Espresso - 如何获取当前活动来测试 Fragments? [英] Espresso - how to get current activity to test Fragments?

问题描述

我已经玩了几个星期的 Espresso 测试，最后我决定开始测试 Fragment.

I have been playing around with Espresso tests for couple weeks now and I finally decided to start testing Fragments.

我立即遇到了问题，如何获取当前活动?

Immediately I ran into a problem, how do I get current activity?

我的应用程序使用登录数据，因此我无法使用测试规则启动活动.简单的说，在做espresso测试的时候有没有类似getActivity()的东西?

My app uses data from login so I can't launch the activity with test rule. Simply put, is there something similar to getActivity() when doing espresso tests?

推荐答案

我通常是这样理解的，它看起来(并且可能是)hacky 但是，嘿，它有效

I usually get it like this, it looks (and probably is) hacky but, hey, it works

import static android.support.test.InstrumentationRegistry.getInstrumentation;

public class MyTest {

    private Activity getActivityInstance(){
        final Activity[] currentActivity = {null};

        getInstrumentation().runOnMainSync(new Runnable(){
            public void run(){
                Collection<Activity> resumedActivity = ActivityLifecycleMonitorRegistry.getInstance().getActivitiesInStage(Stage.RESUMED);
                Iterator<Activity> it = resumedActivity.iterator();
                currentActivity[0] = it.next();
            }
        });

        return currentActivity[0];
    }
}

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