scala – Play Framework and Slick：测试数据库相关服务

我有几个案例类如下：

case class Person (
  id        :Int,firstName :String,lastName  :String
)

case class Car (
  id      :Int,brand   :String,model   :String
)

然后我有一个像这样的简单DAO类：

class ADao @Inject()(protected val dbConfigProvider: DatabaseConfigProvider) extends HasDatabaseConfigProvider[JdbcProfile] {
  import driver.api._

  private val persons = TableQuery[PersonTable]
  private val cars = TableQuery[CarTable]
  private val personCar = TableQuery[PersonCar]

  class PersonTable(tag: Tag) extends Table[Person](tag,"person") {
    def id = column[Int]("id",O.PrimaryKey,O.AutoInc)
    def firstName = column[String]("name")
    def lastName = column[String]("description")
    def * = (id,firstName,lastName) <> (Person.tupled,Person.unapply)
  }

  class CarTable(tag: Tag) extends Table[Car](tag,"car") {
    def id = column[Int]("id",O.AutoInc)
    def brand = column[String]("brand")
    def model = column[String]("model")
    def * = (id,brand,model) <> (Car.tupled,Car.unapply)
  }

  // relationship
  class PersonCar(tag: Tag) extends Table[(Int,Int)](tag,"person_car") {
    def carId = column[Int]("c_id")
    def personId = column[Int]("p_id")
    def * = (carId,personId)
  }

  // simple function that I want to test
  def getAll(): Future[Seq[((Person,(Int,Int)),Car)]] = db.run(
    persons
      .join(personCar).on(_.id === _.personId)
      .join(cars).on(_._2.carId === _.id)
      .result
  )  
}

我的application.conf看起来像：

slick.dbs.default.driver="slick.driver.PostgresDriver$"
slick.dbs.default.db.driver="org.postgresql.Driver"
slick.dbs.default.db.url="jdbc:postgresql://super-secrete-prod-host/my-awesome-db"
slick.dbs.default.db.user="myself"
slick.dbs.default.db.password="yolo"

现在通过Testing with databases并试图模仿play-slick sample project
我遇到了这么多麻烦,我似乎无法理解如何让我的测试使用不同的数据库(我想我需要在我的conf文件中添加一个不同的数据库,比如slick.dbs.test)但是我无法找出如何在测试中注入它.

此外,在样本仓库中,有一些像“Application.instanceCache”[CatDAO]或app2dao(app)这样的“神奇”.

任何人都可以指出我正确处理测试游戏和光滑的一些完整的例子或回购吗？

谢谢.