Espresso CustomMatcher to help test things like Actionbar title

gistfile1.java

import android.view.View;
import org.hamcrest.Description;
import org.hamcrest.Matcher;
import org.hamcrest.TypeSafeMatcher;

import static org.hamcrest.Matchers.is;

public class CustomMatchers {

    public static Matcher<View> withResourceName(String resourceName) {
        return withResourceName(is(resourceName));
    }

    public static Matcher<View> withResourceName(final Matcher<String> resourceNameMatcher) {
        return new TypeSafeMatcher<View>() {
            @Override
            public void describeTo(Description description) {
                description.appendText("with resource name: ");
                resourceNameMatcher.describeTo(description);
            }

            @Override
            public boolean matchesSafely(View view) {
                int id = view.getId();
                return id != View.NO_ID && id != 0 && view.getResources() != null
                        && resourceNameMatcher.matches(view.getResources().getResourceName(id));
            }
        };
    }
}


Usage:
 
    import static com.octo.android.sample.espresso.test.CustomMatchers.withResourceName;

...//Your TestEspressoClass
    
    public void testActionBarTitleForScreenOneActivity() {
        onView(allOf(isDescendantOfA(withResourceName("android:id/action_bar_container")), withText("My Activity")))
                .check(matches(isDisplayed()));
    }