在Play 2.2, Spec2测试中，我得到配置错误[无法连接到数据库[默认]]

我在Play框架2.2版应用程序中使用Scala Spec2。当我运行测试时，我得到以下错误:

$ test-only ApplicationSpec
Mode is Test, Loading: application.test.conf
Create schema
Populate the application schema...
Stopping the application...
Stopping the application...
Stopping the application...
[info] ApplicationSpec
[info] Application should
[info] + send 404 on a bad request
[info] ! render the login page
[error]     anon$1: Configuration error[Cannot connect to database [default]] (Configuration.scala:92)
[error] play.api.Configuration$.play$api$Configuration$$configError(Configuration.scala:92)
[error] play.api.Configuration.reportError(Configuration.scala:570)
[error] play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:252)
[error] play.api.db.BoneCPPlugin$$anonfun$onStart$1.apply(DB.scala:243)
[error] play.api.db.BoneCPPlugin.onStart(DB.scala:243)
[error] play.api.Play$$anonfun$start$1$$anonfun$apply$mcV$sp$1.apply(Play.scala:88)
[error] play.api.Play$$anonfun$start$1$$anonfun$apply$mcV$sp$1.apply(Play.scala:88)
[error] play.api.Play$$anonfun$start$1.apply$mcV$sp(Play.scala:88)
[error] play.api.Play$$anonfun$start$1.apply(Play.scala:88)
[error] play.api.Play$$anonfun$start$1.apply(Play.scala:88)
[error] play.utils.Threads$.withContextClassLoader(Threads.scala:18)
[error] play.api.Play$.start(Play.scala:87)
[error] play.api.test.PlayRunners$class.running(Helpers.scala:44)
[error] play.api.test.Helpers$.running(Helpers.scala:364)
[error] ApplicationSpec$$anonfun$1$$anonfun$apply$12.apply(ApplicationSpec.scala:25)
[error] ApplicationSpec$$anonfun$1$$anonfun$apply$12.apply(ApplicationSpec.scala:25)

MockGlobal.scala包含以下代码:

object MockGlobal extends GlobalSettings {
  override def onStart(app: Application) {
    super.onStart(app)
    // check if the database is already setup
    implicit val a = app
    if (isDatabaseEmpty(app)) {
      println("Create schema")
      FixtureUtils.populateSchema
      println("Pouplate fixtures ")
      FixtureUtils.GoldData.populateFixtures
    }
  }
  def isDatabaseEmpty(app: Application) = {
    implicit val a = app
    DB.withSession { implicit session =>
      val lst = MTable.getTables("users").list()
      lst.isEmpty
    }
  }
  override def onLoadConfig(config: Configuration,
    path: File, classloader: ClassLoader,
    mode: Mode.Mode): Configuration = {
    val configfile = s"application.${mode.toString.toLowerCase}.conf"
    println(s"Mode is ${mode.toString}, Loading: ${configfile}")
    val modeSpecificConfig = config ++ Configuration(
      ConfigFactory.load(configfile))
    super.onLoadConfig(modeSpecificConfig, path, classloader, mode)
  }
  override def onStop(app: Application) {
    println("Stopping the application...")
  }
}

TestApplication.scala包含以下代码:

object TestApplication {
  val log = play.Logger.of("application")
  lazy val app = FakeApplication(withGlobal = Some(MockGlobal))
}

ApplicationSpec.scala包含以下代码:

import org.specs2.mutable._
import org.specs2.runner._
import org.junit.runner._
import play.api.test._
import play.api.test.Helpers._
import models.User
import models.Users
import fixtures.TestApplication
import fixtures.FixtureUtils
/**
 * Add your spec here.
 * You can mock out a whole application including requests, plugins etc.
 * For more information, consult the wiki.
 */
@RunWith(classOf[JUnitRunner])
class ApplicationSpec extends Specification {
  "Application" should {
    "send 404 on a bad request" in new WithApplication(TestApplication.app) {
      route(FakeRequest(GET, "/boum")) must beNone
    }
    "render the login page" in running(TestApplication.app) {
      val home = route(FakeRequest(GET, "/")).get
      // must redirect to login page
      status(home) must equalTo(SEE_OTHER)
      val x = redirectLocation(home).map { location =>
        location must equalTo("/login")
        val loginpage = route(FakeRequest(GET, "/login")) map { result =>
          status(result) must equalTo(OK)
          contentType(result) must beSome.which(_ == "text/html")
          contentAsString(result) must contain("Apps: Login")
        }
      }
      x must beSome
    }
  }
}

我在这里看到类似的错误报告:

https://github.com/playframework/playframework/issues/1667
https://groups.google.com/forum/!主题/play框架/apKy2qVUttw

我尝试在build.sbt中添加以下行，以避免每次测试都分叉。这也没有用:

Keys.fork in (Test) := false

注意两点:

Configuration error[Cannot connect to database [default]] (Configuration.scala:92)

出现三次Stopping the application...

如何解决这个问题?

我试图避免每次运行测试都创建一个新的应用程序，所以我使用:

lazy val app = FakeApplication(withGlobal = Some(MockGlobal))

然而，这是错误的方法。对于分叉测试，一旦它完成，应用程序将停止，从而使其不可用于其他测试。这就是我在执行的第一个测试中得到数据库连接错误的原因。

我更改了规格测试定义

from this: in new WithApplication(TestApplication.app)

in running(FakeApplication(withGlobal = Some(MockGlobal)))

现在的样子:

"render the login page" in running(FakeApplication(withGlobal = Some(MockGlobal))) {
  val home = route(FakeRequest(GET, "/")).get
  // must redirect to login page
  status(home) must equalTo(SEE_OTHER)
  val x = redirectLocation(home).map { location =>
    location must equalTo("/login")
    val loginpage = route(FakeRequest(GET, "/login")) map { result =>
      status(result) must equalTo(OK)
      contentType(result) must beSome.which(_ == "text/html")
      contentAsString(result) must contain("Apps: Login")
    }
  }
  x must beSome
}

现在所有的测试用例都运行良好。我没有看到任何错误Configuration error[Cannot connect to database [default]]

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