问题描述
我在 projectDir / app中的 AppLoader.scala 中有一个 AppComponents code>
I have a class AppComponents in AppLoader.scala in projectDir/app
我的测试在 projectDir / test / ControllerSpec / UserControllerSpec.scala
在 UserControllerSpec.scala 中，我尝试创建 AppComponents 的实例但编译器找不到 AppComponents 类
In UserControllerSpec.scala, I tried to create an instance of AppComponents but the compiler couldn't find the AppComponents class
override def components: BuiltInComponents = new AppComponents(context) //doesn't compile
但如果我包含语句 package app 在 Apploader.scala 中然后编译器能够找到 AppComponents 和上面的代码编译。
But if I include statement package app in Apploader.scala then the compiler is able to find AppComponents and the above code compiles.
我不明白这种行为。请有人解释一下。
I don't understand this behavior. Could someone please explain.
推荐答案
所以 AppComponents 只应对其他类/特征/等可见。在包裹外面。因为
So AppComponents should only be visible to other classes/traits/etc. outside a package. Because
它看起来像 UserControllerSpec 确实声明了一个包，但看不到空包的成员。
it looks like UserControllerSpec does declare a package and can't see the empty package's members.
此行为可能与Java保持一致，请参阅。
This behavior is probably for consistency with Java, see answers to Import package with no name Java.
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