如何在android espresso中访问回收站视图的子视图？

Question

我正在为Recycler视图编写Espresso单元测试。在Recycler视图中，我有可单击的文本视图。我想在espresso测试中对文本视图执行click事件。那么如何访问该文本视图？

Answer 1

试试这个，我测试了同样的

onView(withRecyclerView(R.id.recyclerView)
      .atPositionOnView(position, R.id.childView))
      .perform(click());

方法调用

public static RecyclerViewMatcher withRecyclerView(final int recyclerViewId) {
    return new RecyclerViewMatcher(recyclerViewId);
}

RecyclerViewMatcher

import android.content.res.Resources;
import android.support.v7.widget.RecyclerView;
import android.view.View;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

public class RecyclerViewMatcher {

private final int recyclerViewId;

public RecyclerViewMatcher(int recyclerViewId) {
    this.recyclerViewId = recyclerViewId;
}

public Matcher<View> atPosition(final int position) {
    return atPositionOnView(position, -1);
}

public Matcher<View> atPositionOnView(final int position, final int targetViewId) {
    return new TypeSafeMatcher<View>() {
        Resources resources = null;
        View childView;

        public void describeTo(Description description) {
            String idDescription = Integer.toString(recyclerViewId);
            if (this.resources != null) {
                try {
                    idDescription = this.resources.getResourceName(recyclerViewId);
                } catch (Resources.NotFoundException var4) {
                    idDescription = String.format("%s (resource name not found)", recyclerViewId);
                }
            }
            description.appendText("with id: " + idDescription);
        }

        public boolean matchesSafely(View view) {
            this.resources = view.getResources();
            if (childView == null) {
                RecyclerView recyclerView = (RecyclerView) view.getRootView().findViewById(recyclerViewId);

                if (recyclerView != null && recyclerView.getId() == recyclerViewId) {
                    RecyclerView.ViewHolder viewHolder = recyclerView.findViewHolderForAdapterPosition(position);

                    if (viewHolder != null) {
                        childView = viewHolder.itemView;
                    }
                } else {
                    return false;
                }
            }
            if (targetViewId == -1) {
                return view == childView;
            } else {
                View targetView = childView.findViewById(targetViewId);
                return view == targetView;
            }
        }
    };
}

Answer 2

你可以使用RecyclerViewActions

onView(withId(R.id.recyclerView))
    .perform(actionOnItemAtPosition(0, click()));

包括Gradle：

dependencies {
    androidTestCompile 'com.android.support.test:testing-support-lib:0.1'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.0'
    androidTestCompile 'com.android.support.test.espresso:espresso-contrib:2.0'
}