Android Espresso: custom spinner selected item matcher by text. Checks if specific text presents in any TextView (or their heirs) of Spinner selected item.

MyCustomViewMatchers.java

package com.rirdev.aafl.demo.test.ui;

import android.content.res.Resources;
import android.support.test.espresso.matcher.BoundedMatcher;
import android.util.Log;
import android.view.View;
import android.view.ViewGroup;
import android.widget.Spinner;
import android.widget.TextView;
import org.hamcrest.Description;
import org.hamcrest.Matcher;

import static android.support.test.internal.util.Checks.checkNotNull;
import static org.hamcrest.Matchers.is;


/**
 * Created by IgorOK on 03.01.2016.
 */
public final class MyCustomViewMatchers {

    private static final String TAG = MyCustomViewMatchers.class.getSimpleName();

    public static Matcher<View> withTextInSpinnerSelectedView(final Matcher<String> stringMatcher) {
        checkNotNull(stringMatcher);
        return new BoundedMatcher<View, Spinner>(Spinner.class) {
            @Override
            public void describeTo(Description description) {
                description.appendText("with text In Spinner Selected View: ");
                stringMatcher.describeTo(description);
            }

            @Override
            public boolean matchesSafely(Spinner spinner) {
                return findTextRecursively(spinner.getSelectedView());
            }

            private boolean findTextRecursively(View view) {
                if (view instanceof ViewGroup) {
                    ViewGroup innerViewGroup = (ViewGroup)view;
                    for (int i = 0; i < innerViewGroup.getChildCount(); i++) {
                        View innerView = innerViewGroup.getChildAt(i);
                        if (innerView instanceof TextView) {
                            if (isTextMatch((TextView) innerView)) {
                                return true;
                            }
                        } else if (innerView instanceof ViewGroup) {
                            return findTextRecursively(innerView);
                        }
                    }
                } else if (view instanceof TextView) {
                    return isTextMatch((TextView) view);
                }
                return false;
            }

            private boolean isTextMatch(TextView textView) {
                String text = textView.getText().toString();
                if (stringMatcher.matches(text)) {
                    String resName = getViewIdName(textView);
                    Log.d(TAG, String.format("Text '%s' found in view with id '%s'", text, resName)); // LOG not work
                    return true;
                }
                return false;
            }

            private String getViewIdName(View view) {
                String resName = "@NULL";
                try {
                    resName = view.getResources().getResourceName(view.getId());
                } catch (Resources.NotFoundException e) {
                    Log.d(TAG, String.format("Resource not found. id -> %s", view)); // LOG not work
                }
                return resName;
            }
        };
    }

    public static Matcher<View> withTextInSpinnerSelectedView(String text) {
        return withTextInSpinnerSelectedView(is(text));
    }

}