Question

我创建了测试：

class MenuPresenterTest {

    lateinit var presenter: MenuPresenter
    lateinit var view: MenuView

    @Before fun setUp() {
        view = mock(MenuView::class.java)
        presenter = MenuPresenter()
    }

    @Test fun test_validation() {
        presenter.openActivity()
        verify(view).openActivity()
    }


}

MenuView

interface MenuView : MvpView {
    fun init()
    fun openActivity()
}

MenuPresenter

@PerActivity
class MenuPresenter @Inject constructor() : MvpPresenter<MenuView>() {

    fun initView(){
        view.init()
    }

    fun openActivity(){
        view.openActivity()
    }
}

MvpPresenter

open class MvpPresenter<V : MvpBaseView> : MvpBasePresenter<V>() {
    // things specific for current project

    override fun bindView(view: V) {
        super.bindView(view)
    }

    override fun unbindView() {
        super.unbindView()
        clear()
    }
}

MvpBasePresenter：

abstract class MvpBasePresenter<V : MvpBaseView> {
    private var viewRef: WeakReference<V>? = null
    private val disposables = CompositeDisposable()

    fun clear() = disposables.clear()
    fun dispose(disposable: Disposable) = disposables.add(disposable)

    open fun bindView(view: V) {
        viewRef = WeakReference(view)
    }

    open fun unbindView() {
        viewRef = null
    }

    fun isViewBound() = viewRef != null

    val view: V
        get() {
            if (viewRef == null) {
                throw NullPointerException("getView() called when viewRef is null. Ensure bindView(View view) is called first.")
            } else {
                return viewRef!!.get() as V
            }
        }


}

当我进行测试时，我得到：

java.lang.NullPointerException: getView() called when viewRef is null. Ensure bindView(View view) is called first.
at base.MvpBasePresenter.getView(MvpBasePresenter.kt:27)

任何想法为什么？

Answer 1

MenuPresenter() - 您不会在代码中的任何位置调用bindView，因此演示者不知道您的模拟视图。这意味着它不能是null。

运行测试android模拟时视图中的空指针

1 个答案: