依然无法与Salat / Casbah玩FakeApp的多重测试

我以为我暂时解决了这个问题，但事实证明我仍然有问题。

我正在尝试为我的模型图层创建一些specs2测试，我想插入一些虚拟对象，然后运行一些查询以确保数据按预期发布。 这是我的简单测试的样子：

class ModelSpec extends Specification {

    override def is = args(sequential = true) ^ super.is

    object FakeApp extends FakeApplication()

    running(FakeApp){
        println("set up database")
        val newUser = User(
                    email = "wfbarksdale@gmail.com",
                    username = "weezybizzle",
                    password = "nutterbutter")
        User.save(newUser)
    }

    running(FakeApp) {
        "User Model" should {
            "be created and retrieved by username" in {
                println("finding someone")
                User.findOneByUsername("weezybizzle") must beSome
            }
            "not find non existant user" in {
                println("finding nobody")
                User.findOneByUsername("nobody") must beNone
            }
        }
    }
}

这里是我从单元测试中得到的堆栈跟踪：

[info] Compiling 1 Scala source to /www/mojulo3/target/scala-2.9.1/test-classes...
set up database
finding someone
finding nobody
[info] ModelSpec
[info] 
[info] User Model should
[error] ! be created and retrieved by username
[error]     IllegalStateException: this Mongo has been closed (DBTCPConnector.java:123)
[error] com.mongodb.DBTCPConnector._checkClosed(DBTCPConnector.java:123)
[error] com.mongodb.DBTCPConnector.call(DBTCPConnector.java:207)
[error] com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:313)
[error] com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:298)
[error] com.mongodb.DBCollection.findOne(DBCollection.java:682)
[error] com.mongodb.DBCollection.findOne(DBCollection.java:661)
[error] com.mongodb.casbah.MongoCollectionBase$class.findOne(MongoCollection.scala:225)
[error] com.mongodb.casbah.MongoCollection.findOne(MongoCollection.scala:897)
[error] com.novus.salat.dao.SalatDAO.findOne(SalatDAO.scala:311)
[error] models.User$.findOneByUsername(User.scala:24)
[error] test.ModelSpec$$anonfun$3$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$3.apply(ModelSpec.scala:29)
[error] test.ModelSpec$$anonfun$3$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$3.apply(ModelSpec.scala:29)
[error] test.ModelSpec$$anonfun$3$$anonfun$apply$1$$anonfun$apply$2.apply(ModelSpec.scala:29)
[error] test.ModelSpec$$anonfun$3$$anonfun$apply$1$$anonfun$apply$2.apply(ModelSpec.scala:27)
[error] ! not find non existant user
[error]     IllegalStateException: this Mongo has been closed (DBTCPConnector.java:123)
[error] com.mongodb.DBTCPConnector._checkClosed(DBTCPConnector.java:123)
[error] com.mongodb.DBTCPConnector.call(DBTCPConnector.java:207)
[error] com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:313)
[error] com.mongodb.DBApiLayer$MyCollection.__find(DBApiLayer.java:298)
[error] com.mongodb.DBCollection.findOne(DBCollection.java:682)
[error] com.mongodb.DBCollection.findOne(DBCollection.java:661)
[error] com.mongodb.casbah.MongoCollectionBase$class.findOne(MongoCollection.scala:225)
[error] com.mongodb.casbah.MongoCollection.findOne(MongoCollection.scala:897)
[error] com.novus.salat.dao.SalatDAO.findOne(SalatDAO.scala:311)
[error] models.User$.findOneByUsername(User.scala:24)
[error] test.ModelSpec$$anonfun$3$$anonfun$apply$1$$anonfun$apply$6$$anonfun$apply$7.apply(ModelSpec.scala:35)
[error] test.ModelSpec$$anonfun$3$$anonfun$apply$1$$anonfun$apply$6$$anonfun$apply$7.apply(ModelSpec.scala:35)
[error] test.ModelSpec$$anonfun$3$$anonfun$apply$1$$anonfun$apply$6.apply(ModelSpec.scala:35)
[error] test.ModelSpec$$anonfun$3$$anonfun$apply$1$$anonfun$apply$6.apply(ModelSpec.scala:33)
[info]  
[info]  
[info] Total for specification ModelSpec
[info] Finished in 20 ms
[info] 2 examples, 0 failure, 2 errors
[info] 
[error] Error: Total 2, Failed 0, Errors 2, Passed 0, Skipped 0
[error] Error during tests:
[error]     test.ModelSpec
[error] {file:/www/mojulo3/}mojulo3/test:test: Tests unsuccessful
[error] Total time: 4 s, completed Aug 28, 2012 10:02:33 PM

它看起来像FakeApp以某种方式从数据库断开连接，而不是重新连接。 我查看了Play源代码，似乎应用程序将停止并重新启动，无论它是否实际上是同一个对象。 我认为这个问题可能来自salat onStop()方法或onStart()但我不确定。

我一直在努力一段时间，任何帮助，甚至只是如何推理的问题，将不胜感激。

---

这是因为它在插件的onStop方法中关闭了MongoDB连接。 我已经提交了拉请求，以便在测试期间不会发生这种情况：

https://github.com/leon/play-salat/pull/27

---

我已经改变了play-salat如何关闭连接的实现。

通常在应用程序停止时关闭所有连接是一件好事，因为插件将在应用程序重新启动时重新实例化。

问题是我在创建连接一次的lazy val中创建了mongodb连接，并且当应用程序停止时，只需在其上调用.close（）。

我已经做了什么来解决这个问题，现在连接已关闭，如果再次请求连接，它会创建一个新连接并将其传递给您。

这在Play-salat的1.1-SNAPSHOT版本中都可用，您可以通过添加直接使用该版本

resolvers += "OSS Snapshots" at "https://oss.sonatype.org/content/repositories/snapshots/"

此版本还包括salat 1.9.1和支持加盖收藏和网格:)

试试看，如果有什么不按预期工作，给我留言。

如果一切看起来不错，我很快就会发布最终的1.1版本。

---

执行specs2规范有两个阶段：首先创建规范，并带有所有示例。 然后它被执行。

你应该做的是：

class ModelSpec extends Specification with AroundExamples {
  // note the use of sequential here which is simpler than
  // overriding the "is" method
  sequential

  object FakeApp extends FakeApplication()

  // this method, defined in the AroundExamples trait
  // makes sure that every example is executed "inside"
  // the fake app.
  def around[R <% Result](r: =>R) = running(FakeApp)(r)

  // this will be only executed after the whole spec is created
  // if anything fails here, an exception will be caught, reported
  // and the rest will not execute
  step { 
    running(FakeApp) {
      println("set up database")
      val newUser = User(
                email = "wfbarksdale@gmail.com",
                username = "weezybizzle",
                password = "nutterbutter")
      User.save(newUser) 
    }
  }

  "User Model" should {
     "be created and retrieved by username" in {
       println("finding someone")
       User.findOneByUsername("weezybizzle") must beSome
     }
     "not find non existant user" in {
       println("finding nobody")
       User.findOneByUsername("nobody") must beNone
      }
    }
  }
}

我希望有所帮助。

链接地址: http://www.djcxy.com/p/65685.html

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