android – 等到IdleResource可以看到视图

我正在使用Espresso 2.2编写仪器测试.

流程我想测试：

>通过测试点击radioButton
> onClick启动对API的请求
>每次不同时间后我都会收到回复
>肯定响应触发在活动中调用的接口方法
> onRequestSuccess我在屏幕上创建名为vSetupAmount的其他面板可见

我想在点击radioButton后注册IdleResource,等待vSetupAmount变为可见.但我不能让它发挥作用.请告诉我我做错了什么.

我写过这样的IdleResource：

public class AmountViewIdlingResource implements IdlingResource {

    private CountriesAndratesActivity activity;
    private ResourceCallback callback;

    private SetupAmountView amountView;

    public AmountViewIdlingResource(CountriesAndratesActivity activity) {
        this.activity = activity;

        amountView = (SetupAmountView) this.activity.findViewById(R.id.vSetupAmount);
    }

    @Override public String getName() {
        return "Amount View idling resource";
    }

    @Override public boolean isIdleNow() {
        callback.onTransitionToIdle();
        return amountView.getVisibility() == View.VISIBLE;
    }

    @Override public void registerIdleTransitionCallback(ResourceCallback resourceCallback) {
        this.callback = resourceCallback;
    }

}

所以我将活动传递给IdleResource,链接视图与变量.我知道IdleResource不会让测试通过,直到isIdleNow()返回值true.因此,如果视图是View.GONE,那么它将不会更进一步.

它在测试中看起来如何：

// click of radioButton picked from radioGroup
    onView(withId(rgDeliveries.getChildAt(id).getId())).perform(scrollTo(),click());

    // wait for view to become visible
    Espresso.registerIdlingResources(new AmountViewIdlingResource(getActivity()));

    // go to button on view
    onView(withId(R.id.btnGetStarted)).perform(scrollTo());

    // unregister idle resource
    for (  IdlingResource resource : getIdlingResources()) {
        Espresso.unregisterIdlingResources(resource);
    }

所以我点击了radioButton. IdleResource已成功注册但没有任何反应.在我的设备API响应来了.正在显示vSetupAmount但是

amountView.getVisibility() == View.VISIBLE;

这是永远被检查(但我在屏幕上看到我的视图)总是返回false.

我究竟做错了什么？

解决方法

我知道这可能为时已晚,但我的回答可能对某人有所帮助.

>当您实例化并注册AmountViewIdlingResource时,保留对它的引用并仅注销该引用,不要取消注册所有IdlingResources.
>如果您的空闲资源实际上并非每次都空闲,那么您的isIdleNow()方法实现应该只调用回调的onTransitionToIdle()方法.

我需要做类似的事情,等待按钮出现在屏幕上,这反过来只有在HTTP调用完成后才能看到.我对视图可见性空闲资源的实现如下：

public class ViewVisibilityIdlingResource implements IdlingResource {

    private final View mView;
    private final int mExpectedVisibility;

    private boolean mIdle;
    private ResourceCallback mResourceCallback;

    public ViewVisibilityIdlingResource(final View view,final int expectedVisibility) {
        this.mView = view;
        this.mExpectedVisibility = expectedVisibility;
        this.mIdle = false;
        this.mResourceCallback = null;
    }

    @Override
    public final String getName() {
        return ViewVisibilityIdlingResource.class.getSimpleName();
    }

    @Override
    public final boolean isIdleNow() {
        mIdle = mIdle || mView.getVisibility() == mExpectedVisibility;

        if (mIdle) {
            if (mResourceCallback != null) {
                mResourceCallback.onTransitionToIdle();
            }
        }

        return mIdle;
    }

    @Override
    public void registerIdleTransitionCallback(ResourceCallback resourceCallback) {
        mResourceCallback = resourceCallback;
    }

}

希望这可以帮助