espresso ActivityTestRule用于具有通用类型参数的活动 [英] espresso ActivityTestRule for activity with generic type parameter

问题描述

我已经宣布了这样的活动

I have declared an activity like this

class QuestionnaireActivity<T : ProfileModel> : AppCompatActivity()

我想写一个浓缩咖啡测试，所以我写的是ActivityTestRule

I want to write an espresso test so I'm writting ActivityTestRule like

@Rule @JvmField
val activityRule = object : ActivityTestRule<QuestionnaireActivity<ProfileModel.PersonalInfo>>(QuestionnaireActivity<ProfileModel.LifeStyleInfo>::class.java){
    override fun getActivityIntent(): Intent = QuestionnaireActivity.getQuestionnaireIntent(InstrumentationRegistry.getTargetContext(), 3, ProfileModel.LifeStyleInfo())
}

但是编译器抱怨(关于ActivityTestRule的参数)

but the compiler complains that(its about the argument of ActivityTestRule)

only classes are allowed on the left hand side of a class literal

此处指出，泛型不能与 class 一起使用.

It is stated here that generics can't be used with class.

如果删除通用类型参数，错误将变为

If I remove the generic type parameter the error becomes

 Type inference failed.
 Expected type mismatch: inferred type is Class<QuestionnaireActivity<*>> but Class<QuestionnaireActivity<ProfileModel.PersonalInfo>!>! was expected    

我该怎么办?

感谢您的关注

推荐答案

类似于

similar to here the solution involves defining an inline function like this

inline fun <reified T: Activity> activityTestRuleWithIntent(intent: Intent) =  object : ActivityTestRule<T>(T::class.java){
    override fun getActivityIntent(): Intent = intent
}

则规则变为:

@Rule @JvmField
val rule = activityTestRuleWithIntent<QuestionnaireActivity<ProfileModel.LifeStyleInfo>>(QuestionnaireActivity.getQuestionnaireIntent(InstrumentationRegistry.getTargetContext(), 3, ProfileModel.LifeStyleInfo()))

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