Espresso / daggerMock：Intents.release（）上的NullPointerException

Question

当我尝试使用daggerMock替换依赖项时，出现以下错误：

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.support.test.espresso.intent.Intents.internalRelease()' on a null object reference
at android.support.test.espresso.intent.Intents.release(Intents.java:140)
at android.support.test.espresso.intent.rule.IntentsTestRule.afterActivityFinished(IntentsTestRule.java:68)
at android.support.test.rule.ActivityTestRule$ActivityStatement.evaluate(ActivityTestRule.java:260)

这是我的Espresso Intents规则：

@Rule public IntentsTestRule<MyActivity> activityRule =
        new IntentsTestRule<MyActivity>(MyActivity.class, true, false);

这是我的考试

@Test
public void shouldDisplayToolbarOnStart() {
    startActivity();

    onView(withId(R.id.toolbar)).check(matches(isDisplayed()));
}

private MyActivity startActivity() {
    return activityRule.launchActivity(null);
}

我的Espresso自定义规则：

public class EspressoDaggerMockRule extends DaggerMockRule<RootComponent> {

    public EspressoDaggerMockRule() {
        super(RootComponent.class, new MainModule(getApp()));
        set(new DaggerMockRule.ComponentSetter<RootComponent>() {
            @Override public void setComponent(RootComponent component) {
                getApp().setComponent(component);
            }
        });
    }

    private static App getApp() {
        return (App) InstrumentationRegistry.getInstrumentation().getTargetContext().getApplicationContext();
    }
}

临时解决方法

找到了一种停止崩溃的方法：

@Rule public IntentsTestRule<MyActivity> activityRule =
        new IntentsTestRule<MyActivity>(MyActivity.class, true, false);

替换为

@Rule public ActivityTestRule<MyActivity> activityRule =
        new ActivityTestRule<MyActivity>(MyActivity.class, true, false);