在 Play for Scala 中测试注入控制器

Testing injected controllers in Play for Scala

我正在尝试按照 Play 文档中的 this example 来测试带有注入对象的控制器。我复制了示例,但在尝试调用网页时出现错误:

No implementation for test.Component was bound.

错误似乎是正确的,因为我没有调用 binding 方法,但如何解决这个问题?

这是我的代码:

package test

import play.api.mvc._
import javax.inject.Inject
import play.api.{ Environment, Configuration }
import play.api.inject.Module

trait Component {
  def hello: String
}

class DefaultComponent extends Component {
  def hello = "default"
}

class MockComponent extends Component {
  def hello = "mock"
}


class ComponentModule extends Module {
  def bindings(env: Environment, conf: Configuration) = Seq(
    bind[Component].to[DefaultComponent]
  )
}

class Application @Inject() (component: Component) extends Controller {
  def index() = Action {
    Ok(component.hello)
  }
}

添加到application.conf

play {
    modules {
        enabled += test.ComponentModule 
    }
}