the run task:

myCustomTask <<= myCustomTask dependsOn run

While changing the build I would also use sbt.Process API to execute git status.

"git version".!

It's supposed to be working fine(r) with the changes.